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RJC

front brake drags

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Front brake drags a bit spinning the wheel with bike on the stand. Should i be concerned and tear caliper/piston apart now? Rebuild?

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Hold the front brake on to extend the pistons and spray the caliper with brake cleaner. Spin the wheel and apply brakes a couple of times. If the piston was a little sticky with grim it may clear up.

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Start with a good flush. A slight rub is normal but does it slow down wheel fast? like a 1/2 a turn? Spin a coupls times first to get pads to spread a litle then see how fast it stops . Anyone else to compare it too? if I get mine up on stand I'll check for you, but presently my back is out & I lift my bike up on stand.

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Thanks for the input, guys. Yeah, please let me know how yours compares, Bork. I'll pic up some brake cleaner tomorrow and try that first.

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OK, As fast as I can manually spin by hand.= 4-41/2 turns . I put a piece of masking tape band thru spokes around rim & tire, so I could plainly see number of revolutions. Hope this helps. I think this mine is normal?

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Thanks Bork, mine makes about 2 turns. I think I'll just tear into it. Getting the manual out.............

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Some drag is normal--the pads should be kissing the rotor. Some pads drag more than others when their just kissing (or full-on braking for that matter).

I'm getting about 3 1/2 turns out of my 02' XR650R with new wheel bearings and an EBC big rotor kit. EBC pads too, I think. You can certainly feel the friction but I don't think there's much to do about it. My 95' CR250R goes more like 7 or 8 turns [shrug].

Years ago I had a CBR900RR with dual 4 piston calipers. They had what I thought felt like excessive kissing friction. I rebuilt everything with little change. I eventually came to the conclusion that the EBC HH pads I was running was the cause. The pads performed well enough that I ignored the brake drag. I figure what feels like a lot to your arm is probably only eats a small fraction of 1 HP.

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hehehe , maybe I spin faster? BTW my rotor is slightly bent which may cause the puks to spread out alittle from the wobble action.

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'98 XR650L

Anyone know exactly what I need to buy to refurbish my front brake caliper?

It sticks pretty badly. Is it necessary to replace it instead?

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