350banshee Posted January 1, 2010 Report Posted January 1, 2010 hey guys i just got a 421 big bore and put 34mm carbs and running 150 main but it has no bottom end??? runnig fmf fatty k&n strait off carbs. i have to keep clutching it to get it into band then it flys. any help would be great thanks Quote
locogato11283 Posted January 2, 2010 Report Posted January 2, 2010 we need more info about your setup. 421 stock cylinder or cub? 34mm pj's? im assuming this is a 4mm motor, regardless of whether its a stock cylinder or cub, but we need to know what kind of riding its been set up for. dune, drag, trail, mx etc? Quote
sleeper06 Posted January 2, 2010 Report Posted January 2, 2010 ported ,not ported what size pilot is in there now,what needle,timing,compression,reeds,more info and we will be able to help Quote
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