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Old 07-29-2009, 12:10 AM
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Ghost0 Ghost0 is offline
Motorized Bicycle Elite Member
Join Date: Mar 2008
Location: Bellingham, WA
Posts: 764
Default Re: problem with expansion chamber

The color of you plug will tell you if you are running too rich or too lean, white is too lean and black is too rich. You can adjust this a little by adjusting the needle in the carb my moving the clip up or down. If that is not enough you will need to get a different jet.
Design is easy, execution the hard part.
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