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Old June 29th, 2015   #1
tlfcwl
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Default Rear brake line explodes?

Was riding over Tioga Pass through Yosemite yesterday when hear a noise like a balloon exploding. At first I though it must be a blow out, but when I hit the brakes,met no resistance on rear brake pedal. Saw fluid dripping when I got it stopped and believe hydraulic line went. I must admit my ignorance of mechanical things is profound so I could be wrong as to what happened.
Ended up limping home at 35 mph,using engine breaking and front brake! Kind of scary ( and probably not too bright!)
Any one had similar occurrence?
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Old June 29th, 2015   #2
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Default Re: Rear brake line explodes?

Search here for Secondary master cylinder problems, It sounds more complicated than it is, there is a piston on the front left caliper that actuates the rear brake, this is prone to sticking, not returning after being pulled in, this in turn holds the rear brake on causing it to get hot and eventually boil up, hence the pop.
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Old June 29th, 2015   #3
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Default Re: Rear brake line explodes?

Thanks for the suggestion. Much appreciated!
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Old June 29th, 2015   #4
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Default Re: Rear brake line explodes?

Brakes - How it Works.
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Old June 29th, 2015   #5
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Default Re: Rear brake line explodes?

Was it the left rear brake hose that broke?
That happened to me, last year, at Oakhurst, while attempting to go through Yosemite, to Las Vegas.
Mine caught on fire and I had to have it taken back to Clovis on a flatbed.
Lots of money to fix.
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Old June 29th, 2015   #6
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Default Re: Rear brake line explodes?

My riding buddy just told me that it appeared as though I was riding my brakes, prior to that. He said the brake light was frequently on.
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Old June 29th, 2015   #7
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Default Re: Rear brake line explodes?

Did the brake line actually rupture? First I've heard of that happening! Seems more likely to have blown the top of the reservoir off. Which side of the bike did you see the fluid dripping from.
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Old June 29th, 2015   #8
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Default Re: Rear brake line explodes?

Quote:
Originally Posted by Wjbertrand View Post
Did the brake line actually rupture? First I've heard of that happening! Seems more likely to have blown the top of the reservoir off. Which side of the bike did you see the fluid dripping from.
At a guess I'd say If the secondary master is pushed/sticking on there is no way for the fluid to get back or expand to the reservoir. If the rear caliper is just binding , enough to get really hot that could cause the pressure to get back to the reservoir.
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Old June 29th, 2015   #9
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Default Re: Rear brake line explodes?

Quote:
Originally Posted by ligito View Post
My riding buddy just told me that it appeared as though I was riding my brakes, prior to that. He said the brake light was frequently on.
Mmmm, that doesn't sound like the SMC to me then, that sounds like a brake pedal or linkage issue.
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Old June 30th, 2015   #10
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Default Re: Rear brake line explodes?

The fluid was on the left side, dripping onto exhaust pipe and smoking. Going to take it into the local Honda shop and let them figure it out for me. Will let you all know what I find out.
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