Timing Retard Eliminator

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The TRE (Timing Retard Eliminator) is an electronic device that fools the ECU (engine control unit) of a motorcycle into thinking the gearbox is always in 4th gear and avoides the ECU retarding the ignition timing. This retardation reduces power and is done to limit partial throttle opening power in the lower gears (to prevent inexperienced riders from pulling wheelies) and acts as a speed limiter (300 km/h / 186 mph) of the motorcycle.

Kawasaki also have a similar system.

The modulation of the ignition curve varies from model to model as well as make. They do not provide any additional power overall but can increase top speed.