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hot brake line

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Old Jun 26, 2011 | 11:48 AM
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cormech
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Default hot brake line

Hi,
I just changed my front brake line to a steel braided line. After about 5 min of riding it is melting the clear protective sheath off of it. the brake line will be to hot to touch but my caliper is nice and cool. How can just changing the brake line do this? I used DOT 5 fluid like the manual said to use. The only thing that I can think of is that the line is not as wide as the old stock line. Could that be it? Thanks for the help.
 
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Old Jun 27, 2011 | 05:59 PM
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Just in-case someone else has this problem. I had a pinched wire in the switch housing. That caused the brake line to become a ground and the steel brade would heat up like a heating element.
 
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Old Aug 25, 2011 | 08:31 PM
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There is an unassociated ground strap that runs from your top tree to the riser bolt. This strap grounds the handlebars to the tree (and ultimately the rest of the bike). It is needed because the poly or rubber riser bushings break the connection otherwise. Without this strap, the ground will find another path, sometimes using the wiring or more likely the clutch, throttle, or brake cable/line. A nice stainless brake line would make a great grounding strap, but probably give enough resistance to get pretty hot. Once it grounds out to a good contact point (caliper) it no longer produces heat at that point, only where there is resistance (brake line). Check that strap. On mine, it was on the brake lever side riser bolt.
 
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