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Honda CB 750 discussion forum:RE: Front Brakes? |
| RE: Front Brakes? |
| Jim Gushue said 2005-12-07 04:56 |
| I have had a lot of experience with this. The caliper should be removed and the piston pumped completely out using the master cylinder if it it still working. I have had to use force to get these out in most cases. I have fashioned a fitting to go in the inlet of the caliper that will accept a compressed air quick connect to pump the piston out using compressd air. Use a box of rags or something to catch the piston if it comes out suddenly under pressure. You don´t want to catch the piston yourself for obvious reasons. I have also had to have a local heavy machinery dealer pump one out using a hydraulic fluid system that produced some serious pressure and pushed the thing out. The seal is located in a groove on the inside of the caliper. It is a rubber "o" ring and was available from my local Honda dealer the last time I needed one. I don´t think it was more than $10. The caliper wil need to be cleaned up. Get the rust and crap out and clean the grove that the "0" was in. An allen key may be useful in cleaning this. Don´t score it. Be somewhat gentle. The "O" will need to be replaced and smeared with brack fluid. The piston, once cleaned ,will need to be slid into the caliper. I put a little high temp grease on the inside surface of the caliper.It allows good movement for the pad. Clean the outer edges of the pad and sand the surface of the pad to remove the shiny surface. I Clean the surface with brake cleaner after. Return the pad to the caliper being careful to keep your greasy fingers off the surface. Return the caliper to the bracket. Adjust the caliper so that the inside pad is almost touching the inside of the disk. Refill and bleed the system. This is another problem to conquer. I attach a large syringe to the bleeder valve with some tubing and I suck the fluid down from the Master cylider rather than try to push it through using the master cylinder. Having said this , there is no substitute for a service manual. I have a Honda Manual, a Clymer, a Haynes, a microfische parts card and the JB Nicholson Modern Motorcycle Mechanics Book as references. I also joined the SOHC Honda discussion group at http://www.honda-sohc.co.uk/ Good luck Jim Gushue NS Can 1973 CB 750K |
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