So the rear master cylinder on my 85 250r is seized... does anyone know of any tricks to get it moving again? Or does it have to be drilled out and an aftermarket piston kit bought?
So the rear master cylinder on my 85 250r is seized... does anyone know of any tricks to get it moving again? Or does it have to be drilled out and an aftermarket piston kit bought?
Mixing gas and haulin' ass
1984 ATC 70 x2
1985 ATC 250R-Ported/Polished, PWK 39mm, V-force 3's, Outerwears air box lid, FMF fatty with DG silencer, DWT wheels, LSR +4 axle, all black plastics
1985 ATC 250R-stock
Got a compressor? Remove the caliper and snug a bolt in the brake line fitting hole then shoot air into the bleeder hole. Get some rags and cover the caliper so it won't shoot off into space. I usually take a couple dish rags, wrap them around my hand and hold the piston as it is coming out. Make sure to point it away from your face, children and pets
You could try to soak it in cider. Ahhh ha. I'm just bein' serious.
What do you mean drilling?... Do you have access to a sonic cleaner?
I'll have to give that a try yaegerb don't know how successful it'll be, when I pulled back the boot there was rusty water and she's pretty black/brown in there and dohc by drilling I mean drilling the piston out with a drill bit lol and has that cider trick worked pretty well for you? Might be worth soaking then blasting with air
Mixing gas and haulin' ass
1984 ATC 70 x2
1985 ATC 250R-Ported/Polished, PWK 39mm, V-force 3's, Outerwears air box lid, FMF fatty with DG silencer, DWT wheels, LSR +4 axle, all black plastics
1985 ATC 250R-stock
I have heard of people having success removing a stuck piston by installing a grease fitting in the caliper, blocking off the other hole, and pumping grease into the caliper until it displaces the piston. Never tried it myself, but in theory it seems like it would work. But you would have a bit of mess to clean up. I have used the method yaegerb mentioned, and it worked quite well.
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haha no worries appreciate all the help!
Mixing gas and haulin' ass
1984 ATC 70 x2
1985 ATC 250R-Ported/Polished, PWK 39mm, V-force 3's, Outerwears air box lid, FMF fatty with DG silencer, DWT wheels, LSR +4 axle, all black plastics
1985 ATC 250R-stock