ok i got a yoshimura full exhaust, i rode it about 30 min today....it was running pretty bad....i put 150 in the left carb and 155 in the right....1 1/4 fuel/air screws out stock needle and stock pilots with some holes in the air box....when i only push in the gas a little bit and let go of the gas it pops....when im pushing in the gas more like half or 2/3 and fulll and let go it doesnt...when it was idiling once it died....and when i am going slow sometimes is like doesnt get any gas and just stops....only when im like going slow...when im going fast and just crusin it doesnt....help plz...i looked at the spark plug it was grey and looked like it was turning brown at the electrod (the very very tip)....




PLEASE HELP!!!


-SB

Lean baby lean. Sounds like both your pilot and main jet need to be changed out for some bigger ones. Maybe some of the raptor guys can give you an idea where you need to be. The popping is a classic sign of leaness.

it only pops and hesitates when im going slow.,,,mid thru top is great

Open up those fuel screws!!! I'm running a Big Gun with similiar jetting, and my screws are set at 3 turns out! If you need more advice on this, go to atvconnection.com Forums, Yamaha, and do a search on yoshi and jetting. Good luck...it's a pain adjusting the carbs on the reptile. Haz

Yes, 3 turns out on the screws. If you are running without the airbox lid you may need to increase the pilots to 27.5

ok, up and down the street ride report, i got to the carbs again...today was a pain in the ass since it was hot out side....i turned the air screws out 2 1/2 , put it all together...and rode it up and down the street....it didnt die or hesitate...it was running fine...i only rode it about 5 min....so when it cools off im gonna ride it about an hour and check the plug....there is a clear tube running a long the frame...where does it go on the carb...it looked like it didnt go anywhere so i just left it there.....


-SB