Do you have to re-jet? I removed the airbox lid, and put on a K&N Filter with outerwears.

 

yes you must rejet. Get genuine mikuni jets at www.jetsrus.com. they have stainless allen float bowl screws which are priceless. JMO

 

Okay thanks. I am at sea level, what size main do you think i am going to need?

 

As the temperature fluctuates you will have to rejet to compensate for the change in the air to fuel ratio (temperature change alters the density of the air). When it is cold you will have to jet richer. Because of this I would suggest buying a kit or several sizes...it will save on shipping later. you will obviously have to go bigger than what you have now, try 4 or 5 jets of the next bigger size.

 

I am going to buy jetsrus jet kit for my blaster.