> Jonathan Bennett Wrote:
> -------------------------------------------------------
> > Erik Thalman Wrote:
>
> > -------------------------------------------------------
>
> > I've got almost same set up but with a proma GP on it and rito crank
>
> > jammer clutch hitting 38 on stock 16x45 gearing
>
> Looks like about 8200 rpms. What's a safe number for a stock crank?
Don’t really know what’s safe, many puch cranks don’t even have a needle bearings in the bottom big end of the crank con rod just a bushing and there is only two tiny little slots for oil/gas mix to get in there,
The only real safe rpm and horsepower is stock configuration,