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Old 07-26-2008, 11:17 AM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: Bicycle motor coloring?

It only affects the aluminum, and the longer you leave it on, the darker it gets up to a point. It doesn't hurt the aluiminum or eat it away at all, just darkens it. It does take a bit to get all the residue off, but nothing out of hand.

There is still some residue on the engine in the picture, but I didn't scrub it completely, just rinsed it so it would stop darkening.

It goes without saying- don't get any inside the ports.

Last edited by Bikeguy Joe; 07-26-2008 at 11:21 AM.
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