MY12-16 | ECU Tuning | Honda CRF 250 L

The 91 Octane Series of ECU reflashes change the spark timing to extract more power from 91 Octane (R+M)/2 fuel. Features of this reflash: More aggressive timing utilizing 91 octane fuel 11,000 RPM rev limiter Base fuel mapping enriched Closed loop fueling zones reduced which allows a better compromise between fuel economy and power Acceleration fuel maps enriched Warm idle raised up to 1500RPM Required Modifications for STOCK IMPROVED: None - OE Bike Expected, aftermarket air filter is acceptable Required Modifications for STAGE 1 with Stock Throttle Body: Free Flowing Muffler and Head Pipe (FMF, Yoshimura, or similar Required Modifications for STAGE 1 with 38mm Throttle Body: Free Flowing Muffler and Head Pipe (FMF, Yoshimura, or similar) 38mm Throttle Body Required Modifications for Big Bore Kit: Larger engine displacement > 249 CC [Please let us know the new displacement] Free Flowing Muffler and Head Pipe (FMF, Yoshimura, or similar) for best results Optional M