I need to jet my carb. I have a twin cam with a screaming eagle air cleaner with k&n and some s&s mufflers. On the recommendations in the diy column do you not change out the main jet? Thanks.

 

I would just bump up the low speed and adj the air screw for now.
Ride it and see what other changes are needed.

 

46 low speed jet, 190 high speed jet, raise needle 50 thousands( 2 small washers). Adjust mixture screw out 1 1/2 to 2 1/2 turns. Worked good for me.

 

I know I'm running lean. It likes to hickup through the carb quite a bit on the low end of the throttle.