my BLUE Bajaj fitting 60mm Crankshaft
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Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 1778
Location: california
Sun Feb 23, 2020 9:45 pm quote
Hibbert - nice work on the carb upgrades - and looks like your getting close on jetting. Keep leading the way!
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Mon Feb 24, 2020 7:00 am quote
So glad you are back on the BE3.

Poor starting hot usually means the pilot jet is too rich. 2 turns means the pilot jet is too rich. I doubt you float is leaking. Would certainly give a 42 140 or 160 size pilot jet a go

Plug looks ok for now.

I'll bet it feels quite a handful.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Wed Mar 04, 2020 4:56 pm quote
Got the 42-140 pilot and ran around on the 132MJ. Felt great initially through the gears but 3rd and 4th start to break up at the end when pushing it harder. Dropped main to 130 seems to have improved it again. More power down low and the break up might be gone. Still a little rumbly if not giving it more throttle. Air fuel went to 2 1/2 turns with new pilot. Seems it winds out faster but not as high say in 3rd I want to shift around 45 whereas I've seen it go up to 50 with other jetting. I like the performance much more at 45? Think I want to try 128MJ.

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42-140 pilot 132MJ hot plug normal shut down

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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Wed Mar 04, 2020 7:14 pm quote
Main jet is getting too small. Under 130 sounds dangerous. If breaking up at high rpm be sure it is rich not weak. They both feel very similar until it seizes. Remember this was running not bad with a 135.

The pilot jet has little to do with the main jet when wide open. Need wild variation in pilot jet size to even notice at WOT.

If 42/140 is now giving 2.5 turns on the mixture screw, its pretty close.

Do the main jet WOT runs in 2nd gear going down from obviously very rich, to slightly rich, to just barely splutters, then down one size more and that's the main jet done. The rest is all pilot jet.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Thu Mar 05, 2020 4:52 pm quote
Thank you. It seems almost perfect and 130MJ is feeling very good. Only a few things I do not like just yet. Slow speed in 4th gear 30-40 MPH still bumbley. It's gone from gurgley to burbley. Once it passes 40 mph it's ON. But I like to poke around in the 30-40 mph range. Can almost live with it but it could be better. Also compression feels rich. Doing a little chug-a-lug it's different in different RPM's ranges if hot on throttle then sudden shut a little buck giving a little throttle helps.

Should I try a 140AC?
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Thu Mar 05, 2020 7:28 pm quote
If the 130MJ is feeling ok at WOT and feeling better than the 132, then leave it there for now. AC140 will seize it up for sure. Reducing MJ lower than needed will leave it vulnerable. First long run where it gets really hot and......

At low throttle up to about 1/4, once the main jet is set at WOT, its all about the pilot jet. Need to go weaker. Jets that end in 160. I would try either 45/160 or 42/160 next. Just run a 1.6mm drill right through the end of the 42/140 if you haven't got a 42/160.

That filter on the carb is half the trouble. They are difficult to set up, especially when tuned this much. Would seriously consider getting a vortex.

If just issues with the low throttle, then the end is in sight. This is the last bit on an SI carb.

Edit: forgot about the slide. Should have number 4 original slide with the cut out underneath.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sun Mar 15, 2020 7:38 am quote
Got a 42-160 pilot. On the stand scooter would not rev out similar when I dropped the pilot the last time, it dropped the main from 132 to 130. So even though it was discouraged I went to 128MJ. Scooter runs much better down low but breaking up again in high rev. Drop main to 125 still breaking up down to 122 same but less. Something is wrong. New plug but B9. Fixed back to 130 main. Incredible.

Question about fouled plugs. Seems I fouled the plug and going to the 42-160 pilot was able to make this discovery. What causes this? Was it that it was running a rich mixture for a time and when dialed in the plug had gone bad?

We are having weather here in sunny california, I love it the local trout streams are getting long overdue precipitation. I am not as tough as Sime66 or the other lads that commute in the rain. Will wait for dryer days to do more testing. After learning about Charlieman's test will have to make sure 130MJ is safe for bajaj.

Regarding the float bowl spacer discussed in Sime66's bend me over a barrel thread, in my situation it seems the only negative impact I'm noticing is flooded engine when parked. I seem to overcome this by making sure the fuel is shut OFF and let engine run a bit before shut down. When I don't do that it's a 3 or more kick start and clearing of carb, probably not good for plug health. Other than that can't think of other side effects except notice a little loading when on bumpy roads. Also I've let the scooter idle on stand for 5 minutes and longer doesn't seem to be a problem when running and throttle pick up is still excellent after idling for minutes! So seems spacer is working OK for now. Might go ahead and purchase the 2.0mm from Scooter Center for the price it's good insurance and may help with my starting issue.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sun Mar 15, 2020 10:55 am quote
We had a break in the weather this morning so I taped the phone to the legsheild and went for a ride. This is not the first time attempting to make a riding video but the other times didn't turn out the way I intended and the scooter was not riding properly. This time only one struggle and one that's been repeated 2 other times same place same thing, running out of gas hitting reserve thinking something went wrong. This time like the others just gas which may have contributed to the running prior but not terrible. Still need more miles to know how Chetak likes it.

At minute 4:20 just getting warm cruising along at 55. Most of the cruising is around 55 indicated. At minute 6 cruising at 55 towards the end opening up to 60. At 6:55 shift into 3rd early do a WOT. Started to break up a little but maybe fuel issue just before reaching reserve stretch 4th past 60. At minute 8:45 in 4th bring it down to 30 mph and do a WOT. It has plenty of power maybe not crazy but it pulls hard all the way. I'm sensing it's weak and I'm afraid. Moments later it reaches reserve. Honestly I'm afraid to go faster. There are times I'm touching 65 and it's not even finished. Hands down the best machine I've operated ever in my life and owe a many thanks to so many gents here.

The scooter runs incredible at this point. So much vibration is gone (even though it rattles like ____). Seems going faster reduces vibration which is making it feel safer to go faster. I've rebuilt the front brakes, they needed it bad, this has added some safety.

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Hooked
1984 PX(BGM187)EFL
Joined: 14 Apr 2017
Posts: 384
Location: Cornwall UK
Sun Mar 15, 2020 12:23 pm quote
Good bit of filming Hibbert; I haven't watched it all yet because I was keen to extract some data.

https://youtu.be/p36rNcdTlPY

That's the audio extracted from your 'early-3rd' run from 6:50 to 7:40. The quality of sound recording is just clear enough to see the curves; I think, estimating your max revs and counting your gear changes, I've found the two main ones.

To get power data that 3rd gear wants to start at least that low (under 3000rpm; your 1st and 2nd would be lower too, but I can hear yours weren't), but rev-out fully in 3rd; you only go to about 7200rpm, then do a long 4th WOT, which goes to about 6500rpm. It was the long 3rd (from as low as you can to high as you dare - or it can), not the 4th that was needed. Your 3rd gear is about 7s; make it more like 30s. I'm not sure what piston/rings you have so don't know what max revs is safe for your rings, but it sounded like there was more in 3rd; my recently retired DR used to go to 9000 before the detune, then still went to 8200 last weekend before mothballing for the BGM swap-over. Note, I'm not suggesting you rev past what is safe for your rings!
I think Your Bajaj was originally a 150? - If it's the same gearing as mine, or somewhere similar 7200 in 3rd is roughly 49mph, and 6500 in 4th is roughly 59mph. Without your data that's only a rough estimate; you might want to play with the gear/speed calc page:

https://www.scooterhelp.com/tuning/vespa.gear.calc.html

We'd also need your combined weight (you, your scooter, toolbox, fuel etc), and your tyre circumference and gear ratios as a minimum of data for the front sheet if you want an idea of power.

Nice quiet Sunday morning roads too - sweeet.
Ossessionato
1980 P200E , 2005 Stella 177
Joined: 20 Jul 2018
Posts: 2189
Location: Staten Island, NY
Sun Mar 15, 2020 1:11 pm quote
Ha I did that a few times over the summer. Ran out of gas while testing jets and spent some time on the side of road freaking out thinking it was something else going wrong. Only to realize I was stupid and ran out of gas!

BTW, I noticed this also about tuning when I went from stock Stella to PNP Malossi 166. On stock stella going max WOT 55mph the bike shook like an earthquake and felt scary as F. PNP Malossi 166 and WOT max speed I think was 67mph. Going 55 on the PNP kit felt like I was going 35-40 now in terms of vibration. Even 67 didn't feel as terrifying anymore. I am looking forward to the ported kit with timings set up properly.. expecting 75 to maybe 80mph max at WOT, which means cruising on commute at 60-65 I expect is going to feel very comfortable with no sketchyness from vibrations.

Also regarding your sound recording for GSF. Instead of mounting phone to front of leg shield where you are getting lots of environmental noise, just stick it in your jacket pocket or t-shirt pocket inside your jacket. This will still get plenty of engine rpm volume but will help reduce background noise.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Sun Mar 15, 2020 8:20 pm quote
Riding really strong. Video makes it sound like it shakes and rattles a bit but nothing sounds so bad.

The having to turn the fuel off is affecting the jetting. Sounds a bit rich at some points. Seems to be running smooth enough but will be using a lot of fuel. I would reduce the float height 1mm and re-jet main and pilot. Will only need to go up slightly without the drip.

If you think this is fast the 210 is going to be exciting. Glad you like it. Sure no-one expects an old Bajaj to be so quick.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Sun Mar 15, 2020 8:36 pm quote
swiss1939 wrote:
PNP Malossi 166 and WOT max speed I think was 67mph. Going 55 on the PNP kit felt like I was going 35-40 now in terms of vibration. Even 67 didn't feel as terrifying anymore. I am looking forward to the ported kit with timings set up properly.. expecting 75 to maybe 80mph max at WOT.
Not sure you'll be seeing 80mph except down a big hill or with special go faster stripes and tuned speedo. Going to be good for 75. They tend to be a bit like racing powerboats and end up needing double the power to do 1 knot more.
Ossessionato
1980 P200E , 2005 Stella 177
Joined: 20 Jul 2018
Posts: 2189
Location: Staten Island, NY
Sun Mar 15, 2020 8:41 pm quote
Good enough for me Jack!

Glad your Bajaj is riding great hibbert.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sat Mar 21, 2020 5:27 pm quote
Ran the scooter up a slight incline but chickened out after about 4 miles didn't want to cause a problem being out of cell reception. On the ride down had some problem while on compression any time closing throttle in 4th gear around 40-45 mph scooter would buck, would have to open throttle to keep running smooth which would increase speed which was trying to do opposite. Scooter can run on compression.

Is it too rich, too lean, float spacer dribbling?
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Sat Mar 21, 2020 8:45 pm quote
Think this is the dribbling. At some angles it will stop dribbling. When this happens it will go lean. The bucking when going off the throttle means very lean. When it starts dribbling again the jetting will be correct.

If you reduce the spacer and check you can leave the fuel on, bounce the scooter around and still start it hot, then you're good to go. Small up jet of main and pilot and will be done.......end of round one. There is more.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sun Mar 22, 2020 8:56 am quote
Thank you, for clarification there was an error in my last sentence, the scooter will NOT run on compression. Noticed this around town but it became a problem when coming down the hill and not requiring power from the engine. Normally on compression you'll get a periodic pop from the exhaust and things are swell. In this case it feels as if there is a dump of fuel and more air is needed to keep the engine alive. When you say leaning that was not my interpretation and was thinking of trying a 128 main jet but want to wait for the 2mm spacer to see if that resolves some of whatever it might resolve first. What is dribbling? Thought this was excess fuel dribbling into engine from raised float level?
Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 1778
Location: california
Sun Mar 22, 2020 4:32 pm quote
Hibbert - allow me to decipher.
Basically what Jack is saying is - the float level may be so high - gas drips in depending on what angle the scooter is at - leaning right, forward, what ever.

So it is fooling you on jetting. Be careful about making it too lean with your main jet...

His fix - any spacer you use needs to allow you to lean the bike a bit in different directions without seeing gas drip in to the carb. If it is - you need to use a smaller spacer (no spacer?) to avoid that happening.

Dribbling = float too high causing gas to be dribbling in to motor.

Signed - CM: translator at large.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Sun Mar 22, 2020 7:09 pm quote
Interpretation correct. If the float is too high there will be a variable level of overflow into the venturi. This will make the jetting confusing and all the usual sounds not as they should be.

While waiting for the 2mm spacer, which still maybe too much. Works on mine but each will be different. Expect if you have 3mm nearly working 2 should be ok. If you try about 4 gaskets with no spacer it might be enough.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Thu Apr 16, 2020 6:34 am quote
The 2mm Scooter Center float spacer arrived and installed. Quality not as good as 3mm SIP spacer. Not sure if it's the nature of the thinner material or quality. Had to file the carb float riser to fit spacer the SIP spacer did not require this.

Seems to have helped. Not having the compression issue like before. Ran up and down a slight incline (to see a sign) seems to be OK. Seems like dribble might be solved. Let it come down on compression throttle closed, no bucking and periodic pop as expected.

Still having a stutter or strange issue that may be occurring at the pilot/main transition if just cracking throttle not enough it wants to buck if open throttle more passes it if close buckering new term. If this is dribble does not seem to be the affected by slight grade.

The universe had something to say yesterday. Clutch was slipping which I was in denial about but seems when things warm up clutch slips. If cruising can get scooter to about 55 but if apply power it slips. Got the scooter to 65+ clutch slipping can't imagine what it will do with a tight clutch. Finally about 4 miles from home at green light 1st gear clutch self de-assembled itself I am guessing going in to find out.

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Hooked
GS160
Joined: 11 Jun 2014
Posts: 292
Location: Åland
Thu Apr 16, 2020 7:11 am quote
Sorry for your trouble but I really like your pictures.
Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 1778
Location: california
Thu Apr 16, 2020 7:21 am quote
Hibbert - great shots!
Where are you with jetting?
In my experience - the only time I can create that pause in transition from idle to main is when my idle is too lean.
Perhaps different for yours - but that's been my experience.
Sorry to hear about the clutch - but hopefully a rebuild and oil change is all that's needed.
Sure was a gorgeous day for riding yesterday.
Cheers.
-CM
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Thu Apr 16, 2020 9:27 am quote
CM could not believe what was out and about walking around yesterday, black stretch pants are in apparently so good... So many shapes sizes and flavors.

Think the jetting is pretty close but have to get the clutch to stick before will know for sure. Was warned about the clutch being too weak and will have to figure out which exotic clutch will be suitable. Not looking forward to having fitting issues with it. Open to suggestions on what is good and what will be available for spare parts down the road not interested in trial products and future obsolescence would prefer something genuine Piaggio.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Thu Apr 16, 2020 10:47 am quote
would a banded basket make a difference?

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Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 2042
Location: Veria, Greece
Thu Apr 16, 2020 11:02 am quote
Carnage!!!
Yeah, you definitely need a banded clutch...
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Thu Apr 16, 2020 11:56 am quote
seems like it was working ok until the basket went out

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Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1531
Location: UK (South East)
Thu Apr 16, 2020 12:59 pm quote
Hibbert, I see you are/were still on a six spring clutch. I can't say I'm surprised it gave up on you, but that basket damage is pretty dramatic. I would band any stock clutch in a tuned motor, if a gourmet clutch (Super/Utrastrong) is not. an option. However, I would and have started with either a seven spring from a P2 or a Cosa clutch. I have one of each in my 200+ cc scooters, both banded, and both serving me well (so far).
bodgemaster
63 GL, 76 Super (x 2), 74 Primavera (x 2), 06 Fly 150
Joined: 26 Sep 2013
Posts: 5477
Location: So Cal
Thu Apr 16, 2020 1:00 pm quote
Yikes. Larger diameter 7-spring might be all you need.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sat Apr 18, 2020 6:29 am quote
Did not know you can use a 7 spring in place of a 6 spring man what was I thinking, still learning guys. Any objections going to a BGM 8422 it's not banded

https://www.scooter-center.com/en/clutch-bgm-pro-superstrong-2.0-cr80-ultralube-type-cosa2/fl-for-primary-gear-67/68-tooth-vespa-px80-px125-px150-t5-125cc-cosa-sprint150-rally180-gt125/gtr125-ts125-gl150-super125-vnc1-11001-super150-22-tooth-bgm8422?number=BGM8422
Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
Joined: 26 Jan 2019
Posts: 1778
Location: california
Sat Apr 18, 2020 7:16 am quote
Hibbert - this is what I run - with a side car... and it lives up to its name.
As a bonus - it is also super smooth.
Highly recommend.
One word of caution.
A spacer was required for mine - no amount of tweaking the cover to avoid interference was viable.
The clutch itself tho has been trouble free and puts up with a beating with ease.
Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1531
Location: UK (South East)
Sat Apr 18, 2020 7:16 am quote
Perfect choice, albeit a little OTT for the application. They don't need to be banded because the baskets are CNC milled and very strong. When using a bigger diameter clutch in place of a six spring, you'll most likely need to grind back one or two obstacles in the case casting. I believe you'll also need a 200 clutch cover.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sat Apr 18, 2020 7:27 am quote
Charlieman22 I remember seeing you had a thick cover spacer, much thicker than expected when I saw it. What is the thickness and part number thank you?

CM22 did you do anything with the springs or just what came with?

Thanks guys the Chetak scares me more than my P222 it is a monster.

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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Sat Apr 18, 2020 7:44 am quote
A banded 7 spring will be enough and will fit easy. Superstrong are a pain to get to fit but worth it in the end.
That 6 spring was never going to last. I think that was said before. Once set up is done that chetak should do over 70. Probably similar to the 222 but that would do it 2 up.
Ossessionato
1980 P200E , 2005 Stella 177
Joined: 20 Jul 2018
Posts: 2189
Location: Staten Island, NY
Sun Apr 19, 2020 6:04 pm quote
I have the same bgm clutch. fit easily on stella with only needing to grind the rib on the inside of the clutch cover. Haven't run it yet to see how it feels. Can't wait to run it.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Wed Apr 29, 2020 7:33 pm quote
Clutch is in

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Hooked
1984 PX(BGM187)EFL
Joined: 14 Apr 2017
Posts: 384
Location: Cornwall UK
Wed Apr 29, 2020 11:35 pm quote
Sweeeet; got the cover on? Got it running? We need more splendid photos of your rides, but without the metal-mangle afterwards...
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Thu Apr 30, 2020 6:46 am quote
That's the clutch fixed forever. From worst to the best.

Did you reduce the 3mm packer and do the 25 degree lean test on the float yet?
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sat May 09, 2020 9:25 am quote
The Superstrong clutch is in and seems to be working fine. Few observations, there was a lot of space or rotation of the clutch arm before the push rod makes contact with pressure plate. Concerned about how much push rod exiting cover. Like the looks of the DRT push rod Sime66 referenced on his over the barrel thread. I over tension-ed the clutch cable initially. After adjusting clutch lever has light initial pick up becoming stiffer deeper into the drawl stiffer than I expected but transferring power much better. Picked up Maxima MTL oil at scooter speed will this be OK?

Tried leaning the scooter over on the rear wheel and kick stand. The drip from the venturi occurs at same place with spacer. This may not be the appropriate test geometry though.

Scooter isn't running so great now after dismounting the PE. Something is wrong 0-1/8 0-1/4 throttle range. Scooter will stutter, buck, hiccup, cut out at what seems to be the cross over point am guessing. Whether it is opening the throttle or closing the throttle it seems to behave the same at the same place in throttle position. Seems to be throttle position driven effect does not matter what gear what speed. It is the same symptom reported since March.

Through a process of elimination removed the float bowl spacer. After spacer removal had a bog 0-1/4 and seemed weak. Incrementally increased pilot jet 3 points now on 45-140 and 2 turns on the air fuel.

Went back through the main jet starting with a 135 then 132 and back down to 130. Going to run around on the 130 and see.

The bucking, stutter hiccup seems to be gone but still not factory smooth. While testing the main jet again it was sputtering but getting better towards the end of each leaner jet. Wondering if the atomiser needs to change if it's sputtery in the mid but cleaning up on the top? Current jet set 120AC BE3 130MJ and 45-140 pilot.

Got a new BR8HS in with the new jet set.

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Molto Verboso
2007 Stella 150
Joined: 02 Nov 2019
Posts: 1114
Location: Rochester, Minnesota
Sat May 09, 2020 10:03 am quote
hibbert wrote:
The Superstrong clutch is in and seems to be working fine. Few observations, there was a lot of space or rotation of the clutch arm before the push rod makes contact with pressure plate. Concerned about how much push rod exiting cover. Like the looks of the DRT push rod Sime66 referenced on his over the barrel thread. I over tension-ed the clutch cable initially. After adjusting clutch lever has light initial pick up becoming stiffer deeper into the drawl stiffer than I expected but transferring power much better. Picked up Maxima MTL oil at scooter speed will this be OK?

Tried leaning the scooter over on the rear wheel and kick stand. The drip from the venturi occurs at same place with spacer. This may not be the appropriate test geometry though.

Scooter isn't running so great now after dismounting the PE. Something is wrong 0-1/8 0-1/4 throttle range. Scooter will stutter, buck, hiccup, cut out at what seems to be the cross over point am guessing. Whether it is opening the throttle or closing the throttle it seems to behave the same at the same place in throttle position. Seems to be throttle position driven effect does not matter what gear what speed. It is the same symptom reported since March.

Through a process of elimination removed the float bowl spacer. After spacer removal had a bog 0-1/4 and seemed weak. Incrementally increased pilot jet 3 points now on 45-140 and 2 turns on the air fuel.

Went back through the main jet starting with a 135 then 132 and back down to 130. Going to run around on the 130 and see.

The bucking, stutter hiccup seems to be gone but still not factory smooth. While testing the main jet again it was sputtering but getting better towards the end of each leaner jet. Wondering if the atomiser needs to change if it's sputtery in the mid but cleaning up on the top? Current jet set 120AC BE3 130MJ and 45-140 pilot.

Got a new BR8HS in with the new jet set.
I'll be curious what you get after the main jet is close. My Stella did not like a really rich main jet, I had part throttle issues the same as your having. Once I got closer to a nominal main jet the low end issues cleared up for me.
Molto Verboso
Vespa
Joined: 19 Jun 2007
Posts: 1183
Location: California
Sat May 09, 2020 6:54 pm quote
Christopher_55934 wrote:
hibbert wrote:
The Superstrong clutch is in and seems to be working fine. Few observations, there was a lot of space or rotation of the clutch arm before the push rod makes contact with pressure plate. Concerned about how much push rod exiting cover. Like the looks of the DRT push rod Sime66 referenced on his over the barrel thread. I over tension-ed the clutch cable initially. After adjusting clutch lever has light initial pick up
becoming stiffer deeper into the drawl stiffer than I expected but transferring power much better. Picked up Maxima MTL oil at scooter speed will this be OK?

Tried leaning the scooter over on the rear wheel and kick stand. The drip from the venturi occurs at same place with spacer. This may not be the appropriate test geometry though.

Scooter isn't running so great now after dismounting the PE. Something is wrong 0-1/8 0-1/4 throttle range. Scooter will stutter, buck, hiccup, cut out at what seems to be the cross over point am guessing. Whether it is opening the throttle or closing the throttle it seems to behave the same at the same place in throttle position. Seems to be throttle position driven effect does not matter what gear what speed. It is the same symptom reported since March.

Through a process of elimination removed the float bowl spacer. After spacer removal had a bog 0-1/4 and seemed weak. Incrementally increased pilot jet 3 points now on 45-140 and 2 turns on the air fuel.

Went back through the main jet starting with a 135 then 132 and back down to 130. Going to run around on the 130 and see.

The bucking, stutter hiccup seems to be gone but still not factory smooth. While testing the main jet again it was sputtering but getting better towards the end of each leaner jet. Wondering if the atomiser needs to change if it's sputtery in the mid but cleaning up on the top? Current jet set 120AC BE3 130MJ and 45-140 pilot.

Got a new BR8HS in with the new jet set.
I'll be curious what you get after the main jet is close. My Stella did not like a really rich main jet, I had part throttle issues the same as your having. Once I got closer to a nominal main jet the low end issues cleared up for me.
Could be close but feels like starting over from the start now spacer is gone
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2443
Location: London UK
Sun May 10, 2020 2:20 am quote
Get a WOT plug chop with the 130 main jet. I suspect this might still be a little big. Once the main jet is fully set then do the pilot. The mid range should settle down. BE3 is the weakest to run safely on your set up.

You'll get used to the clutch; its going to be in there a very long time.
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