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so i got my supermoto rims off and my dirt rims on. haven't ridden it but just pushing into the garage I noticed the brakes really aren't gripping very well. (the dirt rims have their own brake disks. I am assuming its just cause those rotors haven't been buffed up by any brake pads for at least 3 years. I'm assuming after I give a couple good squeezes on the brakes the pads should start to grip on the disks. am I right or do i need to look into something else not being right?

They've probably got some residue on them from sitting around. I would just be carefull for the first couple corners.

I routinely get WD40, tire foam, soap, aluminum polish...you name it on my discs every wash. Brakes don't work for two laps.

your supermoto wheels have over sized disks?

I'm thinking the difference you may be feeling is the larger diameter wheels with a smaller rotor
+ your pads need to wear in the the other rotors

90cr500guy wrote:your supermoto wheels have over sized disks?

I'm thinking the difference you may be feeling is the larger diameter wheels with a smaller rotor
+ your pads need to wear in the the other rotors

Im running stock disks on my supermoto wheelset. I dont race I street ride it and I have never had any brake fade so i dont see the need to spend money on a big front brake kit. and yeah like i had to squeeze hard to ge tthe bike to stop without me sitting on it while pushing it on a flat driveway, but ive got 10 acres of fields & lawn at the house ill putt around and stop frequently this weekend & see if that doesnt get the residue off the rotors. I dont know if the rotors are worn more or less but the brakes should automatically ajust to a different width rotor right? there was no problem getting the calipers/pads over the disks so if anything these rotors might be more worn. it is a 1990 and these rims are by no means new. the whole thing was done a while back frame-off when it was switched to supermoto and I think a new crate engine (as well as upgraded 91+ subframe/seat/airbox & new plastics. I believe the rims are the originals.

the previous owner was in his late 30s and bought it after getting a divorce. his nephue met me to make the hand-off in PA half way between OH & CT. he said it rarely got ridden. really an amazing deal. bike is like new as well as engine, came on 17s on excell wheels & a dirt rim set, extra front fender and extra seat cover to match the nstyle graphics, street motorcycle title, lighting coil lights, etc all for 1700 bucks out the door...

I shouldn't ask but...did you pump the brakes first? Anytime you change a wheel the caliper's pistons get pushed out a little. When you reinstall you gotta pump the brake a couple times to tighten the pistons back up.

And if there is some kind of residue on them, put putting around the house may not work very well? As I mentioned above my brakes frequently don't work for the first two laps at race speed. If I just farted around all day they may never work? You need to build up a decent amount of heat and friction. If you've got the space get the bike up to speed (like 40-50mph) and do a long but hard stop. Once or twice is all it should take.

MICK wrote:I shouldn't ask but...did you pump the brakes first? Anytime you change a wheel the caliper's pistons get pushed out a little. When you reinstall you gotta pump the brake a couple times to tighten the pistons back up.

And if there is some kind of residue on them, put putting around the house may not work very well? As I mentioned above my brakes frequently don't work for the first two laps at race speed. If I just farted around all day they may never work? You need to build up a decent amount of heat and friction. If you've got the space get the bike up to speed (like 40-50mph) and do a long but hard stop. Once or twice is all it should take.

I didnt pump them, and its still street legal and i have a 3 acre field so ill go out and hammer on the brakes for a bit when i get it out and see if that does it...

doin the changeover... will get some shots uploaded onthe weekend of the final product