Hot Shot Series Yamaha ECU Box 15_420

Hot Shot Yamaha ECU Box: This Rick's Hot Shot CDI Box allows the user to add & subtract fuel without the use of computer software. No rev limit in reverse; average increase of +5 Hp and +10 MPH. *The spark plug must be upgraded to a CR8E NKG plug when using this upgraded box. It is a replacement for OE# 5B4-8591A-01-00 & 5B4-8591A-00-00. ***Please note that this ECU does not support Diagnostic mode; it is designed to improve the UTV's engine performance only. *CDI Boxes are not covered under the One Year Warranty.