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this fork sucks.

1427 Views 13 Replies 9 Participants Last post by  texmawby
so i rebuilt my cb550 forks. im pretty sure my springs are totally clapped out. there is about 1.5" of sag when i unweight it and then let it drop. then when i sit on it another probably 3/4". i put a zip tie on the tube and it bottoms pretty easily under moderate braking. and i have noticed it sometimes crunches pretty hard in some of our nice city potholes. im running 145cc 10 weight. like the book says. how much of a difference are my new springs going to make??? anyone??? or will it still have that crappy mush feel?

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Heres the deal on your front brake. Both the pivot and the caliper are the problem. First, remove the whole mess from the fork. Then drive the pivot pin out and clean the corrosion off of it and out of its hole. Grease it up and put it back together. I usually used white lithium grease cause I had lots. I don't think the kind of grease is critical. The most likely scenario with your caliper is a build up of gunk behind the o-ring in the caliper body. So, with the caliper apart and the brake pads out, but still connected to the master cylinder pump the piston out of the caliper. It is messy but it works. Next take out the o-ring. It is supposed to be square and so is the groove it rides in. The gunk is causing the o-ring to be too tight and dragging on the piston not allowing it to retract. I scrape the groove clean with a pick and replace o-ring if it is the least bit suspect. I generally run without the weird adjuster screw and spring. If everything is working the caliper just floats where it is supposed to be. All in all it is just routine maintainance on these caliper systems.

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