Slow derbi variant pp??

Bike runs very well idles well and has a lot of low end power... pulls solid up to 30 mph... it’s not reving up like I believe it should won’t rev on the stand very high... all stock other then shaved Restrictor off the variator 15:15 carb no intake Restrictor has custom Variator weights 3.5 grams lighter then stock not sure where to go from here stator is in the Original spot from the factory cleaned out the pipe also what I’m getting at here is why won’t it rev like I believe it should should be closer to 40 at least !

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Re: Slow derbi variant pp??

Dirty30 Dillon /

Stock derbi PP's typically go 30. Sounds like you have succeeded.

Re: Slow derbi variant pp??

try a new exhaust

+8 mph

Re: Slow derbi variant pp??

Yeah new pipe. I like an estoril on stock derbi’s

Re: Slow derbi variant pp??

> Daniel '' Wrote:

> -------------------------------------------------------

> Yeah new pipe. I like an estoril on stock derbi’s

This or a proma

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