Re: Vespa Tuning/Gearing Q's

Jeremy Edwards /
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I have a ciao with polini 63 kit including head, proma circuit exhaust, modified casings and crank, malossi variator and belt, 13 carb and I find that I can't go above a 60 jet in the carb, mine runs best with a 58 and I can get 38-40mph but it is screaming at that and you certainly couldn't hold it at those speeds for long without doing damage but I do find it's got good acceleration and plenty of power for hills and will cruise fairly comfortably at 33 though, I actually expected an easy 45 with that set up but there is no way it would ever get to that with standard gearing. I think a 70+ jet is huge for that set up and think you could possibly have an air leak somewhere, as I said mine runs best on a 58 with a 70+ it wouldn't even idle without having the screw nearly all the way in, the instructions for my kit states that it works best with jets between 52 and 56 and I find that a 58 just gives it a little more power without sacrificing top speed which to me that indicates my engine is working as it should and the fact you are on such a big jet further confirms to me you have a leak somewhere, most likely at the base of the barrel but other possible areas to check are the joint in the engine casings and the oil seal behind the points, I also had the same issue with the variator only going 3/4 of the way and I modified it so it now runs to the top but in all honesty I didn't think it made a noticable difference so I wouldn't blame that for now. I will be interested to know if you have managed to get any further forward with yours?

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  Vespa Tuning/Gearing Q'sTopic by: Jarod V. Jarod V. 10/18/20 11:22PM
  Re: Vespa Tuning/Gearing Q'sRe: - Joe - - Joe - 10/19/20 08:42AM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 10/19/20 12:01PM
  Re: Vespa Tuning/Gearing Q'sRe: - Joe - - Joe - 10/19/20 12:41PM
  Re: Vespa Tuning/Gearing Q'sRe: pat splat pat splat 10/19/20 01:06PM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 10/19/20 03:51PM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 11/30/20 01:55PM
  Re: Vespa Tuning/Gearing Q'sRe: Jeremy Edwards Jeremy Edwards 11/09/20 05:46PM
  Re: Vespa Tuning/Gearing Q'sRe: pat splat pat splat 11/09/20 05:58PM
  Re: Vespa Tuning/Gearing Q'sRe: EH FCC of the QCB EH FCC of the QCB 11/09/20 08:43PM
  Re: Vespa Tuning/Gearing Q'sRe: Graham Motzing Graham Motzing 11/09/20 08:46PM
  Re: Vespa Tuning/Gearing Q'sRe: Jeremy Edwards Jeremy Edwards 11/10/20 04:12AM
  Re: Vespa Tuning/Gearing Q'sRe: Dirty30 Dillon Dirty30 Dillon 11/10/20 08:31AM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 12/10/20 09:02PM
  Re: Vespa Tuning/Gearing Q'sRe: todd amundson todd amundson 12/10/20 11:35PM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 12/25/20 04:43PM
  Re: Vespa Tuning/Gearing Q'sRe: Declan g Declan g 12/14/20 10:13AM
  Re: Vespa Tuning/Gearing Q'sRe: Jason ( ͡° ͜ʖ ͡°) Jason ( ͡° ͜ʖ ͡°) 12/26/20 02:52PM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 12/29/20 06:16PM
  Re: Vespa Tuning/Gearing Q'sRe: Jarod V. Jarod V. 01/03/21 01:54PM
  Re: Vespa Tuning/Gearing Q'sRe: . Chudas. . Chudas. 01/03/21 02:14PM
  Re: Vespa Tuning/Gearing Q'sRe: - Joe - - Joe - 01/03/21 03:08PM
  Re: Vespa Tuning/Gearing Q'sRe: Matt Grantonic Matt Grantonic 01/06/21 12:26AM

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