I've been fighting this since I got my CB400F. As far as I can tell, it's a compound problem. Here is my list of causes: 1)clogged return valve/oriface in the MC. I don't know how, but if there is any crud of any type anywhere in the system, it will work it's way up to the MC and clog the oriface. Just rebuilding the MC won't do, because there is still the rest of the system. MC, caliper, lines (including through the light switch) must be cleaned all at once. 2) the pivot arm must be lubed and moving smoothly, and the brake must be adjusted correctly. If the pivot arm locks, or anything (mis-alignment?) allows the brake to drag, it gets hot, and cooks the grease around the puck. It also may expand or warp the puck/ promote faster oxidation. I have been planning on experimenting with silicone fluid next time I rebuild one of these brake systems.
I once bled a honda system until the fluid ran clear and still had problems. When I took apart the MC, it was still full of crystalized fluid/oxidation/unnamed crap; it looked like beach sand. The only solution I know, and it still isn't a 100% guarantee, is to rebuild the entire system, pivot and all, as clean as possible. [EMAIL PROTECTED] wrote: > Guys, I'm getting tired of whanging the front wheel calipers with a plastic > hammer to loosen them up before I ride. Seems as if the bike sits for no > more than a couple weeks before they start binding again. I might get a few > more weeks relief by taking the active side off, scraping out the pad > recess and cleaning off the OD of the pad backing, but that's tiresome too. > We all know that isn't uncommon on earlier Honda calipers, the ones mounted > on the hinged hanger, and it must have been happening to otheres onlist > from time to time. So I'm looking for the cure, the ultimate cure. What can > we do to make these things stop hanging up? > > Regards, Hoyt McKagen > > Please update bookmarks: > Belfab CNC - http://belfab.freeyellow.com/belfab.html > Best MC - http://batwings.freeyellow.com/best.html > Camping/Caving - http://batwings.freeyellow.com/caving.html > Two-Wheel-Tech List - http://batwings.freeyellow.com/2whfaq.html > The universe was not created by God ... the universe *IS* God
