Hey guys, I have an 02' CR80 Expert and I put a FMF-Q silencer on it. Should I drill some holes in the airbox, or adjust the jetting in anyway for better engine performance?
Always jet it after you change something that has an affect on the engine unless it runs the way you want already. Jetting just controls how the bike runs at idle, half, and full trottle. The CR shouldn't needed jetted after a new silencer. You could run the bike with out a silencer because all it does it trap carbon and silence the bike. Unles the bike runs rough, too slow, or too fast don't rejet. If you get a new pipe definetly rejet.
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