Seller notes

Blackbox CDI Rev Box Honda XR400 (1999-2004) MC-H400 Blackbox CDI boxes have more aggressive/advanced timing curves and raise your RPM limit to enhance performance all through your RPM range.  Up To A 4 Horsepower Gain! Increases Rev Limit From 9,300 to 10,300 RPM Authorized dealer About Us:ATV Galaxy is an authorized dealer located in Irvine California. Please feel free to contact us anytime with questions or tech help. We are open Monday-Thursday 8-5 PM, Fridays 8-3:30 PM. Listing and templat...

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