[AngrySlinky]

I have an 2006 CRF 450 with a full bills exhaust and a twin air filter with the air box mod and the AP mod. I can't seem to find what jets I should be running with this current setup. What should my main/slow/needle clip position be with the current modifications I have on the bike. Please and thank you

[staffy24]

hi i run 170 with clip 4th pos from the top but it depends on your altitude and air temp fuel screw about 2 turns out standard leak but am thinking of trying a 50

[AngrySlinky]

I just pulled my carb off I have all the stock jets at the moment and my elevation is 942 ft my air temp since we are going into fall is going to be around 60-70

[AngrySlinky]

Update post. I installed a 180 main jet. I still get a puff of black smoke when I wack the throttle. Is that something I should look into jetting ect ? Other then the little test down the ally it seemed to really crack when I twisted the throttle.