Vespa variator shimming

Chris Carleton /

Any input on this subject? Just did it and solved all belt slippage and starting issues.

Re: Vespa variator shimming

Tell us more!

Re: Vespa variator shimming

Dirty30 Dillon /

> Chris Carleton wrote:

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

> Any input on this subject? Just did it and solved all belt slippage and

> starting issues.

What belt and variator?

Re: Vespa variator shimming

Chris Carleton /

Bike is a Vespa Boxer running a Dos Cycles house brand variator and a ax 44 belt. Variator seems to be spaced for a scooter width belt.Was very hard to pedal start even with the belt very tight.So made a shim with a washer ground to fit the boss roughly 20 thousands thick. Was able to slack up the belt and super easy to kick over now.

PXL_20211106_194833593.jpg

Re: Vespa variator shimming

Dirty30 Dillon /

There's the reason, the AX belts don't actually work with aftermarket variators. They are too tall and narrow.

Shimming is the exact thing to do tho, so kudos on getting it sorted. I rode your bike back when it was single speed and almost brought it home. Enjoy it!

Re: Vespa variator shimming

Totally normal JBOT /

Shimming variators is a great way to adjust belt tension at 0 variation. I’ve used oil bottle plastic, fiber plumbing washers, etc. just sometimes sucks to assemble when the vari is in the bike to keep the rollers in as you place the shim over the boss between the ramp plate and vari.

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