MY17-20 | ECU Tuning | Honda CRF 250 L and Rally

The 91 Octane Series of ECU reflashes change the spark timing to extract more power from 91 Octane (R+M)/2 fuel.  CORE ECU Option: Please send me a new ECU = You will receive a new ECU that is already tuned from us, no need to mail in your OE ECU.  I will send in my own ECU = You need to mail us your OE ECU so we can reflash it. If you purchased a new ECU from us, you can return your stock unit for a core deposit. The Core Deposit is $129.99 USD. To initiate a return, contact us at Email Support.   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 PAIR and EVAP check engine codes removed Required Modifications for STOCK IMPROVED: None - OE Bike Expected Required Modifications for STAGE 1: Free Flowing Muffler and Head Pipe (FMF, Yoshimura, or s