yea i got my 230 main in and i bought it that way i guess the guy didnt know he had to rejet. so thats y my quads been parked for like awhile now til the jets come in. dont wanna fry my motor! eg, OEM jets are equivilant to higher jetting than stated, almost to a dyno jet. for an example dynos 300 main and mikuni 280 might be real close or sumthing like that..
quote from AWK08: heres a lil sumthin i found, it was a way bigger list, but i cut out the closest jet sizes to what were talkin here.......
Carb Jet Cross Reference, Keihin, Dynojet, Mikuni Friday, March 14, 2008 9:03 PM (permalink)
Width------Keihin # -- DynoJets # -- Mikuni #
0.0890---- 227.5------- 200--------- 187.5
looks like a mikuni 187 jet is equivalant to a 200 dyno jet < thats about 2 sizes bigger number than the mikuni
that being said, you should be running around a 270/280 main mikuni jet with your mods so a dyno jet equivalant should be in the low 300's, 310 possibly
if ya have one near that size throw it in there, with the stock needle on the middle clip position, and stock pilot jet, airscrew at 1 1/2 turns out
should be close
very rarely does the stock pilot or needle need changed in a stock mikuni carb, anyone who has had to do those changes either have huge mods or is compensating for an airleak or sumthin else
that needle and clip setting suggested provided by dyno is prolly your bogging troubles, try just to get the main right first, one thing at a time not a bunch of changes all at once, then chase your tail tryin to figure out which one is wrong
bottom line...........stock pilot jet, airscrew 1 1/2 turns, stock needle -middle clip,
low 300's dyno main jet
WOT plug chop and no airleaks !!!!!!
quote from AWK08: heres a lil sumthin i found, it was a way bigger list, but i cut out the closest jet sizes to what were talkin here.......
Carb Jet Cross Reference, Keihin, Dynojet, Mikuni Friday, March 14, 2008 9:03 PM (permalink)
Width------Keihin # -- DynoJets # -- Mikuni #
0.0890---- 227.5------- 200--------- 187.5
looks like a mikuni 187 jet is equivalant to a 200 dyno jet < thats about 2 sizes bigger number than the mikuni
that being said, you should be running around a 270/280 main mikuni jet with your mods so a dyno jet equivalant should be in the low 300's, 310 possibly
if ya have one near that size throw it in there, with the stock needle on the middle clip position, and stock pilot jet, airscrew at 1 1/2 turns out
should be close
very rarely does the stock pilot or needle need changed in a stock mikuni carb, anyone who has had to do those changes either have huge mods or is compensating for an airleak or sumthin else
that needle and clip setting suggested provided by dyno is prolly your bogging troubles, try just to get the main right first, one thing at a time not a bunch of changes all at once, then chase your tail tryin to figure out which one is wrong
bottom line...........stock pilot jet, airscrew 1 1/2 turns, stock needle -middle clip,
low 300's dyno main jet
WOT plug chop and no airleaks !!!!!!
