KZ750 Starter clutch gear diameter - please help

Hi from Czech republic,

I need new starter clutch gear for my KZ750B3 1978 (pn 21170-003). It is impossible to buy it. Now I want to make it, but I dont know accurate diameter (0,00 mm). Does anyone know it?

Thank you for help and sorry for my english

What part of the gear is damaged?

Sorry for my late answer.

The damaged part is the one which runs on 3 rollers in the clutch assy, See the picture I sent in my previous post.

The gear I have has some wearing and scratches. and that's why I can not measure the accurate diameter. According to my information, the diameter must be very precise.