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Old 06-29-2009, 01:21 PM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: Something Old Something New

In this case, fuel to air. Gray is lean, white really lean. Brown to black is good, black and oily is too rich.

In the case of gas to oil, a richer (in oil) mixture will cause the engine to run leaner (fuel to air).
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