mods are green spring re jetted and a air box modification a great improvement over the stock

 

did you rejet because of the airbox mod?

 

How did you mod your airbox? Did you have to rejet? BK

 

I drilled two 1 1/2 " ( about ) holes at the rear corners and installed rubber breathers into them they stick out about a inch higher than the air box very easy also i think since your sucking more air you need more fuel so you rejet did not notice what size jet i installed so if anyone knows what size RCR sells for the TrailBoss i would like to know what size i have on . later folks