(300Busa @ Nov. 29 2006,23:34) so what is a TRE?...you never explained...
It makes the engine "think" that it is in 5th gear all the time. This provides better throttle response and drive ability at 4500 rpm and under, and reduces the stumbling associated with the stock timing from the factory in the lower gears.
It also shuts off the high speed limiter, and lets the bike run as fast as it can.
