jiffy Posted August 12, 2004 Report Share Posted August 12, 2004 (edited) I have jetted mikuni carbs but not keihins. Would anyone have a close guess on what I would need for a main jet? ( Each main jet around 5 bucks) I know with mikuni 34mm carbs I would need around a 310 main What would that be for Keihins?I Have a 421cc Cheetah kit with Paul Turner mid range pipes, and clamp on air filters. Anyhelp would be Nice Jeff Edited August 13, 2004 by jiffy Quote Link to comment Share on other sites More sharing options...
jiffy Posted August 13, 2004 Author Report Share Posted August 13, 2004 no one ?? Quote Link to comment Share on other sites More sharing options...
United Pot Smoker Posted August 13, 2004 Report Share Posted August 13, 2004 hello, me and you both. i just got a keihin PJ 34mm carb with a trinity intake and adapter for the stock air box and im clueless. all i know is there is a 190 main jet in there and a 78 pilot. i think the guy i bought it from just had fmf fattys and a shaved head. i hope someone else might reply. i have a dyno port exhaust and stock air intake box with just a new foam air filter. anyone know what jets i should start with? the ones in there are on the rich side of things so i might just go from there. Quote Link to comment Share on other sites More sharing options...
Banchetta Posted August 20, 2004 Report Share Posted August 20, 2004 I"m runnin a 4mm stroker w/ PTR mids and low end porting. I'm running 185-190 mains, 58 pilots....cgk needles 5th clip from the blunt end. Quote Link to comment Share on other sites More sharing options...
bigwill Posted August 20, 2004 Report Share Posted August 20, 2004 Hey UPS-you might want to lose that pipe with those carbs-That dynoport is nice on stock motors-with those carbs you would need more exhaust flow I would think-Hey Toomey Blaster-I smoked my first YFZ450 last weekend at asarco-he came to ME wanting to race-He must have thought my bigass was a sitting DUCK-We raced 4 times---He was PISSED -never under estimate the FATMAN Quote Link to comment Share on other sites More sharing options...
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