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Old 08-31-2015, 09:44 AM
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Agreen Agreen is offline
Motorized Bicycle Elite Member
Join Date: Feb 2013
Location: Goose Creek, SC
Posts: 626
Default Re: Still getting really bad gas mileage.

So seafoam works well in an engine that's difficult to disassemble. The reason carbon builds up in the head is that it's usually just a rough cast surface. Take the head off and clean the carbon out, then mirror polish that badboy. Carbon won't come back then!

Here's some good spark plug info:
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