On a bike that old replace friction and steels. Just be sure to soak the friction plates in whatever oil your planning on using overnight. I would go with the yamaha brand vesrah's had problem's but I can't remember what problem's exactly. Jefi have a 78 yamaha 175 it with a bad clutch i have a few questions
1. do i just need to replace friction plates or steel plates to?
2. i can get yamaha brand or vesrah which would be better?