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Brake Pad Knock Back
I have been chasing some a pesky fork vibration for a few years now. I get it on heavy braking and at higher speeds. Now I notice I am getting some pad kick back, what I mean is I have good lever feel, then suddenly it will go soft but the next pump is firm. Bled the brakes, same deal. Took the master cylinder apart cleaned it up and put it back. Lever feels fine at a standstill. Just goes soft after rolling or riding, every once in awhile. I can only think that is some piston kick back. Are bad rotors the only thing that does that? I don't want to buy expensive new rotors if I should be looking at something else?
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Old rubber brake hoses can cause these symptoms. -
Do you live in the mountains? Could be they're getting hot from over use. Helped out someone from Alabama a couple of weeks ago, her SUV has an automatic transmission and she never drove in the mountains of Western NC before, I could see her discs glowing cherry red!1980 XS1100G
Intelligent people discuss ideas, average people discuss events, petty people discuss other people.Comment
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second on Deebs,,,replace hoses if old,,,ebay has good, cheap braided stainless brake lines, various lengths if needed,,,also check axle bolt, caliper bolts and front fork brace bolts for tightness,,,maybe give the brakes another bleed, keep us informed, Mike in S.Diego and Pa.
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Moisture in the caliper can cause that. It vaporizes when the brakes get hot.
More of a problem with DOT5 than DOT 3/4.-Mike
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'79 XS1100SF 20k miles
'80 XS1100SG 44k miles
'81 XS1100H Venturer 35k miles
'79 XS750SF 17k miles
'85 Honda V65 Magna ~7k miles
'84 Honda V65 Magna 48k miles (parts bike)
'86 Yamaha VMAX 9k miles
Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65Comment
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Brakes lines were new in 2018, as per the date on them. I don't use Dot 5... Dot 3 usually, sometimes 4. Sea level. Has not been hot. Have been through the front end many times making sure torques are correct. Its a bit of a mystery to me. Brake rotors warped?Comment
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You should be able to determine if the rotors are warped when coming to a slow stop, 5 MPH down to zero you should be able to feel it using the front brake only.2H7 (79) owned since '89
3H3 owned since '06
07 Triumph Tiger 1050 (night rider)
"If it ain't broke, modify it"
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