GYTR® Power Tuner
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Description

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 YZ®450F, YZ®450FX, YZ®250FX, and YZ®250F ECU. WR®450F and WR®250F requires GYTR® Competition Kit/ECU, sold separately.

Check the Specifications tab for baseline settings.

Download the GYTR Power Tuner Race Setup Log

GYTR Power Tuner Suggested Baseline Settings

These settings are a general starting point; many factors will affect settings, including rider preference, accessory modification, track and atmospheric conditions.

2016-2017 YZ450F

Printable PDF
Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +1 +1 +1
3/8 0 0 0
1/8 0 0 0
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +2 +3 +3
3/8 +2 +3 +2
1/8 +2 +2 +2
 

Strong pulling, mid/top. Premium Pump Gas.

Linear Torque/ Hard-Pack Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +2 +2 +2
3/8 +2 +1 +1
1/8 +2 +1 +1
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -3 -3 -3
3/8 -2 -2 -2
1/8 -3 -2 -2
 

Controllable low-end power. Slower revving and longer pulling. Premium Pump Gas.

Smooth Linear/ Slippery Conditions
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -1 -1 -1
3/8 -1 -1 -1
1/8 -2 -1 -1
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -4 -5 -3
3/8 -4 -4 -3
1/8 -4 -4 -3
 

Smooth power delivery. Increased control in muddy conditions. Premium Pump Gas.

Aftermarket Exhaust
Developed by Motocross Action Magazine
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 0 -1 -1
3/8 0 0 0
1/8 -2 0 -2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 0 0 0
3/8 0 +1 +1
1/8 +1 +1 +1
 

Strong pulling, mid/top.

 

2016-2017 YZ450FX

Printable PDF
Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -1 -1 -1
3/8 0 0 0
1/8 0 0 0
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +2 +3 +2
3/8 +2 +3 +2
1/8 +2 +2 +2
 

Long pulling, high revving. Premium Pump Gas.

Linear Torque/ Hard-Pack Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +2 +2 +2
3/8 +2 +2 +3
1/8 +2 +2 +2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -5 -5 -6
3/8 -5 -6 -6
1/8 -5 -5 -5
 

Controllable low-end power. Slower revving and longer pulling. Premium Pump Gas.

Smooth Linear/ Slippery Conditions
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -2 -1 -1
3/8 -2 -2 -1
1/8 -2 -2 -2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -6 -6 -5
3/8 -6 -5 -5
1/8 -6 -6 -6
 

Smooth power delivery. Increased control in muddy conditions. Premium Pump Gas.

2017 YZ250F

Printable PDF
Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -2 -1 0
3/8 -1 -2 -2
1/8 -1 -1 -1
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +1 -1 -2
3/8 +2 +2 +2
1/8 +2 +2 +2
 

Quick revving. Stronger pulling, mid/ top RPM.

Smooth Linear/ Slippery Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +1 +2 0
3/8 +2 +3 +1
1/8 +1 +3 +2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +2 +1 -1
3/8 +2 +2 -1
1/8 +1 +2 0
 

Smooth power delivery. Controllable low RPM power with strong pulling feel/

2015-2016 YZ250FX

Printable PDF
GYTR or Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
4000700010000
Throttle 3/4 -2 -1 0
3/8 -2 -2 0
1/8 -1 -2 -2
IgnitionRPM
4000700010000
Throttle 3/4 +2 +2 +2
3/8 +2 +3 +2
1/8 +1 +3 +2
 

Premium Pump Gas.

Smooth Linear/ Slippery Condition
 
FuelRPM
4000700010000
Throttle 3/4 +1 +2 0
3/8 +2 +3 +1
1/8 +1 +3 +2
IgnitionRPM
4000700010000
Throttle 3/4 -2 -1 -1
3/8 -2 -2 -1
1/8 -1 -2 -1
 

Premium Pump Gas.

2016-2017 WR450F

For use with GYTR Competition Kit/ECU

Printable PDF
GYTR or Aftermarket Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
4000700010000
Throttle 3/4 -1 -1 -1
3/8 0 0 0
1/8 0 0 0
IgnitionRPM
4000700010000
Throttle 3/4 +2 +3 +2
3/8 +2 +3 +2
1/8 +2 +2 +2
 

Premium Pump Gas.

Smooth Linear/ Slippery Condition
 
FuelRPM
4000700010000
Throttle 3/4 +2 +2 +2
3/8 +2 +2 +2
1/8 +2 +2 +2
IgnitionRPM
4000700010000
Throttle 3/4 -5 -5 -6
3/8 -5 -6 -6
1/8 -5 -5 -5
 

Premium Pump Gas.

Stock Exhaust
Consistent Power Delivery at All RPM
 
FuelRPM
4000700010000
Throttle 3/4 -2 -2 -2
3/8 -3 -3 -3
1/8 -4 -4 -4
IgnitionRPM
4000700010000
Throttle 3/4 -2 -2 -2
3/8 -2 -2 -2
1/8 -2 -2 -2
 

Premium Pump Gas.

2015-2017 WR250F

For use with GYTR Competition Kit/ECU

Printable PDF
GYTR or Aftermarket Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
4000700010000
Throttle 3/4 -2 -1 0
3/8 -2 -2 0
1/8 -1 -2 -2
IgnitionRPM
4000700010000
Throttle 3/4 +2 +2 +2
3/8 +2 +3 +2
1/8 +1 +3 +2
 

Premium Pump Gas.

Smooth Linear/ Slippery condition
 
FuelRPM
4000700010000
Throttle 3/4 +1 +2 0
3/8 +2 +3 +1
1/8 -+1 +3 +2
IgnitionRPM
4000700010000
Throttle 3/4 -2 -1 -1
3/8 -2 -2 -1
1/8 -1 -2 -1
 

Premium Pump Gas.

Stock Exhaust
Consistent power delivery at all RPM
 
FuelRPM
4000700010000
Throttle 3/4 -2 -2 -3
3/8 +1 -1 -3
1/8 +1 0 0
IgnitionRPM
4000700010000
Throttle 3/4 0 0 0
3/8 0 0 0
1/8 0 0 0
 

Premium Pump Gas.

33D-H59C0-V1-00
WR250F(2017, 2016, 2015)
WR450F(2017, 2016, 2015, 2014, 2013, 2012)
YZ250F(2017, 2016, 2015, 2014)
YZ250FX(2016, 2015)
YZ450F(2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010)
YZ450FX(2017, 2016)

GYTR Power Tuner Suggested Baseline Settings

These settings are a general starting point; many factors will affect settings, including rider preference, accessory modification, track and atmospheric conditions.

2016-2017 YZ450F

Printable PDF
Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +1 +1 +1
3/8 0 0 0
1/8 0 0 0
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +2 +3 +3
3/8 +2 +3 +2
1/8 +2 +2 +2
 

Strong pulling, mid/top. Premium Pump Gas.

Linear Torque/ Hard-Pack Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +2 +2 +2
3/8 +2 +1 +1
1/8 +2 +1 +1
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -3 -3 -3
3/8 -2 -2 -2
1/8 -3 -2 -2
 

Controllable low-end power. Slower revving and longer pulling. Premium Pump Gas.

Smooth Linear/ Slippery Conditions
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -1 -1 -1
3/8 -1 -1 -1
1/8 -2 -1 -1
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -4 -5 -3
3/8 -4 -4 -3
1/8 -4 -4 -3
 

Smooth power delivery. Increased control in muddy conditions. Premium Pump Gas.

Aftermarket Exhaust
Developed by Motocross Action Magazine
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 0 -1 -1
3/8 0 0 0
1/8 -2 0 -2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 0 0 0
3/8 0 +1 +1
1/8 +1 +1 +1
 

Strong pulling, mid/top.

 

2016-2017 YZ450FX

Printable PDF
Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -1 -1 -1
3/8 0 0 0
1/8 0 0 0
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +2 +3 +2
3/8 +2 +3 +2
1/8 +2 +2 +2
 

Long pulling, high revving. Premium Pump Gas.

Linear Torque/ Hard-Pack Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +2 +2 +2
3/8 +2 +2 +3
1/8 +2 +2 +2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -5 -5 -6
3/8 -5 -6 -6
1/8 -5 -5 -5
 

Controllable low-end power. Slower revving and longer pulling. Premium Pump Gas.

Smooth Linear/ Slippery Conditions
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -2 -1 -1
3/8 -2 -2 -1
1/8 -2 -2 -2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 -6 -6 -5
3/8 -6 -5 -5
1/8 -6 -6 -6
 

Smooth power delivery. Increased control in muddy conditions. Premium Pump Gas.

2017 YZ250F

Printable PDF
Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 -2 -1 0
3/8 -1 -2 -2
1/8 -1 -1 -1
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +1 -1 -2
3/8 +2 +2 +2
1/8 +2 +2 +2
 

Quick revving. Stronger pulling, mid/ top RPM.

Smooth Linear/ Slippery Condition
 
FuelRPM
LOWMIDHIGH
Throttle 3/4 +1 +2 0
3/8 +2 +3 +1
1/8 +1 +3 +2
IgnitionRPM
LOWMIDHIGH
Throttle 3/4 +2 +1 -1
3/8 +2 +2 -1
1/8 +1 +2 0
 

Smooth power delivery. Controllable low RPM power with strong pulling feel/

2015-2016 YZ250FX

Printable PDF
GYTR or Stock Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
4000700010000
Throttle 3/4 -2 -1 0
3/8 -2 -2 0
1/8 -1 -2 -2
IgnitionRPM
4000700010000
Throttle 3/4 +2 +2 +2
3/8 +2 +3 +2
1/8 +1 +3 +2
 

Premium Pump Gas.

Smooth Linear/ Slippery Condition
 
FuelRPM
4000700010000
Throttle 3/4 +1 +2 0
3/8 +2 +3 +1
1/8 +1 +3 +2
IgnitionRPM
4000700010000
Throttle 3/4 -2 -1 -1
3/8 -2 -2 -1
1/8 -1 -2 -1
 

Premium Pump Gas.

2016-2017 WR450F

For use with GYTR Competition Kit/ECU

Printable PDF
GYTR or Aftermarket Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
4000700010000
Throttle 3/4 -1 -1 -1
3/8 0 0 0
1/8 0 0 0
IgnitionRPM
4000700010000
Throttle 3/4 +2 +3 +2
3/8 +2 +3 +2
1/8 +2 +2 +2
 

Premium Pump Gas.

Smooth Linear/ Slippery Condition
 
FuelRPM
4000700010000
Throttle 3/4 +2 +2 +2
3/8 +2 +2 +2
1/8 +2 +2 +2
IgnitionRPM
4000700010000
Throttle 3/4 -5 -5 -6
3/8 -5 -6 -6
1/8 -5 -5 -5
 

Premium Pump Gas.

Stock Exhaust
Consistent Power Delivery at All RPM
 
FuelRPM
4000700010000
Throttle 3/4 -2 -2 -2
3/8 -3 -3 -3
1/8 -4 -4 -4
IgnitionRPM
4000700010000
Throttle 3/4 -2 -2 -2
3/8 -2 -2 -2
1/8 -2 -2 -2
 

Premium Pump Gas.

2015-2017 WR250F

For use with GYTR Competition Kit/ECU

Printable PDF
GYTR or Aftermarket Exhaust
Hard Hitting/ Loamy Condition
 
FuelRPM
4000700010000
Throttle 3/4 -2 -1 0
3/8 -2 -2 0
1/8 -1 -2 -2
IgnitionRPM
4000700010000
Throttle 3/4 +2 +2 +2
3/8 +2 +3 +2
1/8 +1 +3 +2
 

Premium Pump Gas.

Smooth Linear/ Slippery condition
 
FuelRPM
4000700010000
Throttle 3/4 +1 +2 0
3/8 +2 +3 +1
1/8 -+1 +3 +2
IgnitionRPM
4000700010000
Throttle 3/4 -2 -1 -1
3/8 -2 -2 -1
1/8 -1 -2 -1
 

Premium Pump Gas.

Stock Exhaust
Consistent power delivery at all RPM
 
FuelRPM
4000700010000
Throttle 3/4 -2 -2 -3
3/8 +1 -1 -3
1/8 +1 0 0
IgnitionRPM
4000700010000
Throttle 3/4 0 0 0
3/8 0 0 0
1/8 0 0 0
 

Premium Pump Gas.

33D-H59C0-V1-00
WR250F(2017, 2016, 2015)
WR450F(2017, 2016, 2015, 2014, 2013, 2012)
YZ250F(2017, 2016, 2015, 2014)
YZ250FX(2016, 2015)
YZ450F(2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010)
YZ450FX(2017, 2016)

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