Belts sizes

[brookespeed]

Does anyone know that specifications of the belts for Minarelli (long and short if they are different), Honda, and Piaggio 50cc engines? Circumference and width? I found a strange belt in my stash of parts that was for a yamaha but was far to short for the engine that I should have had it for. I have a collection of honda and piaggio belts as well that I'm not sure about the sizes. And what about the overange belt sizes?

thanks!

BGK

 

[Mexicano]

Well my scoot uses 12 m.m. x 800 m.m. it has a minarelli 100 c.c. (Yamaha)