Polini high Speed - Kymco Super 8 4 stroke

[waqr]

I`m about to install this in my scooter but noticed that the drive boss i 39mm long compared to 38mm of the Kymco original drive boss. This I guess means that I will get 1mm less splines to use on the crankshaft. As I can see there is already a tight fit with the 38mm boss so I am worried that I will strip the splines when using the longer drive boss.

Can I use the Polini kit with my stock boss?


www.twostroke.se/product.asp?product=14123

[kagetenshi]

It shouldn't hurt to use the shorter drive boss.

[90GTVert]

You can add spacers where needed. You can put a spacer on the end of the boss if you want to go back to 39mm, but it will need to be an OD the same or slightly under that of the drive boss. If you want to try the shorter boss, then you can add a spacer/washer on the outside of the front pulley if needed so you don't create any issues with splines.

[waqr]

Thanks for the replies!