thomas h. Posted April 17, 2013 Report Share Posted April 17, 2013 Do builders cut 2 mm out of a stock head to clear the 4mm crank? I picked up a shee last week and it was advertised a 400cc by alba but it didn't have the plate. It had no port and 310 jets and the pistons are coated in carbon because the jetting was rich. I can't read the top of pistons with video scope. Any other way to check besides tearing it down? I put 290 mains and its good now Quote Link to comment Share on other sites More sharing options...
Coupelx Posted April 17, 2013 Report Share Posted April 17, 2013 Yes it can be done. you can measure the stroke using something like a pencil doen the spark plug hole. make a mark at top dead center and bottom dead center. stock is 54mm so 58 is a 4mil crank. Quote Link to comment Share on other sites More sharing options...
thomas h. Posted April 17, 2013 Author Report Share Posted April 17, 2013 Also measured with a pencil. Not a 4mill Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted April 17, 2013 Report Share Posted April 17, 2013 To answer an earlier question, yes a stock head can be set up to accept stroke. Quote Link to comment Share on other sites More sharing options...
thomas h. Posted April 18, 2013 Author Report Share Posted April 18, 2013 I like the sleeper 4 mill idea. Also less leaks and better than spacer Quote Link to comment Share on other sites More sharing options...
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