Bubbled Master Cylinder Paint
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Grand HDF Member
Joined: Jun 2008
Posts: 3,983
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From: Ohio
Bubbled Master Cylinder Paint
Leaking brake fluid from the master cylinder is a common HD problem. The paint on my Street Glide master cylinder / brake lever mount point is bubbled and ugly. I'm pretty **** about my bike, and that irritates me to no end. Any ideas on covers or repaint to fix the paint? What have you all done? Thanks!
Last edited by hd4evr2008; Feb 22, 2019 at 06:28 PM.
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Joined: Jan 2007
Posts: 15,788
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From: along the shore of Mishigami
Fortunately my two Dynas use a DOT 5 fluid, when they leaked I didn't experience the bubbling of paint. Wipe off the cylinder and cover with alcohol, cover the tank and fender, remove cover and gasket. Dry the gasket edge real good and the sealing surfaces. Put the gasket and cover back on, tighten the cover to 8 in.lbs., this just barely makes the gasket bulge out. For paint, I'd prep the surface clean, prime the bare metal and hit it with some flat black or semi-gloss paint after covering everything you don't want painted.
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
Thats what you get with DOT 3 or 4 brake fluid. Its the worlds best paint remover. DOT 5, being a silicone formulation wont do this. Harley used to use DOT 5, but its incompatible with ABS. Everybody decided theyd rather have ABS, so....
Road Warrior
Joined: Jul 2012
Posts: 1,996
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From: Cranbourne, VIC Australia
I have used satin black touch up paint from the auto parts store with good results. FYI it is typically from over tightening the cover.
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Road Warrior
Joined: Jul 2012
Posts: 1,996
Likes: 417
From: Cranbourne, VIC Australia
FYI I intentionally use a bit excess, and then use a thick piece of paper to drag across the edge to flatten and even it out with the existing paint. It matches up nicely, and appeases my OCD.
