Question about 1981 cb750c brake caliper

[avoca]

Hello

First post

Normally, I peruse the forums to find answers for my questions, but I couldn't seem to find one so I made an account and decided to ask!

Anyway, I am rebuilding an 81 750c brake caliper and I'm in need of the rubber seals / o-rings / pistons and I can't seem to find anything BUT the piston online!  Does anyone know of a good place or a different year that will have the rubber seals/dust boots for this model year caliper?  The caliper requires 4 dust boot thingies PER caliper and all the other ones I've seen are only 2 or 3.  Thanks!!

[shinyribs]

I ran in to the exact same issue. I had an '81C front end I wanted to use but nothing was available online for that year-specific setup.

My local parts guy was able to find all the parts laying around all over the country ( literally), but the cost ended just being silly.

If memory serves, having to basically buy every seal, clip, etc. separately, it was going to be close to $250 to go through the calipers and install new pads. And I didn't need any pistons.

I eventually just installed a completely different front end.

Sorry for the bad news. Good luck on your search. If you do find something please report back. Pleeeeease!!

[avoca]

Haha I will!  I was actually reading the thread where you were posting in a few years ago about how you bought a 78f rebuild kit and how everything worked except the dust seals.  I'm assuming you didn't get them to work?  I'm going to a local guy tomorrow who sells vintage cb750 parts so I'll let you know what I find!

I'm assuming I can i can make something work with other year models' seals (I think/hope).  My bike is acutlaly a '73 but I bought an 81 parts bike and stole the front end.  I'll keep ya posted!

[Re-run]

Just a thought, but are the 81 K and F calipers that different? How about other years, 79, 80, or 82?

Maybe check on bike bandit. They have exploded diagrams and have part numbers, granted it is their part numbers but one could check to see if the part numbers they use are the same across a few years and then maybe find what you need.