I recently installed a Procircuit pipe and Silencer in my Blaster and was running a #250 Main jet with the air box lid removed. I have since installed a K&N air filer any suggestions on what jet # I should start at?

 

I have also move the jet needle to the fourth clip position. Somebody please help!!!!!

 

I'm not 100% positive but I think you need to go with a 240 main jet and the jet needle clip in the third position. Try that.