Yamaha GYTR Power Tuner

This easy plug-in fuel-injection and ignition tuning tool allows riders to quickly adjust the fuel and ignition maps to suit riding conditions and rider preference. Allows nine easy-to-program adjustment points for both the fuel and ignition maps. Monitor function allows user to monitor the data from various sensors on the bike as well as adjust idle timing, see engine running time, and self-diagnosis function.
Powered by two AA batteries, thus no laptop or time consuming downloads necessary. Unit does not have to be plugged into bike to create maps. Compact design can fit in the palm of your hand, pocket, etc. Memory function can save up to nine custom maps.
NOTE: Plugs right into the WR250F, WR450F,  YZ450F and YZ250F ECU... 
   (WR450F 12-14 requires GYTR Competition Kit/ECU, sold separately.)

WR250F 2015--2018..    WR450F 2016--2018
WR450F(2014, 2013, 2012)+GYTR BOX
YZ250F(2018,2017,2016,2015, 2014)
YZ450F(2017,2016, 2015, 2014, 2013, 2012, 2011, 2010)
(DO NOT USE ON 2018 YZ450F)