Hopefully this is a fairly simple question and I've just over looked the obvious. What is a TRE mod? Thanx,
Tre mod is very cheap like 20 bucks. Your bike has the timing retard in the first 3 gears ....the TRE mod you just by pass the wire and splice it with the higher gear wire...I have heard some people do it with a toggle switch so you can switch back and forth !!! People who have it done say they will never put it back the way it was stock !!! What kinda bike ya have??