Re: Project - CB Cafe'-R (1982 CB750 F)

Posted by Re-run on Apr 29, 2014; 6:27pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Project-CB-Cafe-R-1982-CB750-F-tp4050452p4050576.html

Brakes are simple. Take the calipers off the rotors first. Then while over a bucket, pump the handle to force out the pistons. Bucket is for the fluid of course. Open the top of the master and slowly pump a couple more times and most of the fluid should be out.

Disconnect the lines from the calipers and master and inspect those, likely they will need replacing. A local hydraulic shop should be able to make new lines for fairly cheap. I got my from http://www.helperformance.us/motorcycle/ they are very nice lines.

the manual should show how to remove the piston in the master, do this and clean it out, paying attention to the small return holes. Rebuild if needed.

You already have the pistons out of the calipers so clean the housings now. Remove the o-ring seal and make sure you carefully clean that groove. Corrosion builds up in the groove and will prevent the piston from retracting properly. Make sure the rest of the housing is clean. Clean and inspect the piston. Major pitting will require replacement. Minor pitting and flaking is usually fine. Get a new seal and put it in, then install the piston.

Get everything back together and on the bike and grab a big bottle of brake fluid. May as well use dot4 since it is better than 3. At this time, bleeding can begin.