mike0chek Posted August 14, 2012 Report Share Posted August 14, 2012 i just tried a 162 main and it still stumbles before the powerband (high rpm's of each gear) feals much better than the 165, looks like i got some work to do ha Quote Link to comment Share on other sites More sharing options...
vulvafan537240 Posted August 15, 2012 Report Share Posted August 15, 2012 im jetting my 421 cub now, 165 mains wont let the gears rev out so im droppin them now. set up: 421 drag ported, shearer inframes, 35mm carbs, +3 timing on pump gas, 4mil hot rods What size domes are you running for pump and what elevation? Quote Link to comment Share on other sites More sharing options...
Oregon dunner Posted August 15, 2012 Report Share Posted August 15, 2012 i just tried a 162 main and it still stumbles before the powerband (high rpm's of each gear) feals much better than the 165, looks like i got some work to do ha I would drop down your main and and bump up your timing. I am at a 152 main, 3rd clip and 50 pilot +7 timing on a ported cub by HJR. I beat the shit out of the motor last weekend and not a problem and my plugs look good. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted August 15, 2012 Report Share Posted August 15, 2012 What size domes are you running for pump and what elevation? 24cc not sure about elevation, 93 oct is best i can get Quote Link to comment Share on other sites More sharing options...
mike0chek Posted August 15, 2012 Report Share Posted August 15, 2012 I would drop down your main and and bump up your timing. I am at a 152 main, 3rd clip and 50 pilot +7 timing on a ported cub by HJR. I beat the shit out of the motor last weekend and not a problem and my plugs look good. ya it ran alot better from the 165 to 162 so ill drop it again, i gotta retorque the head tomorrow and check the plugs Quote Link to comment Share on other sites More sharing options...
hp2000 Posted November 8, 2012 Report Share Posted November 8, 2012 ? Quote Link to comment Share on other sites More sharing options...
vulvafan537240 Posted November 10, 2012 Report Share Posted November 10, 2012 ??? Quote Link to comment Share on other sites More sharing options...
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