carbs and fuel pumps
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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Sat Apr 18, 2020 9:01 am quote
If 170 does it then this could be the first round over.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sun Apr 19, 2020 1:42 pm quote
Running around without a main jet was very insightful. This helped understand when the main jet comes ON LINE and how to focus on that when it occurs in relation to throttle position when I began adding jets back in.

First with acquiring a 170MJ from Scooter Speed which was a good thing because it was almost like with out the main jet the sputter was obvious which was a relief.

Back down to 155MJ. Feeling a little sputter still. If I drive normal seems fine but if I do a shift early and WOT it has a sputter zone in the middle that eventually clears. Down to 150MJ seems to run clean and can pull 2nd or 3rd WOT the whole way no interruption if shift early.

Going to give the 150MJ a few miles and see.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Mon Apr 20, 2020 5:11 am quote
How's the CHT doing when held at WOT in 2nd or 3rd?
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Tue Apr 21, 2020 4:38 pm quote
Seems to be running just under 350 at sustained speeds above 50mph and around 325 cruising 45 mph.

When doing 2nd or 3rd extended WOT will get a temp spike past 350 at shift.

Rode it pretty hard did not see it pass 350.

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Ossessionato
76 Sprint V, 63 GL, 62 VBB, 05 Stella
Joined: 16 Jun 2011
Posts: 2793
Location: Chicago. Well, Evanston, but that's almost Chicago
Fri Apr 24, 2020 9:33 am quote
What's your throttle position cruising at 50+? Are you up on the main, or still down in the mid-range?

And I'd go richer on the main if I were you.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sun Apr 26, 2020 6:32 am quote
Thanks Chandlerman had to do another test ride to check and answer your question but answer is not so clear. It depends, can get scooter to 50mph without having main jet in carb. On test ride throttle position is 1/4 and above to maintain 50mph maybe at the crossover point.

Made a few adjustments. Dropped the pilot jet from 48 to 46. Was having a loading issue at idle seems better now.

Put hose clamp on air bellows. I've never had the bellows tightened up to the carb it has always been just slipped on. Decided to see what it might do tightened/sealed up.

Seems this might have dropped the temperature a few degrees. Notice the soak temperature is not as high possibly due to not slipping in warmer air from engine?

At sustained 40mph seeing less than 300 F 45mph 310 55mph 340. DO not see it go above 350 unless revving to red line. I am using an old VDO analog gauge. Temperature readings seem stable needle moves with revs. Temperature seems to be lower now than before 2020 tune up.

Why are my temps higher or seem to be compared to some of the other guys reporting temps like Swiss1939, Charlieman22, Christopher_55934? It is the type of instrumentation or something I'm not considering?

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hose clamp added to air bellows

Ossessionato
76 Sprint V, 63 GL, 62 VBB, 05 Stella
Joined: 16 Jun 2011
Posts: 2793
Location: Chicago. Well, Evanston, but that's almost Chicago
Sun Apr 26, 2020 10:38 am quote
to measure throttle position accurately, put a mark on the throttle itself, then put a piece of tape on the headset and mark out where the throttle sits for idle, 1/4, 1/2, 3/4, and WOT.

Otherwise, you're probably underestimating where your throttle position is.

I'd be nervous about 350 at 55 (I assume in 4th gear). To me, that's either your timing is too advanced and/or your jetting is still too lean in the mid-range.

I recall Jack saying somewhere that 320-330 was optimal heat soak temperature of a loaded motor.

I love that analog gauge, btw. I used to have an analog gauge, but it died and I never replaced it, just went to the digital, because they were so much cheaper.
Ossessionato
1980 P200E , 2005 Stella 177
Joined: 20 Jul 2018
Posts: 2181
Location: Staten Island, NY
Sun Apr 26, 2020 11:44 am quote
Bear in mind that my temps from yesterday were only city driving where I am pulsing throttle so as to not hold firm at one RPM longer than a few seconds as Im still breaking in my cylinder. So my temps are not at sustained runs or with any serious WOT speeds. But jack does suggest 300F is the target and I think 320 is the max if you know your jetting is good for sustained WOT runs. If you are getting 350 at mid throttle only going 45-55 then something is off, albeit your temps will be higher at mid throttle lugging it vs WOT. Ive gleaned this from Jack and Oopsclunk that temps should go down fast with idle, climb with mid range and hold steady at WOT.
Ossessionato
76 Sprint V, 63 GL, 62 VBB, 05 Stella
Joined: 16 Jun 2011
Posts: 2793
Location: Chicago. Well, Evanston, but that's almost Chicago
Sun Apr 26, 2020 6:20 pm quote
I was out on Lakeshore Drive today and ran at 55 for a while and temps never got above 275.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sun Apr 26, 2020 6:28 pm quote
chandlerman wrote:
I was out on Lakeshore Drive today and ran at 55 for a while and temps never got above 275.
Is your temp gauge using a spark plug sensor?
Ossessionato
76 Sprint V, 63 GL, 62 VBB, 05 Stella
Joined: 16 Jun 2011
Posts: 2793
Location: Chicago. Well, Evanston, but that's almost Chicago
Sun Apr 26, 2020 6:38 pm quote
no, it's a BGM 177, so tapped directly into the cylinder head.

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Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Fri May 01, 2020 5:37 am quote
Thanks for the feedback guys. Timing is at 19.

Took the scooter for a longer 93 mile ride on the 150MJ. I think it might be rich still, scooter does not seem very responsive 3/4-WOT in 4th gear seems dull. Seeing temperature creep past 350 @ sustained 60mph. Does not loose power but worrisome. Scooter runs very good though no complaints at all runs better than it has in all the time I've had her since 1990 thank you forever Jack. Scooter will run perfectly in 4th gear at 30 mph just putting around town (never before) and a moment later can be screaming down the road running out of room. It runs just perfect can not ask for more just temperature might be an issue.

Going down to 145MJ report to follow.

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Huntington Beach under cloud cover

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150MJ

Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Fri May 01, 2020 6:18 am quote
Welcome. I'm happy that your happy. Not quite there yet by the sounds of it.

Quite some journey, pictures look great. Where are all the people?

With the temperature at WOT high and the dead 3/4 to WOT throttle the main jet is more likely too small. I always expected this to run a 155 main jet.
If a bigger main makes the WOT go well but mid go rich then the atomiser is too big. Keep the big main and start dropping the atomiser. Try the 155 first and see what happens at wot with the temperature.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Fri May 01, 2020 6:52 am quote
Ah man it's so good though.

If lean why plug looking rich?

Sounds like the atomiser might be too big then. The 155MJ does not run well with the 268AS and X3. Going leaner from 155, 150 now to 145 is getting better.

Initial response is 145MJ is better, better throughout the entire rev range does this indicate leaning the main jet could suggest atomiser too big?

Back to 266AS and remain with X3 needle?

Going to put some miles on the 145MJ now since it's ready to go just to see what temps do.
Ossessionato
1980 P200E , 2005 Stella 177
Joined: 20 Jul 2018
Posts: 2181
Location: Staten Island, NY
Fri May 01, 2020 6:55 am quote
10 points leaner putting miles on is risky. Be careful! Doesn't hurt to go way rich on main to be sure.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Fri May 01, 2020 3:24 pm quote
Ran the 145MJ runs good but still seeing temperature creep to 350+ in 4th.

Took out 268AS and put in 266AS atomiser + 155MJ. The jetting got messy, 4 stroking below 1/4 throttle gets into power cleans up and revs out. Dropped the needle to clip 1 still dirty down low clears and revs out. More vibration than on 268AS but might have seen a higher top speed in 3rd.

Confused the 266 atomiser is acting very rich down low was expecting opposite. Might there be a tolerance or size issue with my 266 and 268 atomisers?

On temperature on WOT the 266AS/155MJ didn't seem to spike at the red line it was holding the temp below 350. But seems it was also creeping up to 350 in 4th before ran out of room. Temperature seems down with 266 but still creeping on sustained speed above 60. Also runs like crap now.

Did the weird thing again in 4th like it's running out of gas, starting happening at about 65 mph.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Fri May 01, 2020 11:00 pm quote
Does sound like your 266 is not doing what it should. Try the AS264. It maybe too small but it may not. You will be able to go up to clip 3 or 4 to compensate. And if needed a bigger pilot jet.
If the 155 was to big it wouldn't rev out. Increase in performance suggests it was weak at the top.
Might still have an issue with the float height. Maybe a bigger float needle seat. Should be 300 at least.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sun May 03, 2020 6:50 am quote
Agree my AS266 did not behave as expected which has me wondering about size tolerances. My eyes can't tell by looking at them and no means to measure. The AS266 is one that came in the carb originally. Have a AS268 & AS270 new from SIP. The AS268 with X3 needle clip 2 run excellent without main jet. Could practically run scooter without main jet if didn't need to exceed 50 mph. When going to AS266 the needle was wrong seems my AS266 might be bigger than the AS268 on hand?

Should we try a new AS266 from SIP and see if it behaves different?
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Sun May 03, 2020 7:48 am quote
I do think the atomiser needs to be smaller. If you stick with the SIP ones get a 266 and a 264. 155 main jet seems to be more correct and the X3 is good. Only the atomiser and pilot to adjust now.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Fri Jun 12, 2020 12:55 pm quote
Picked up a used P2 flywheel and lightened it up over at the lathe shope. Took longer than expected.

More jets arrived AS266, AS264 and a 350 float valve. Installed the 350 float valve jet with included needle and the AS266. Ran X3 needle in all clip positions, in position 4 it sputters at 1/4-1/2 throttle.

Ran with 155 main jet. After testing all 4 clip positions it felt slow at gaining RPM 1/2-full throttle thought might be rich. Dropped main to 150 and clip to 3.

Those changes helped make power better but seems like more vibration than before with AS268 in clip 2.

After installing new jets with flywheel still running float bowl empty. Replaced float with new 9g float. Float stop/drop is changed not adjustable. Needle clip also seems non-adjustable. New float seems to solve emptying float bowl issue.

Temperature from what I can observe in 4th gear with about 30 miles of thrashing exercising jet performance:

Idle 225
35mph 250
40mph 300
45mph 325
50mph 340
55mph 340

Final jetting with AS266 150MJ X3 needle clip 3 ran up to 65mph holding 340F. Seems like temp wants to creep up on 2 mile sustained WOT. See it spike above 350 and drop at shift. Need longer open stretches to test WOT without concern of other vehicles.

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reduced OD skim front

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Skim back mill hub

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float drop/stop molded into float assembly

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brass round thing - do I need this?

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AS266 155MJ X3 needle clip 2

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AS266 150MJ X3 needle clip3

Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Fri Jun 12, 2020 9:25 pm quote
hibbert wrote:
Idle 225
35mph 250
40mph 300
45mph 325
50mph 340
55mph 340
All sounding like progress. These temperatures are too hot. Put in a much bigger main jet. Something like 160 or 165. Be sure you feel WOT splutter before reducing.

Run this table of temperatures again but against throttle position. Do it all in 4th and hold cruise at each throttle position and see how hot it gets.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sat Jun 13, 2020 9:48 am quote
Started out with the plan to run the speed test again with throttle position and temps noted. Thought it might be an idea to remove the main jet and run on the new AS266 to see how it behaved. Not sure if that was a good idea or not things got hot just the same.

At a steady 35mph temps went to 325 at 40mph engine ran better and temp dropped to under 300. At 45 temp starts climbing again. Seems this runs hotter than with 150 main jet.

Runs OK sputters at 1/2 throttle in 4th gear. If run normally 1-3rd and slowly open throttle in 4th scooter will run up to 58mph about 1/2 throttle and will sputter if open more. Can run perfectly good up to that speed and throttle position you can feel hear where it's too much and back off. Also noticed engine seems to like a slight incline, RPM increased faster with incline compared to decline.

Temperature is climbing to 350 on 4th gear stretches higher now with NO main jet.

Ran test with X3 needle in clip 3.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Sat Jun 13, 2020 12:16 pm quote
Nothing too alarming. You should back off as soon as its over 325F. Letting it get hot is risky.

Ok. The 266 is too rich. Keeping on clip 3 and no main jet, put in the AS264. Just try 1/2 throttle in 4th. Fine tune the clip until the splutter has just gone. When correct 4th gear should run More throttle with no main jet.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sun Jun 14, 2020 1:05 pm quote
With the AS264, X3 needle clip 3 bog at opening to 1/4 then a burst of power. Worked all positions up to 1. Might have become distracted from the initial bog because with each leaning the burst of power became more intense. Back down to clip 4 bog seems gone scooter seems more driveable power seems less intense. My OCD had us test clip 1 again to be sure back down to clip 4 and began testing with main jet.

Tried 170, 160 and 150. Sputter with 170 and 160 no detectable sputter with 150 can take all of 2nd gear WOT to the end beginning at a low RPM. Seems like some vibration still.

Temps seem like they have come down and more stable. Seeing more space between needle and 350.

Engine speed comes down OK but idle begins to get heavy or load after about 40 seconds at traffic light. If I blip it sometimes it clears and gets on a beat sometimes I'll have to nurse it always been a nuisance.

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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Sun Jun 14, 2020 9:50 pm quote
Getting there. The initial bog will be the pilot jet. You can't fix this with the clip. Set the clip for the best ride at slightly under 1/2 throttle. If you get any part of the set up wrong it will confuse another part. Not many variables left though. Get the clip set and weaken the pilot to fix the bog.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Mon Jun 15, 2020 12:51 am quote
OK hear that still need help. It's difficult to know where to focus clip 1 provides most power and allows to open throttle more but more erratic and bewah at initial opening which caused me to correct by raising needle to clip 4.

This was determined without main jet using needle to tune best throttle response 0-1/2 without bog.

Currently on a 46 pilot with 2 1/2 turns on the air fuel. Based on bog going away with a richer needle setting would this suggest a larger pilot?
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Mon Jun 15, 2020 5:12 am quote
Ok. Pilot is weak bog. This is better. Still set the clip to run best between 3/8 and 1/2 throttle. Clip 1 to clip 4 is a big range. It only is effective in this throttle position. Once this is done just need to finalise the pilot jet and usually a small change in main jet at the end.

Pilot needs to be bigger. Once you have the clip set. Put in a pilot that is big enough to splutter at exactly 1/4 throttle. Now you know what too big is. Reduce the pilot a jet at a time, until 1/4 throttle makes the best power. Mixture screw has almost no affect at 1/4 throttle, so no need to worry about that.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Tue Jun 16, 2020 5:28 am quote
Thanks Jack easier said than done. Also using the Smell of Death tuning guide when you aren't around.

Removed main jet, set clip at 2 up pilot to a 52. Seems better. Put 60 pilot and went for ride for gas. Seems to appreciate a larger pilot the initial bog is mostly gone which leads to dangerous explosion of power in the mid range with clip higher, knew that. Seems less vibration throughout rev range with increase in pilot.

Sensing things might be closer but not really feeling any sputter at 1/4 decided to see what the smell of death procedure might reveal. Want to feel what rich is at 1/4 put in the largest pilot on hand 72. Maybe sputter hard to tell such a small window opening. Tried 65 maybe sputter not sure. Both a little dirty pick up on stand not terrible. Smell of death mentions if you turn air fuel screw closed if engine continues to run pilot too lean. In my case all jets tested 60, 65, 72 all run at a high speed tickover with no air fuel adjustment. As the screw is turned in idle speed increases on all jets with the 72 having slowest beat. I am dumbfounded.

At the end of the testing with suspicious results installed a 62 pilot X3 needle clip 2 AS264 and 150 main jet. Went for a quick ride. Temps still creeping to 350 but darn scoot runs pretty good.

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62 pilot X3 needle clip 2 AS264 150MJ

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62 pilot X3 needle clip 2 AS264 150MJ

Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Tue Jun 16, 2020 11:40 pm quote
All looking good. If it's all smooth now and the vibration is gone it's done.

If the tickover is too fast the mixture screw won't be so effective.

I think the temperature creeping up to 350F is that head. It's one of the older ones with a large squish area. If you can get hold of a newer Malossi head it should improve. For general use I'm sure it's good to go. Just keep an eye on it when at speed.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Fri Jun 19, 2020 6:30 am quote
Thank you Jack not ready for this affair to be over.

The scooter runs outstanding thank you the knowledge, generosity and patience.

There are a few things still finishing up. Do you think altering timing will impact on temperature? Currently at 19 BTDC.

There might be a slight richness off throttle would changing slide to 60 or 70 improve? Malossi CVF II booklet calls for a 70 we have a 50.

Still experiencing a loading situation after a high speed run. Have a theory, wonder if fuel pump vacuum line is filling with fuel and emptying into crankcase when RPM's drop off at idle. Seems after the fuel empties and clears the crankcase idle begins to get back to normal. Only happens after fast runs if normal city traffic driving does not occur. It takes about 30 seconds for the loading to begin after stopping might have something to do with at which point the pressure changes to allow drain back to crankcase. A few nuisance throttle blips can keep things happy. Is there a check valve that might work in the vacuum line?

The new style 9.5g float seems to have corrected the starvation issues and like that it's plug and play don't have to mess with it to get the height. Wondering if a lighter float might help with the loading issue after high speed runs? Is a lighter 6.5g float going to float higher that a heavier one? Fuel pump and 350 float valve seems good now.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Fri Jun 19, 2020 12:05 pm quote
If the timing is accurate 19 degrees is good for you as most of your riding is mid range. You could drop to 17, would run cooler at high rpm but it will be slower mid range. This is why we like variable timing.

This loading thing will be a temperature issue. Riding slowly before stopping cools it down. You could try a slightly smaller pilot jet and see what happens. This is probably the same issue as the slide. As long as 1/4 throttle cruise is running well and temperature stays down , a rich slide can be fudged with the pilot jet.
The float would mostly affect WOT and that seems better now.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Wed Jul 01, 2020 7:23 pm quote
Still fine tuning.

Decided to check timing had not confirmed with strobe & new lightened flywheel. As it turns out was at 20 set to 18 hoping to reduce sustained WOT temp. Seems to run smoother at high RPM but has lost power in the mid range. Feels better at higher speed maybe a shade cooler will monitor.

Dropped the main jet to 145, 60 mile ride likes it. Could not exceed 55 MPH because of clutch.

Rebuilt clutch with Onkle Mike DDog CNC basket that fits Honda CR80 clutch plates. Assembled using Pinasco springs and hollow cups just relieved from Bajaj, poor decision. Clutch is good and smooth but engine has too much power for springs, slipping when max power applied can only get 55 out of 4th.

Dropped the clutch key into the gearbox trying to fit a set of stiffer springs. Could not find key under kick start spring until engine split. Found, new cross, new gasket and bottom end bolted back up.

Question about top end, looks like some blow by. No complaints on how things are running are we good with one ring?

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setting timing to 18

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DRT push rod

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Onkle Mike DDog CNC Honda basket

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piston top

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piston blow by comparison

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Hot plug 18 BTDC 145MJ

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Hot plug 18 BTDC 145MJ

Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Wed Jul 01, 2020 8:21 pm quote
Been busy with the 221. Those old style clutches can end up quite heavy on the springs. SIP CR80 or Honda? The SIP ones are an upgrade for sure.

Some of that blow by on the piston is actually blow under. The empty ring groove is open to the exhaust for the blowdown duration. If it's still open try 2 rings. See if you can feel the difference.

Piston crown not bad. Black to the edge is good. Needs to be slightly richer at WOT but not going to have much issue.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Thu Jul 02, 2020 4:43 am quote
I am using Honda plates from flebay. Was not aware SIP had proprietary plates have a link for them?

Like in typical fashion like dropping the key into the casing I fit Toy Shop clutch springs 2nd time around. These were the stiffest we had on hand but after testing on the bench seemed too much so clutch back out and Malossi springs back in. Had the Malossi springs in since 2006 maybe longer.

Blow under makes sense. Noticed less compression on kick start with one ring will clean piston add ring and see.

Can you share the indicators on possible lean at WOT with the 145MJ?

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piston exhaust side

Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Sat Jul 04, 2020 6:35 am quote
Engine in running again with 2 piston rings as good as before now with new clutch main seal and Honda clutch plates with old Malossi springs.

Temperature seems to be creeping up again. Everything seems to be running great but concerned about temperature if 55 MPH sustained continues climbing above 350.

What I notice in 3rd gear if below the power band can push up the temp up, when engine gets into power temp drops momentarily then begins to climb as engine builds power seems to be a natural trajectory. Shifting into 4th temp is already raised to 300-325 and climbing to 350 anything above 55 MPH. Haven't been able to see what 4th will do due to fear of temp seize.

Started with 145MJ then 147MJ. Did not notice much change in temperature.

Tried the 148MJ that I had in the carb originally. Seems like it's dull in the mid range. Tried a 2nd gear plug chop at about 1/4-1/2 throttle with key switch.

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62 pilot
X3 needle clip 2
AS264
148MJ
18 BTDC

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62 pilot
X3 needle clip 2
AS264
148MJ
18 BTDC

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getting lite color back of ground strap

Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2376
Location: London UK
Sun Jul 05, 2020 12:00 am quote
Plug looks more weak than rich. To avoid the main jet confusion just take it out again. Everything to half throttle doesn't use it.

Plug does look more lean than rich though. The correct size is not the quickest one but the quickest without getting hot.

You could back your timing off to 16 degrees and see how that helps.

Any chance of getting a different head to try?
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Tue Jul 14, 2020 8:09 am quote
Took a good 90 mile ride to give the 225 a test and pick up a scooter tag. Scooter runs good, better than ever and exactly as we need it, Thanks Jack!

Wanted to ride the scooter at traffic speed to see how casual the scooter behaves. Runs exactly perfect no need to do anything other than what you want. Perhaps not as quick with the heavy flywheel but I'll take the torque instead.

Getting used to how this machine wants to be driven. Might be some of the components my guess is it has something to do with fuel pump, what I'm finding is scooter wants to be coasted down to the stopping point with brakes leaving in gear, sometimes high gear. Down shift occurs at the very end just bringing back to neutral. This seems to allow the engine speed and idle to behave as they should. If we don't operate this method we have a high RPM at stop and the loading of excess fuel that requires clearing and is a nuisance. I'm guessing since the engine RPM has been reduced with the brakes in 3rd-4th the idle RPM is calm and idle circuit is not overloaded.

Riding at traffic speed shows a big change in temperature, never comes above 300. At Idle seeing 200-225. It's amazing if I stop paying attention to the gauge and just drive as it feels good then look down and see cool temps, it's a good feeling. Seems all the testing pegging the speedo searching for the sputter's and all that really does spike the temps quick. If you drive it like you stole it shows on the gauge. Drive it within speed limits it barely gets warm.

Driving home in 90 heat stop light to stop light not getting very far very fast butt hurting back aching head sweating decided to take a chance on a short stretch of highway. From Downtown Los Angeles up to Pasadena or the other way around we have a great curvy short track like freeway called the Arroyo Secco. Originally it was a track, a two level wood planked roadway for bicycles at the turn of the century. Now it's a pretty freeway connecting Pasadena to LA. Took Hill Street onramp and slowly brought it up to 50 MPH watching the temperature gauge. Surprising the temperature came up to 300 and stayed there. Thought something was wrong kept going. Traffic was light and did not have to go faster. At times would increase speed to 55 and temperature began increasing above 300 which made me nervous.

As I got closer to Pasadena a slight incline required more throttle to maintain speed. I could feel the engine under load and slight temp rise. When engine RPM increased could feel a more efficient spot and temp drop.

Took the Arroyo Secco to the Fair Oaks exit excited and sort of doubtful on what just happened. Back on the streets running good as ever. On Huntington Drive it's bigger than the Arroyo and took a good stretch up to 60. When driving brisk see temps spike to 350 and back down just as quick. Never any power fade just concern when the needle goes past the middle.

Feeling confident the scooter will fulfill all our city needs at this point. Need to see if she can handle a sustained 60 miles per hour.

29D1D5BC-5D2A-4AEB-9D73-BC479D0C4CFD.jpeg

A3124A0E-290D-492D-A3E9-38EC5DBAD4E2.jpeg
Cold Plug
62 pilot
X3 needle clip 2
AS264
148MJ
18 BTDC

B898EFC4-3975-4906-BBEA-C1F9D62864C1.jpeg
Cold Plug
62 pilot
X3 needle clip 2
AS264
148MJ
18 BTDC

Addicted
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1003
Location: Rochester, Minnesota
Tue Jul 14, 2020 9:54 am quote
Out of Curiosity
What are you running for a carburetor currently? Would a power jet such as a Mikuni power jet help? My reason for asking is you can use a smaller main jet, then richen up the top end to help with heat. I like it because it gives you more control over tuning.

https://www.dellorto.co.uk/shop/dellorto-motorcycle-carburettors-parts/complete-carburettors-dellorto-motorcycle-carburettors-parts/phbh-26-to-30mm/r3496-phbh-30nd-with-power-jet/

https://www.mikunioz.com/shop/power-jet-kit/?v=7516fd43adaa

http://thunderproducts.com/product/thunder-powerjet/
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1166
Location: California
Tue Jul 14, 2020 10:13 am quote
Wow Christopher that might be a rabbit hole I don't want to go down. Not totally against the idea but darn just got the carb dialed in. I'm running an old PHBH 30 BD with the adjustment screws on the wrong side. Not sure where temps are going to fall but the carb seems tuned better than ever in the last 23 years.

F6D426FE-F7FF-4308-8ED5-A6D3C813CABF.jpeg

Addicted
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1003
Location: Rochester, Minnesota
Tue Jul 14, 2020 12:03 pm quote
I was thinking it might help you on the top end, where your engine temperature is creeping up over 300, getting up to 350. You could put in a really small power jet as it is adding to your main jet. I like them because you have a bit more adjustment or fine tuning.
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