Hey I got a 01 blaster its my kids bike i have put a vforce 3 reedcage, full fmf fatty pipe and silencer, it's bored .40 over and has a miled port and polish job. im running the stock carb. I will be running at the dunes in oregon which is at sealevel i just want to get it right so i don't break the motor if you guys can help please do thanks

 

Airbox?
Lid?
pods?
K&N?

If you run open airbox with a K&N I would say either a 300 or 310. With pods you will need to go a bit bigger.