Oil gas mix/ jetting

[Brent Johnvin]

hey guys am a little confused? am running a keith 34mm Pj carb with no air box K&N, .60 Borded, and i have a 160 for main jet and what i have herd you should be running 280 290 around there for a main jet right? the confused part is that i was running 52:1 which was WAY TO RICH for mixture then i used 32:1 witch is right mixture. if i have a bigger jet for main that means just more gas comming thought the carb, my blaster is a little boggy and i also have a procircit pipe on there what main jet should i be running? THANKS I:I

 

[4cfed]

hey guys am a little confused? am running a keith 34mm Pj carb with no air box K&N, .60 Borded, and i have a 160 for main jet and what i have herd you should be running 280 290 around there for a main jet right? the confused part is that i was running 52:1 which was WAY TO RICH for mixture then i used 32:1 witch is right mixture. if i have a bigger jet for main that means just more gas comming thought the carb, my blaster is a little boggy and i also have a procircit pipe on there what main jet should i be running? THANKS I:I

as for the jetting numbers.. diff carbs use diff numbers jets, like a stock blaster carb will use a 270 for pipe/no lid, and a lt250r will use a 220 for pipe and no lid, and some use 160-180s depends on the carb and how the jets are numberd,

52:1?? thats wayy to lean of fuel mixture... the lower the first number the more oil mixed, 32:1 is 4 oz oil per 1 gallon of gas, which is the way to go!!

and if its a little boggy your prob pretty close on jetting, you can look on keihins sit and it should tell you where abouts to have the screw set at, i know on the stock carb its like 1.5 turns out for the a/f screw, and that seems to be just right... i had mine at 1 3/4 turns with a 270 main for fmf pipe and no lid

 

[Brent Johnvin]

okay, thanks. but what should i be running for a main jet with all my mods?