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.
**Please note that this ECU does not support Diagnostic mode; it is designed to improve the UTV's engine performance only.
Yamaha
5B4-8591A-01-00
