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High Performance Bicycle Engine Tips We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us.

head gasket upgrade


Discussion at Motorized Bicycle Engine Kit Forum in the High Performance Bicycle Engine Tips forum. I took my head to a machine shop and had about 10 thousandths taken off (cost about 30 bucks), then ...
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Old 10-01-2008, 08:58 PM
Home-made J's Avatar
Motorized Bicycle Apprentice
 
Join Date: Sep 2008
Location: Santa Cruz, CA
Posts: 18
Default head gasket upgrade

I took my head to a machine shop and had about 10 thousandths taken off (cost about 30 bucks), then got some copper sheet, had my buddy at a metal fab shop punch 1 7/8" holes in it. I cut out the outline and punched the 4 stud holes. Then I annealed the new gasket to cherry red and then into water. This takes out the tooling and makes it very plyable. I seated it down snug then took her for a short ride to heat it all up, then (slightly) retorqued it tighter. The greater surface area from the lapping combined with the copper make this a nice, no leak, higher compression upgrade.
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