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2009 Vespa GTS250ie. This vehicle runs great until it reaches operating temperature. Then it bucks, surges, stalls, runs rough, refuses to start until it cools off some…but other times it starts right up. This is what I've done so far; two fuel pumps, check the gas cap for venting, remove the emissions, evaporative system and plugged hose. Check for vacuum leaks. Ran with and without the "pet carrier" installed hoping it would run cooler. New air filter. Checked and cleaned the fuel injector several times. It was never plugged or had dirt in it. New spark plug. Adjusted the valves to specs. Electrical system checked for proper voltage and new battery stays fully charged. Plug cap checked for tightness to the wire and spark plug. Coil, plug wire and cap tested for proper ohms resistant, and they passed. All plug-in quick connectors cleaned and checked for tightness. Different fuels have been tried such as 87, 89, 91 and 93 octane 10% ethanol and ethanol free. No difference. 02 sensor checked for proper ohms resistance and it is functioning properly. While playing around with the O2 sensor, I started the Vespa without the electrical wires connected. Still ran rough and engine check light didn't come on even after riding it several miles. I shut it down and parked it for a couple of weeks in my barn. Two weeks later, I fired up for a quick run to the store, the engine trouble light flickered at idle but underway the light went out. The Vespa ran great when it was cool, and once the engine warmed up still continued to run great! By disconnecting the O2 sensor, I caused the computer to go into a safety or limp mode. It makes the fuel mixture richer. Thanking maybe I missed something on the O2 sensor, I ordered a new one from ScooterWest. Installed and connected it up. The scooter once again, started surging, bucking stalling at operating temperature. I unplugged it and it ran OK again. Concerned it may be running too rich I sent off an oil sample to Blackstone Labs to check for fuel contamination in the oil. Paperwork came back stating it just had a trace amount. Nothing to be concerned with. I continue to ride it this way. However, the other day I rode it to a business and parked in a large asphalt parking lot with half a tank of fuel. 91° day. Did some shopping and came back out, and the scooter cranked, but would not start. I pushed into the shade pumped about 2/3 of a gallon of cool gas into it. Crank but no start. Burning my hands I managed to disconnect the spark plug wire, and it had spark. Reattached it and pulled the fuel line. It was getting fuel. Still crank but not starting. Let it sit for a while longer while I made a phone call. Finish the call and it started right up And carried me home. What gives any ideas? What should I check next?
⚠️ Last edited by Soartenn on UTC; edited 4 times
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paging Bill WLeuthold to the lobby help desk phone. Your expertise is needed.

Is it possible that it has a malfunctioning temp sensor. The FI thinks its running too hot. ?????? Shutting it all down until it cools off/ resetting the brain.
Or an air pocket in the cooling system is stuck somewhere not letting it burp. ??

Im just spitballing here. you have already done nearly everything possible to troubleshoot this issue. Im scratching my head.
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Good idea about burping the cooling system. But I've already done that with the air bleeder valve. Positive there's no air in the cooling system. I'm not familiar with the temperature sensor other than the temperature sending unit for the instrument gauge dash cluster. Temperature indicator runs in the middle of the range. Also with a handheld infrared temperature unit from Harbor freight temperatures within the "pet carrier" area are about 136 degrees. I'm sure they were hotter when I broke down in the parking lot! Appreciate your input.🛵[/img]
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All I can think is the CDI unit going wonky, but I don't know this machine. It may have a CDI or it may all be controlled by the ECU. Sorry I could not help more.
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Thanks Tierny and Donttellmywife. Scooter now has 15,000 miles on it. Problems started at maybe 7,500 miles and two years ago. Also cruising along at highway speeds it suddenly feels like it dies then instantaneously resumes as if nothing was wrong…its more than bucking…more than surging. This lasts milliseconds. Took it to a well established multi brand and Vespa dealer. The service technician plus the service manager couldn't find any problems. I doubt they even rode it long enough to warm it up. Same dealer couldn't find any fault with the rear disc brake. It was spongy and wouldn't lock up the rear wheel. I was informed all Vespa's rear brakes are like that. As I wanted this fixed too. Said I knew better. I even got the owner involved. He listens and backs up his employees. I asked if they were Factory trained…yes. I asked if they passed the final quiz…no one answered . They said nothing is wrong and if I wanted they could 'throw' parts at it. But why do that when nothing's wrong? They know me. I'm a MSF rider coach and advise my students if they are looking at a used bike to get it inspected by a professional mechanic…them. Well not anymore. I don't want one of my students injured or worse on a bike that is certified as operating normally.
Trailered the scooter home and watched a ScooterWest Robot video on how to bleed rear brakes. I actually built a vacuum pump and managed to suck the air bubble out of the brake line. Now I can do an emergency lock up with the rear wheel, even though they supposedly don't by factory design. So now I don't trust dealers because of this AND troubles with a Yamaha dealer who I have been doing business with since 1978. My 2003 V-Star has 80,000+ miles on it. Wouldn't start. His technician says the ECM is bad and the part is no longer available. Takes two months to diagnose this. A used one is installed. $478 later I get the bike back. I go over it. Loose positive battery cable. Mismatched bolts and screws that were lost. Speedometer cable barely screwed into the front wheel. Tires severely under inflated. Even the ECM was just tossed into its housing and not bolted down. Throttle cable routed wrong causing the throttle to stick open. As I stated they had it for two months… Led a ride to a neighboring city for lunch run. Came out and the V-Star wouldn't start…then it suddenly did. Continued not starting then randomly starting that weekend. Took it back to the shop and the owner didn't want to work on it again…nor refund my money. He said, "As far as I'm concerned your bike is fixed. It wasn't running when you brought it here now it runs". I added 'runs sometimes…' I found a new ECM (electronic control module) from an aftermarket supplier in California. Bike runs great now.
Took the Vespa to an independent dealer who said he could fix it. Charged me $40 and didn't fixed it. Vespa dealers want anywhere from $130-$150 an hour to diagnose the Vespa problem. They charge one hour minimum. If they don't diagnose within the first hour, they pro-rate it if it takes less than the second hour. If they still can't figure it out, the charges just keep going. In other words, you're paying them to learn to work on your bike. I appreciate any and all advice from this forum. I really enjoy the Vespa when it runs properly. No other scooter's ergonomics fit me. Thanks again for your help.
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Try cleaning the throttle idle bypass port with some carb spray (remove the intake hose and look for the small hole next to the throttle butterfly inside the throttle body). Other than that, possibly your fuel injector might have a crack in it? This is a puzzle for sure.
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I want to agree with the above post about the certainty of the injector's status.
It can be cleaned\inspected but does it operate within limits at operating temps? I chase that theory cause it runs perfect when cold. When it gets hot, internal electrical continuity breaks down making it sputter. Just like the injector\coil packs on my Chevy truck.

Then I also wanna chase after the theory of the wonky ecm at operating temp.

I just recently replaced the ecm of my Goldwing ($850) cause the overheated ecm would trigger the FI light. Those are encased in a hard thermal barrier resin that breaks down after years of service. So normal temps make it store the code.

Still scratching my head for ya on this.
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Putting my money down on "cracked injector" and crossing my fingers for ya.
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If you go down this path, note that Piaggio-compatible injectors can be sourced very inexpensively using generic part numbers - as long as you only need the injector, and not the proprietary bracket.

The injector for my 500ie is a $30 generic part. With the bracket it is $210 and a two-month wait from AF1Racing.
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This is making me rethink selling my spare GTS250ie...

You mentioned a barn, any chance of a rat chewing on a wire somewhere? No signs of droppings around the bike / nests under the floorboards, etc?

You didn't mention a fan, but I'm assuming you've heard it running?
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I had a similar problem with my 2009 GTS250.

It turned out to be the spark plug lead. It goes from the battery compartment and comes very close to the exhaust, and the insulation melted. That caused an intermittent short after the scoot would heat up; especially when I went over bumps or sat down hard.

The solution was to replace the lead with a slightly shorter one that wouldn't rest on the exhaust. And also, to wrap extra insulation around the section of the lead that comes near the exhaust.
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phaskins wrote:
Putting my money down on "cracked injector" and crossing my fingers for ya.
That was my thought as my 2006 GTS would just die on me. A bunch of folks including AF1Racing looked at it. AF1 found some cracked fuel lines they replaced and that helped briefly but returned a few hundred miles later. It was an independent shop owned by a previously certified Vespa mechanic who found the cracked injector and replaced it. That was when the scooter was 11 years old. So in addition to checking your injector, spark plug lead as that's a known trouble spot I'd so ahead and change the fuel lines. Small cracks could be contributing to your issue.
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Facepalm emoticon I'll get back to work on the Vespa soon. Thanks for all your suggestions. Decided to work on my more simple 96 year old car. Had two out of four spark plugs not working. Don't understand, they were only 23 years old with low mileage. Car restored in 2000 just in time for the big "millennium bug" computer crash…that never happened. Thought this and other vintage vehicles would make good apocalypse cars. Champion plugs were replaced with Autolites and now it's firing on all 4 cylinders. A local parts store actually had them in stock. Plugs have 1/2 inch pipe thread, no gasket or tapered seat.
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Okay. Back to the Vespa. Checked the fuel injector and it is in fine shape. Working great no cracks. Also took off the intake manifold where it bolts to the cylinder head. No air leaks around there, but I put some high temperature silicone sealant around it and let cure for a few days. Fired up 2 1/2 days later and it's still acting up surging bucking not idling right. Not sure what my next move is going to be. No mice in the barn to chew on the wires. Plus I have barn cats that take care of any of that type of problem. I call it a barn but it has a concrete floor and it's sealed up pretty good. Has heat and Roku TV out here. I can watch ScooterWest videos all day long. Oh, and something else to add, I got my coil and heated it in the oven at 170° to make sure it wasn't breaking down under heat. Still tested good.
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Maybe its time to put my Vespa out to pasture…
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Have you had any progress in the investigation ? I'm still curious why it does this. It is possible mine might have these same issues some day. Please don't give up on her.
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NEW PROBLEM just now. Headed to town on this 79* Fahrenheit day. Engine is warmed up to normal operating temperature as I approach a stop sign. I roll off the throttle and the Vespa starts slowing down with compression braking…then the engine speeds up maybe an additional 750 RPM, enough to be noticeable so that I'm not slowing down…then the compression braking takes over again as the RPMs decrease…then the RPMs increase again maybe an additional 750 and I'm not slowing down…and this cycle keeps repeating itself again, then again, then again and so on. I stop and can feel the engine idling fast enough that it's barely trying to pull itself. The RPM gauge indicates one additional bar…instead of 1,500 RPM maybe 2,250. At the next stop it's running okay. At my destination as I park it it's idling fast again. Take care of business at the museum maybe 30 minutes. Vespa starts right up and continues okay though on the highway at 50 mph I can still perceive a slight 'surging' sensation. Made it home and now I'm sharing my story. HELP! Again please…
Dontellmywife; about traded for a Zuma 125 except I don't fit comfortably on it.
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When you replaced the fuel pump, did you use the OEM pump or those little ones you plug into the existing fixture?
Also, what size battery is in the bike now?
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Went with aftermarket fuel pump by itself first. No change in performance.Had an aha moment and ordered the factory original fuel pump assembly. Still no change. Ran the same with the original fuel pump, aftermarket fuel pump. And genuine Piaggio fuel pump. Absolutely no difference.
Something else I didn't mention is when I am surging down the road at anywhere from 30 to 60 miles an hour, when I crack the throttle wide-open and accelerate, it runs like a bat out of hell. No skipping, no surging, no bucking. Just smooth linear increase in speed till it runs out of breath at nearly 80 miles an hour…top speed. Does this additional information help? Thank again.🤔🛵
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My Burgman 400 did the same high idle symptoms. It was a bad idle air control valve. It made the FI light turn on a few times. Replaced it, calibrated the new one. Good as new. my old Yota truck did that as well.

Your Ecm has to be corrupted, sending Wrong\bad signals to the injector. Something internal in the brain \FI manifold. I can't see anything mechanical causing it to run that way. It has to be a programming, computer brain issue. I'm not saying you should burn money buying a new brain box, but everything points at it. I dispise wasting money on parts that didn't fix it.

Hope somebody will chime in that has already dealt with this same problem.

This is real head scratcher.
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November 30, 2023 stopped by the Vespa dealership in the big city east of me. They also sell Aprilia and Moto Guzzi. I was hoping the owner of the dealership was not there, so I could talk directly with their mechanic. When I had previously talk to the owner, I sensed a lackluster attitude (see previous above posts).
This time I did catch their mechanic 'J'. I explained the discussion I had with his boss about the diagnostic fee and if they didn't figure it out, the boss would call me to see if I wanted to continue to pay for additional diagnostic work…and that I didn't feel like paying someone to learn how to work on my Vespa if his mechanic couldn't figure it out in an hour. I then explained to 'J' the problems I was having with my Vespa, at least what I could remember at the moment. He said if he couldn't figure it out, he would get with the Piaggio representative, and perhaps with Robot at ScooterWest to sort this out and suggested I email him with the details. 'J' then gave me a card with the service department's email address.
On December 7 I had some business in the big city and decided to stop by the dealership on my way in. 'J' who is in the shop took time to greet me and asked how I was doing. I asked if he had gotten the email that I sent him with all the problems I was having with my Vespa. He then stated it was up to the Piaggio rep to look at it, and it was now out of his hands. I then mentioned there were other problems that I couldn't remember during our conversation listed on the email. We then went out to the service manager's computer and there was my 'ignored?' email. He was expecting the email as from our previous conversation. The email was addressed to him by name….and if it was out of his hands, the service manager other than showing it to 'J' would not know what to do with it. 'J' ask the service manager to go ahead and forward it to Piaggio. He then stated that it would be 2 to 3 days before he would hear back from Piaggio.
It's now been over a month since I was in the dealership and I haven't heard a thing from Piaggio or the dealership. The original intent of this conversation was to give 'J' some idea as to where to even start looking for the problem when I take my Vespa to this dealership.
Meanwhile, between Christmas and New Year's I stopped by my area's 'Jap' dealership. I didn't realize they were closed for inventory because there was activity in the parking lot, unloading new inventory for the showroom floor. An employee apologized for being closed, but if I needed something he would open up the store to help me get what I needed. I explained I was just there to kick tires and look around, but thanked him and that I'd come back when they were officially open. I did. His friendly attitude had earned my future business at this location! A Burgman 200 may soon be in my inventory as well as a Zuma 125.
Any thoughts of decent mechanics perhaps in Georgia or Alabama on the Vespa repair? Thanks again 🛵
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I'm waiting with lively enthusiasm for the resolution of this mechanical issue. Without question, there has been a decrease in customer service throughout the years. Over the summer there were several instances where I literally couldn't convince a so-called professional to work on a motorcycle for any fee and ended up doing so myself. The most vexing thing is, it wasn't that bad, in all cases.
The difference is that I knew what needed to be done. Diagnostic work is different. It's easy to dump on Piaggio but the truth is they've all become more or less greedy, incompetent, and lazy. The difference is that your new Burgman will likely be trouble free, lacking the "character " of an Italian vehicle.
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That sucks when customer service is that bad. You end up feeling like a 3rd class non-important patron to that business. Makes me severely annoyed for you. Im sorry about your frustrations.

Theres a guy in the back shop of HOOLIGANS here in Murfboro. He's an Italian specialist for MV, Aprilia and Ducati's. He has said to me in the past that he would do some Vespa maintenance. Not sure if he would dive into your mystery symptoms tho. Cant hurt to try. His number 1-917-972-0930


just wondering? Could you call Robot and ask him for his Guru knowledge directly. or even a detailed email.

Plan B. Find/buy a ---dead/crashed/neglected GTS for parts. Start changing parts until the symptoms quit.--- I'm still leaning towards a bad ECM/throttle valve. Again, cant hurt to try.

The Burg 200 is an outstanding little runner. Very comfy, good wind protection and ABS. If it fits your knees, go for it.

I'm currently looking for an older Forza or Reflex that's not trashed. Those are great little bikes for 6 footers. But an aftermarket XL windshield is needed. Both come with a 10 inch sporty wind deflector.
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Wow, that's been a frustrating journey. It's one thing to have a malfunction, but it seems the help you should be able to rely on is pretty dysfunctional too. Good luck with whatever goes in the future.

BTW, wondering, if GTS ergonomics are so good for you (my situation as well), why are you ditching the Vespa brand? Is it just the bad experience with support you've had?
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Ugh, bummer. Time to reach out to Piaggio customer service directly yourself.
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You've got an intermittent issue (or multiple issues) and you've done a whole heap of stuff yourself already, but you're only willing to give the dealer one hour to solve it?

Also have you changed the plug lead as suggested?
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Soartenn wrote:
(...)
Any thoughts of decent mechanics perhaps in Georgia or Alabama on the Vespa repair? Thanks again 🛵
I'm a bit too far away to help you on that.
But as a summary from what you have written:
- It is a GTS 250ie from 2009
- It did 15000miles
- You have the problem already for 2 years since mileage of 7500
- From cold start all is fine until it reaches normal operating temperature, then the problem starts
- But hot restart is also a problem
- On the other hand, at full throttle the engine runs fine, even when the engine is warm
- Sometimes it does not want to go to normal idle, RPM remains too high
- You checked among others the spark plug and cabling, the injector, the air box, the lambda sensor, and all is working as should
- You set the valve clearance to specification

From what I read you had only one action that resulted in an improvement and that was by disconnecting the lambda sensor. You think the ECU then goes in a safe mode with a richer mixture.

Is that a bit a correct summary?
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Soartenn wrote:
November 30, 2023 stopped by the Vespa dealership in the big city east of me. They also sell Aprilia and Moto Guzzi. I was hoping the owner of the dealership was not there, so I could talk directly with their mechanic. When I had previously talk to the owner, I sensed a lackluster attitude (see previous above posts).
This time I did catch their mechanic 'J'. I explained the discussion I had with his boss about the diagnostic fee and if they didn't figure it out, the boss would call me to see if I wanted to continue to pay for additional diagnostic work…and that I didn't feel like paying someone to learn how to work on my Vespa if his mechanic couldn't figure it out in an hour. I then explained to 'J' the problems I was having with my Vespa, at least what I could remember at the moment. He said if he couldn't figure it out, he would get with the Piaggio representative, and perhaps with Robot at ScooterWest to sort this out and suggested I email him with the details. 'J' then gave me a card with the service department's email address.
On December 7 I had some business in the big city and decided to stop by the dealership on my way in. 'J' who is in the shop took time to greet me and asked how I was doing. I asked if he had gotten the email that I sent him with all the problems I was having with my Vespa. He then stated it was up to the Piaggio rep to look at it, and it was now out of his hands. I then mentioned there were other problems that I couldn't remember during our conversation listed on the email. We then went out to the service manager's computer and there was my 'ignored?' email. He was expecting the email as from our previous conversation. The email was addressed to him by name….and if it was out of his hands, the service manager other than showing it to 'J' would not know what to do with it. 'J' ask the service manager to go ahead and forward it to Piaggio. He then stated that it would be 2 to 3 days before he would hear back from Piaggio.
It's now been over a month since I was in the dealership and I haven't heard a thing from Piaggio or the dealership. The original intent of this conversation was to give 'J' some idea as to where to even start looking for the problem when I take my Vespa to this dealership.
Meanwhile, between Christmas and New Year's I stopped by my area's 'Jap' dealership. I didn't realize they were closed for inventory because there was activity in the parking lot, unloading new inventory for the showroom floor. An employee apologized for being closed, but if I needed something he would open up the store to help me get what I needed. I explained I was just there to kick tires and look around, but thanked him and that I'd come back when they were officially open. I did. His friendly attitude had earned my future business at this location! A Burgman 200 may soon be in my inventory as well as a Zuma 125.
Any thoughts of decent mechanics perhaps in Georgia or Alabama on the Vespa repair? Thanks again 🛵
are you ready to sell it yet? I might be interested.
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I had a problem with my HPE that when idling it would surge in a sawtooth pattern and sometimes stall. Unplugging the lambda would make it idle stably but at a high rpm. The cause was too much air getting past throttle butterfly in the throttle body due to lots of wear. Replaced it and all good. Saw tooth idle [SOLVED]

Since it runs well with throttle open I'm sorta doubting anything else. This is 100% consistent isn't it? And do you mean when fully warm after 15mins riding? And did you mean at throttle 30% or only throttle 100%?

mind you you did say that sometimes when hot and stopped it would crank but not start - more info on this would be good such as hear the fuel pump? did it crank at a reasonable rpm? could you hear it fire but not quite catch? did it stumble but not get stable?

another thing, the ecu in an HPE does pay attention to the coolant temp and runs a slightly different mapping. Check the wiring for your scoot and see if the temp sensor is connected to the ecu, if so then probably the ecu cares.

lastly did you clean the idle bypass as already suggested?
⚠️ Last edited by SteelBytes on UTC; edited 5 times
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SteelBytes wrote:
I had a problem with my HPE that when idling it would surge in a sawtooth pattern and sometimes stall. Unplugging the lambda would make it idle stably but at a high rpm. The cause was too much air getting past throttle butterfly in the throttle body due to lots of wear. Replaced it and all good. Saw tooth idle [SOLVED]

Since it runs well with throttle open I'm doubting anything else. (this is 100% consistent isn't it?)
(...)
It is consistent, sure, but the scooter did only 15k miles, and the problem started as early as 7.5k miles.

That is nothing, it is an almost brand new engine. I cannot imagine at that low mileage there would be too much play in the throttle body. These Piaggio Quasar 250cc engines have a very good reputation with respect to reliability.
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PeterCC wrote:
It is consistent, sure, but the scooter did only 15k miles, and the problem started as early as 7.5k miles.
I wore my first out at 27,000km (17,000 miles)
I wore out a 2nd after another 24,000km (15,000 miles)

Sure that's double 7,500 miles and therefore not a first thought but does match the symptoms so could be. These magneti marelli throttle bodies sure ain't bullet proof.

Currently on my 3rd in a 4year old bike at almost 53,000km
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JenniferJupiter:
Thank you for your reply. Yes character… I like my scooters to look like a scooter, rounded contours and lines that flow; not with the angular lines like maxi scooters. It's just me. This is one of the cars I grew up around that a family friend had. And now resides in the museum. Note the streamlining.

Donttellmywife;
Thanks for the phone number. This may be a possibility. I have called Scooter West, but he has a layer of bodyguards I can't get by. I ask for Larry…oops…Jeff (Robot) a few times when ordering parts, but Fabio and the other parts order guy will not forward my request. I was told once he's on the phone it's difficult to pry him loose and take care of other responsibilities.

Fledermass;
Ergonomics are great on the large frame Vespas, however passenger comfort is better on the Burgman 200. My thinking on the Vespa brand is lack of oversight by dealership owners and perhaps Piaggio itself. When I have the owner, service manager and service technician say "they all do that" or "designed that way" I get concerned that after a new purchase, service and warranty claims may be a problem. I don't want to pay good money for a product only later to be insulted by them.

Adri;
Just now called Piaggio and talked with Scott D. Seems responsible . Good conversation with him. I am filled with hope…again…

Znomit;
Please know that one dealer had my Vespa for four days when the issue first occurred. I believe they didn't bother to warm it up as per my instruction, nor fix the spongy brakes which they said were operating normally. An independent repair shop could not fix the surging either. He was a graduate of 'Motorcycle Mechanic School' and worked at Honda dealership for years. Factory trained. I'll admit not a certified in Piaggio repair. Please also read how are Yamaha, Suzuki, Kawasaki dealership, botched my V star in an earlier post. Factory tech also. And Vespa problem not intermittent. Always does the surging when it operating temperatures. Other issues mentioned appear randomly.

PeterCC;
You are correct! Thank you for the summary except the hot start problem doesn't occur all the time. Just randomly at inconvenient times. The idle issue is something new.

Old as Dirt;
Getting close… Do you by chance ride a red Vespa? I've noticed one in that area.

Steelbytes;
Fuel pump does click. When it's not starting, I've pulled the fuel line off and have flow. But if it's at enough pressure I'm not sure. The independent shop I took it to did check the fuel pressure and 'he' said it was within specs. But then it was running fine at the particular moment.
Cranks at normal rpm.
Never would fire or try to. It would just suddenly decide to start…and not act like it was flooded.
Operating temperature is in the middle of the display range on the dashboard and verified with an infrared temperature sensor. 187 to 195°.
Temperature in the 'pet carrier' area was 132° plus or minus.
At throttle 100% accelerating from 30 mph to flat out…80 I don't notice any strange behavior.
Not sure where the idle bypass is located. Any help locating this would be appreciated.

Thanks all ya'll! 🛵
Chrysler Airflow
Chrysler Airflow
⚠️ Last edited by Soartenn on UTC; edited 2 times
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Well, you're probably not going to get much love from ScooterWest if you keep referring to Robot as Larry. His name is Jeff!
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Soartenn wrote:
Fuel pump does click ... Cranks at normal rpm ...Never would fire or try to. It

Not sure where the idle bypass is located. Any help locating this would be appreciated.
Idle bypass https://cheekythoma3.wixsite.com/itsme/idle Cleaning is described in link.


Cranking but not firing when you can hear the fuel pump directly after turning on the ignition has gotta be a spark issue I'd think. EDIT or fuel injector

Have you replaced the spark plug lead as mentioned? could also be the coil is flaky when warm. Although you would expect these to give issues when riding and warmed up. Check the voltage while it's in this warm and not starting state
⚠️ Last edited by SteelBytes on UTC; edited 1 time
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Juan…; Facepalm emoticon
Oops!🤥 My bad.
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SteelBytes;
I'll clean the idle bypass. Didn't know where to start. Coil, wire and cap have been checked for proper ohms. They passed. Stuck these items in the oven at 170° and they still tested good.🥶❄️ and 🥵🔥
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Soartenn wrote:
Coil, wire and cap have been checked for proper ohms. They passed. Stuck these items in the oven at 170° and they still tested good.🥶❄️ and 🥵🔥
I forgot to say or fuel injector which i know you have checked and works when cold and when riding.

So i don't have a theory that I'm confident about. I'm starting to think of damaged wiring between ecu and coil or ecu and injector
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Update as of January 31, 2024…
Sent an email with my issues and problems to one of the customer care representatives at Piaggio and it bounced back. No such address. Called again and verified email address. Didn't change a thing on the address since it was verified correct. This second email was sent January 22, 2024 and I suppose was received since no notification came back as undeliverable. Haven't received any response so today I called Piaggio customer service. The phone was picked up within two rings. I could hear background noises then the line went dead. Called back again and left message. Called another number I have for them. No answer and robo voice at the other end stated voicemail was full and cannot take messages at this time...Good bye.
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What level of service would you expect from a car dealership for a 15 year old car?
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znomit…Since the Piaggio customer representative on the other end of the phone asked me to send my information to him and he would then forward this to his factory tech, I assumed I was dealing with professionals. Kind and caring people who represented the best of their company. As you can imagine I'm an older person who remembers the time when people strove to be the best. Honest. Caring. Back when a job was a career. Machines were crafted, not assembled…or thrown together. Pride and quality was built into the product. Repairs had a guarantee. The name on the product represented quality. I'm from a southern state where we still ask who your people are when you first meet them. Who you are related to. If that family name represents good people, we assume the person you are meeting is a good person too. Call me naive. Gullible too, to expect a followup reply. Employed for 11 years at my my first company. Our prices were higher for our products and services (like Vespa), but we had loyal customers that liked our quality and dedication to complete the job. Our machine shop was the best. We sold automotive products, new and vintage. We could trace our company's beginnings to 1875. But demographics of our customers changed. Cheep was good. The bottom line was king. Save a dollar. I moved on and the company later got bought out, keeping part of the company name and our good established reputation. The new owners could do it cheaper but trying to build on the existing reputation. Then they got bought out and eventually out of business. Cheep is not good. Now 29 empty buildings dot the landscape. A few buildings were repurposed for other independent businesses.
I'm rambling like the old man I've become. What I'm saying is I thought I was buying a first class product from a company with a history of success and support that extends to their dealerships. I'm receiving no service. Should have bought a Chinese scooter from eBay.
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