1973 Yamaha ct-3 175. Transmission dia shows part #93315-31502 will fit #8 and #32. It will fit #8 but not #32. The diameter is to small for #32. The original fits tight in #32. I saw a post on this awhile back but can’t find it now. Finding the correct part # would be appreciated. Couldn’t figure out how to send video, but here are some pictures.

Is the outer diameter to small for the case and does the 93315-31502 fit the transmission shaft?

93311-31507 has the 23mm OD used on later models.

  

 

Yes, The OD is to small for case. It does fit transmission shaft. Thanks Adguy for your response, and if you can send me in the right direction to purchase new one it would be appreciated.

Thanks Mark T for all that info I now have to find that part. Do you think SKF bearings might have the size I’m looking for. Or do you think if I call Yamaha they would know. The Yamaha shop in my town gave me there #. Or do you know were I can find one. Thanks for great input.

Thanks Mark, calling around and I was able to find some. I purchased 3. I will be putting this info into my shop manual. Thanks again 

Sounds like Mark T sent you in the right direction for the part. Seemed they were available on Partzilla for about $16. I needed one myself and found one on E-Bay. It was a used bearing but this is a Hail Mary for a spun bearing for the #8 replacement where the case was rounded open enough to make the correct size bearing loose so I wanted to see if this would work before buying a new right side center case. Your post was well-timed. Good luck with your build.

Just wanted to say how glad to see your post on the bearing size change in the 73 CT. The slightly larger bearing arrived today and fit perfectly. I was considering splitting the case And replacing the right side of the case or keeping this as a parts bike. Now I have a viable bike to start restoring. Unfortunately I’ve already used some parts on two other CTs. Oh well back to sourcing.