Benjoi87 Posted January 8, 2009 Report Share Posted January 8, 2009 I have a 20" Onza Comp 09 model with HS33's, i recently bought a brake booster and it was shipped with spacers and bolts (4 bolt booster for my 4 bolt brakes). Only problem is that im a noob and have no idea how to fit it now that i have it... please help as i want to get it on ASAP before i lose the bolts :| thanks people. Quote Link to comment Share on other sites More sharing options...
Robwalker Posted January 8, 2009 Report Share Posted January 8, 2009 If you cant look at it and work it out. Take it to a bike shop. Quote Link to comment Share on other sites More sharing options...
psycholist Posted January 8, 2009 Report Share Posted January 8, 2009 Initial fitting of 4 bolt boosters is a bit fiddly because you have to deal with both sides of the brake at once. I've done it without the rubber band trick and it's a bit messy - very easy using this method though:1. Set your brakes up aligned to the rim with no booster.2. loosen the bolts both sides of one piston until they're about a turn from coming out and hold the piston in position by hand.3. Hook a rubber band around the front of the brake block, stretch it around the brake mounts and frame and loop the other end around the back of the block to hold the piston in position. Do the same for the other piston. (Having the bolts loose before you put the rubber band on makes it easier to get tension in the rubber band even so it doesn't move the piston when you let go of it).4. Remove the current short bolts - the rubber bands should hold everything in place.5. Put one of long bolts that came with your booster through a hole in the booster.6. Slide a spacer onto the bolt (Spacers go between the booster and the clamps for the piston), then thread it into the frame. Do the same with the three other bolts.7. tighten everything up, making sure the spacers are long enough to keep the booster from touching the clamps on the frame (On my booster they were very slightly too short, so I added a couple of extra washers between the spacer and the booster.8. Remember that since the braking load is distributed between both the bolts that hold each piston you should tighten the bolts alternately until they both come to an equal tightness rather than tightening one the whole way and then tightening the second (Same goes for stem bolts, wheel nuts in a car etc.). Quote Link to comment Share on other sites More sharing options...
Benjoi87 Posted January 8, 2009 Author Report Share Posted January 8, 2009 Initial fitting of 4 bolt boosters is a bit fiddly because you have to deal with both sides of the brake at once. I've done it without the rubber band trick and it's a bit messy - very easy using this method though:1. Set your brakes up aligned to the rim with no booster.2. loosen the bolts both sides of one piston until they're about a turn from coming out and hold the piston in position by hand.3. Hook a rubber band around the front of the brake block, stretch it around the brake mounts and frame and loop the other end around the back of the block to hold the piston in position. Do the same for the other piston. (Having the bolts loose before you put the rubber band on makes it easier to get tension in the rubber band even so it doesn't move the piston when you let go of it).4. Remove the current short bolts - the rubber bands should hold everything in place.5. Put one of long bolts that came with your booster through a hole in the booster.6. Slide a spacer onto the bolt (Spacers go between the booster and the clamps for the piston), then thread it into the frame. Do the same with the three other bolts.7. tighten everything up, making sure the spacers are long enough to keep the booster from touching the clamps on the frame (On my booster they were very slightly too short, so I added a couple of extra washers between the spacer and the booster.8. Remember that since the braking load is distributed between both the bolts that hold each piston you should tighten the bolts alternately until they both come to an equal tightness rather than tightening one the whole way and then tightening the second (Same goes for stem bolts, wheel nuts in a car etc.).Thanks so much dude, Just fitted it that way and it worked a dream... used a hairband instead but its all the same lol. Cheers anyway... An much more helpful that the retard above... just wanted to say thanks anyway. Quote Link to comment Share on other sites More sharing options...
psycholist Posted January 8, 2009 Report Share Posted January 8, 2009 No problem - glad to be of help . Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.