Topic: 1981 CB650C Front Brake Seal

[TimLoon]

Uncovered the bike from its long winters nap.
Unfortunately, there was a small brake fluid puddle on the front wheel, right side.
Looks like it is leaking from the oil seal which is original.
Best place to purchase new seals and boots? Any help with part numbers?
Also, the fluid of course took the paint off the caliper. Will need to refinish when off. Recommendation on rattle can paint?
Amazing thing is there is still solid pressure.
Bike still only has 3K miles but hope to ride more when I retire next year.
Tim

[Kelly E]

I use Seymour MRO rattle can paint for the brake calipers.
I actually painted my entire 74' CB 550 K0 with it. It says gas and chemical resistant on the can. I've spilled gas on the tank and it just stripped off the wax. My buddy wet sanded the tank and side covers. The only drawback is you need to let it dry for a long time, like at least a month minimum.

[fizzlebottom]

https://www.partzilla.com/catalog/honda/motorcycle/1981/cb650c-a-650-custom/front-brake-caliper

The piston seal is available. #7 on that list. If that leaked you'll probably want to replace your pads too in case they were contaminated.

[Stev-o]

Any help with part numbers?

FYI - below is a link to the parts fiche for your bike, bookmark it.
Then when needing a part number, look it up on the fiche and then use the part number to do a search to find it.

https://www.partzilla.com/catalog/honda/motorcycle/1981/cb650c-a-650-custom

https://letmegooglethat.com/?q=+45108-300-003

[bryanj]

The seal rarely goes bad all on its own, usually get damaged by pitting on the piston so bank on changing that as well, a stainless one if you can get one would be the best

[Kelly E]

We've had really good luck sourcing stainless steel caliper pistons from brakecrafters.com

[TimLoon]

Thanks folks.
As soon as my crazy schedule allows, will get into this project.

[TimLoon]

Following up to let folks know how things worked out. Ordered complete kit with piston as old piston had some pitting.
Kit installed no issue except that the boots with the kit did not fit as well as the originals. Original boots were still in good shape so stuck with them.
New fluid, brakes bled and holding pressure with no leaks.
Thanks for the advice and help getting this project done.