YAMAHA WR450F GYTR COMPETITION KIT 2GCE9500V000 The Competition Kit replaces the stock ECU and includes a new throttle stop to allow wide open throttle. *Kit includes YZ style throttle screw *Allows ECU adjustments via the GYTR Power Tuner sold separately *Specific maps for tuning capabilities available for free on the GYTR Power Tuner product page on the parts & accessories website This accessory affects emissions; installation on EPA-regulated 2006 or later WR models constitutes unlawful tampering except when used solely for closed-course competition. FIT WR450F(2018, 2017, 2016)