Re: Vespa Exhust+air filter+upjett - question

Chris Rice /

Sounds to me that you put a huge expansion chamber on a stock 49cc top end with a tiny 12mm SHA carb. You will never hit the power band and it's going to suck balls on hills with that pipe unless you go big on the top end and carb/intake, which in your case, you would need new racing cases or be a good fabricator... You would have been better off with a circuit pipe...

You ARE probably running lean, but you will still never hit the powerband of that pipe with everything else stock...

I was running a proma circuit on my Grande with a modded airbox and I want to say my main was at 68 or something... Start at 70 and work your way down. It will have more power if you are jetted correctly, but that is too much pipe for your setup imho...

Hope this helps.

Subject Written By Posted
  Vespa Exhust+air filter+upjett - questionTopic by: Eran Eran 01/06/10 02:04PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Tate Tate 01/06/10 04:28PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/06/10 04:56PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Jamesg Jamesg 01/06/10 05:03PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Organ Robbin' Organ Robbin' 01/06/10 05:10PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/06/10 05:21PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Organ Robbin' Organ Robbin' 01/06/10 05:23PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Tate Tate 01/07/10 12:22AM
  Re: Vespa Exhust+air filter+upjett - questionRe: Chris Rice Chris Rice 01/07/10 02:25AM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/07/10 04:32AM
  Re: Vespa Exhust+air filter+upjett - questionRe: Chris Rice Chris Rice 01/07/10 02:29PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/07/10 02:58PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Organ Robbin' Organ Robbin' 01/07/10 03:02PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Chris Rice Chris Rice 01/07/10 03:58PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/07/10 03:34PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Chris Rice Chris Rice 01/07/10 04:07PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/07/10 04:15PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Organ Robbin' Organ Robbin' 01/07/10 04:19PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Eran Eran 01/07/10 04:23PM
  Re: Vespa Exhust+air filter+upjett - questionRe: Organ Robbin' Organ Robbin' 01/07/10 04:25PM
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