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Old 07-27-2009, 10:57 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

Check your plug and see if it is running too rich or too lean, either can be causing it to not run right at higher rpm's. I had to lean mine out a lot when I put my expansion chamber on.
Design is easy, execution the hard part.
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