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Post by RWS74 on Feb 17, 2017 20:25:45 GMT
Wocha folks, I've been riding through winter every day on my PX125 with the following Mods: Piaggio 150 cylinder Sip 2.0 102MJ 45/160IJ AC160 BE3 NGK B6HSR It's been riding really well and I'm getting an average of 70mpg on 30 mile commutes across NW/Central London etc. my only gripe is it seems to four stroke after cold start on choke which resolves after a few minutes of riding though the 1/4 throttle range sounds like it's a bit too rich as if four stroking without the loss of power. I gave my engine a clean up today to get rid of some winter crap and cleaned air filter & checked plug then cleaned it as shown below... there was a ring of oily carbon deposits around the plug on the cylinder head too. Rest of head clean and no oil leaks. What do you reckon folks? It rides so well through all speeds, but could do better at 1/4 throttle....should I down size pilot to 42 or 40/160 or perhaps lean out fuel mix screw even thought it idles really nicely on current setting? Or accept my lot that it runs well other than 1/4 throttle? Ta folks.    |
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Post by pxguru on Feb 18, 2017 14:52:12 GMT
Looks like it is running too rich and too weak!
I would try a smaller pilot 43/140 and a bigger main 105 to start with.
Good to hear someone is still riding in the cold :-)
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Post by RWS74 on Feb 18, 2017 16:38:26 GMT
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Post by andyboi on Feb 19, 2017 10:57:39 GMT
semi related hi jack. i've a 2016 150 px bog standard first vespa. Intend ordering a sip2 and a drilled air filter (possible slide as well) . Reading your thread and some others getting lost in the wilderness with the jetting,would i be right in thinking that taking the px to a rolling road shop (Chiselspeed 3 miles from me) would sort a perfect fuelling ?
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Post by RWS74 on Feb 19, 2017 12:23:24 GMT
Hi Stevie, could be worth doing if you can afford it. I've always tuned my own bikes/scooter at home, partly because of money but I also enjoy it too.
Out of interest what slide where you looking to get?
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Post by andyboi on Feb 20, 2017 0:30:19 GMT
hi rws74. brand new to vespas,bit of a reluctant fiddler with stuff. i'll draw the line at fitting the exhaust then i'll hand it over to Chiselspeed i think. I mention changing the slide only because i've read on the net(so it must be gospel truth) that to help with emissions the standard one has additional cut outs that can cause a flat spot- mine does have a big flat spot at take off that i definitely want rid of-if Chiselspeed can help there without the need of changing it,then fine. Limited info about the required slide but i gather the No.1 is the kiddie to have,then again i have read that folk have ordered this and received a slide looking no different to the existing one ! As i'm sure you can gather i'm out of my depth here so its a sip2/200 filter and a trip to Chiselspeed for me. Whilst you're on, what are your thoughts on an unlimited cdi ?
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Post by RWS74 on Feb 20, 2017 0:39:55 GMT
Ta Stevie, not sure re unlimited CDI on our 150's, I used one on my Triumph Thruxton 900 after mods but that had plenty of refs to play with. Not sure if we have that many revs to play with really or if we would benefit, much less want to go any faster on 10inch wheels. I was more after the low end power and maintain fuel economy too.... hence I did the 150 cylinder conversion from 125. I've heard stuff about the slides but as you say it's difficult to ascertain exactly which one to get.
Be good to hear how you get on mate.
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Post by andyboi on Mar 12, 2017 13:40:16 GMT
here's where i'm at..had delivered a sip road 2 a drilled air filter and three jets 104,106,108 to try. my question is, with my px150 having less than 200 miles on it,is it a waste of time plug chopping for now ? i've jacked in the idea of swapping the slide after reading mainly negative posts about doing so(one interesting one mentioning blanking a doughnut shaped hole in the air filter to achieve same effect though).would you wait until the motor has 500 miles under it or 'just do it' as the missus always says !
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Post by jedihunter on Mar 12, 2017 16:22:31 GMT
I'd do the plug chops. It would be a shame seize a motor with 200 miles on it!
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Post by andyboi on Mar 12, 2017 16:48:41 GMT
thanks for the quick reply, what i was meaning was, should i not fit the parts until 500 miles have gone by? having said that, with the weather looking up,i want to fit the stuff straight away now. inevitable jet question- starting with a 108 be ok with my spec (bog standard 2016 150,sip r2 and drilled filter)?
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Post by jedihunter on Mar 12, 2017 17:15:03 GMT
Ahh, that makes more sense. I'd fit the new stuff now, because I get impatient when new "toys" show up in the mail. As for the jetting, afraid I cant be much help,as I've had no experience with such a new scoot, Try the search, I'm sure a similar setup has been posted about. J.
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Post by doulsy on Mar 12, 2017 19:19:38 GMT
glasgow summers are like london winters  get the shivers in july up here on your scooter lol |
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Post by pxguru on Mar 16, 2017 3:09:48 GMT
How you getting on with this jetting? Any better?
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Post by andyboi on Apr 24, 2017 20:31:36 GMT
not checked in for a while but here's where i'm at today-fitted sip2 drilled filter and the 108 main jet. taking it for a ride found the thing constantly stuttering(four stroking ?) at quarter throttle. do you reckon its an idle screw adjustment that's needed ? should i ignore for now and prioritize sorting the correct main jet first? cheers for now
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Post by phattanglo on Apr 25, 2017 14:14:09 GMT
The consensus is that the slide on the later px has the notches in the slide to make it run leaner for emissions, but as you are already experiencing 4 stroking I suppose the No 1 slide will run even richer.
Do Chiselspeed reckon they can sort the jetting throughout the entire rev range?
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Post by andyboi on Apr 25, 2017 17:45:07 GMT
change of heart/fortune,i'm jetting it myself.will call to chiselspeed only if i am not happy with my own efforts.did not bother with a slide as i read too many conflicting reports. i gather from your reply i'm way too rich already with the 108 ?
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Post by phattanglo on Apr 26, 2017 14:01:03 GMT
It's a dark art not meant for us mere mortals, but I always got the impression that jetting in the lower rev range influences the mixture at wot but not vice versa. In other words your idle jet,slide and be? need to be right and then the finishing touch is the main jet.
Please heed the advice offered by the more learned chaps on here as they know more than we'll ever know.
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Post by RWS74 on Apr 26, 2017 22:13:40 GMT
change of heart/fortune,i'm jetting it myself.will call to chiselspeed only if i am not happy with my own efforts.did not bother with a slide as i read too many conflicting reports. i gather from your reply i'm way too rich already with the 108 ? Hi Steve, I tried 114, 110 & 108 and all were too rich and four stoked. I settled on a 102 and mine runs really well pulling from stationary to 60mphish with no hesitation or four-stroking. I looked into getting a slide & even though the Haynes manual lists a different slide number for our 2011-2016 PX 125 & 150 the PIAGGIO parts site at dealers shows the same part number so I didn't change it. |
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Post by andyboi on Apr 28, 2017 13:01:36 GMT
cheers RWS74, still have a 104 and 106 to try,have to wait for my next day off work though. quick chop question- better to kill ignition at WOT then pull clutch or pull clutch whilst killing ignition with the throttle closed ? is this being pedantic or is it crucial or am i missing a limb ?
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Post by RWS74 on May 3, 2017 9:20:40 GMT
cheers RWS74, still have a 104 and 106 to try,have to wait for my next day off work though. quick chop question- better to kill ignition at WOT then pull clutch or pull clutch whilst killing ignition with the throttle closed ? is this being pedantic or is it crucial or am i missing a limb ? Hi Stevie, Re Plug Chop.... no idea mate, so long as you don't fall off in the process then I reckon you're doing the right thing! |
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Post by RWS74 on May 8, 2017 20:53:26 GMT
Boom! 92MPG! 30 mile a day commute across north west/central London & not missing a beat.
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Post by bignico2411 on May 9, 2017 8:18:24 GMT
cheers RWS74, still have a 104 and 106 to try,have to wait for my next day off work though. quick chop question- better to kill ignition at WOT then pull clutch or pull clutch whilst killing ignition with the throttle closed ? is this being pedantic or is it crucial or am i missing a limb ? This is what I've always done, Stevie. As advised by H, one of our resident gurus, ride the scoot until warmed and find a decent stretch of road where you know you can go WOT for about 60 seconds. One thing to note, the plug will be hot, so stick a heavy glove in your glovebox. |
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Post by andyboi on May 9, 2017 17:59:02 GMT
thanks bignico, unlike RWS74 i'm a cold weather coward,should manage my runs this week(weather permitting of course)
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Post by andyboi on May 13, 2017 20:23:47 GMT
please bear with me with this post. i realize my questions are pretty basic and boring but would appreciate guidance.Recap ,2017 PX150 fitted Sip Road 2 and pre drilled air filter. Had a look at the standard plug before the upgrade and it looked like photos i've seen on here resembling a good colour. Did the upgrades fitted a 108 main and noticed an improvement in power,easier starting but occasional drop off of power at high revs-i took this to mean it was too rich(did not look at the plug !)Today i fitted a 106 main and rode 4 miles at wide open throttle up the A1(M).Pulled in the clutch,killed ignition coasted to a stop off the A64 junction and photographed the plug  it ran perhaps a little better hitting a GPS'd 65mph(downhill). Next up the 104 main. Couldn't notice any change,ventured onto the A1(M) but this time at WOT and touching 65mph i suffered a slight drop off of power-lack of fuel sensation or...could it be really really bad news? I closed the throttle spoiling the test somewhat but here's the pic of the plug with the 104- I cannot see any difference !  If the day couldn't get any worse,the leak from the carb area has re appeared- on a machine that's not covered 400 miles in total !!  Refitted the 106 for now. Bit deflated here. Ste |
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Post by RWS74 on May 13, 2017 22:17:40 GMT
Hi Stevie, sounds like you're going the right way with your main Jetting.
Just out of interest how did you differentiate between the two drops in power & decide that one is too rich and one is possible lack of fuel?
I wouldn't worry too much re the leak. I had a similar episode with mine that seamed to resolve itself without interference... I think there's an overflow near there which can cause such stains etc.
Keep up the good work
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Post by andyboi on May 13, 2017 22:43:05 GMT
i haven't a clue RWS.just guessing based on not finding any posts of anyone using a 108 or more with our set up. I pray the drop in power with the 104 wasn't a 'soft seize' i dread,just hope it was a lack of fuel baring in mind the motor was straining at 65.Then again, the 106 did see the same speed without issue.
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get the shivers in july up here on your scooter lol
