2008 Yamaha WR250 X/R

Installation Instructions
Button Adjustment Display
Parts List Power Commander USB Cable CD-ROM Installation Guide Power Adapter Power Commander Decals Dynojet Decals Zip ties The ignition MUST be turned OFF before installation!
Faceplate Buttons USB Port

Expansion Port

You can also download the Power Commander software and latest maps from our web site at: www.powercommander.com
PLEASE READ ALL DIRECTIONS BEFORE STARTING INSTALLATION
Dynojet Research 2191 Mendenhall Drive North Las Vegas, NV 89081 (800) 992-4993 www.powercommander.com
i432-411 www.powercommander.com 2008 Yamaha WR250 X/R - PCIII USB - 1

Remove covers

Fig. A
Remove the seat and fuel tank. Remove both side covers (Fig. A).

Fig. B

Remove bolt
Remove the headlight by removing the bolt shown in Figure B on both sides.

Zip ties

Fig. C
Attach the PCIII to the bottom of the headlight using the supplies zip ties (Fig. C).
Also see Figure L for reference.

i432-411

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2008 Yamaha WR250 X/R - PCIII USB - 2

Fig. D

Route the PCIII harness thru the cable guide on the left hand side of the frame (Fig. D)

PCIII harness

Fig. E
Route the PCIII harness between the frame and coolant reserve bottle (Fig. E). Continue to route above the engine and go towards the throttle body.

Fig. F

Unplug the stock wiring harness from the injector (Fig. F).

Unplug harness

2008 Yamaha WR250 X/R - PCIII USB - 3

Stock connector

Fig. G

PCIII connectors

Plug the PCIII connectors in-line of the stock wiring harness and injector (Fig. G).

Fig. H

Locate the Throttle Position Sensor connector on the right hand side of the throttle body.
This connector is covered with a BLACK rubber boot. Unplug the TPS connector from the throttle body (Fig. H).

Fig. J

Plug the PCIII connectors in-line of the stock TPS and wiring harness (Fig. J).
Stock connector i432-411 www.powercommander.com 2008 Yamaha WR250 X/R - PCIII USB - 4

Fig. K

Attach the ground wire of the PCIII to the negative side of the battery (Fig. K). Reinstall side covers and fuel tank.
Figure L is another angle of the PCIII install.

Fig. L

2008 Yamaha WR250 X/R - PCIII USB - 5

2008 Yamaha WR250 X/R

Installation Instructions Parts List
Ignition module Installation Guide Zip ties
You can also download the Power Commander software and latest maps from our web site at: www.powercommander.com
The ignition MUST be turned OFF before installation! This module is intended to be used in conjunction with Power Commander #432-411
Before this module can be used the Power Commander may need to be updated.
(see included instructions)
PLEASE READ ALL DIRECTIONS BEFORE STARTING INSTALLATION
Dynojet Research 2191 Mendenhall Drive North Las Vegas, NV 89081 (800) 992-4993 www.powercommander.com
6-65 www.powercommander.com 2008 Yamaha WR250 X/R - PCIII USB - 1

Remove covers

Fig. A
Remove the seat and fuel tank. Remove both side covers (Fig. A).

Fig. B

Remove bolt
Remove the headlight by removing the bolt shown in Figure B on both sides.

Fig. C

Secure the Ignition Module to the PCIII unit by using the supplied zip ties (Fig. C).

Zip ties

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2008 Yamaha WR250 X/R - PCIII USB - 2

Fig. D

Route the Ignition Module harness thru the cable guide on the left hand side of the frame (Fig. D)

IM harness

6 Fig. E
Route the Ignition Module harness between the frame and coolant reserve bottle (Fig. E). Continue to route to the top of the engine.

7 Fig. F

Locate the 2 pin GREY connector under the left hand radiator cover. This connector is inside the BLACK rubber boot. Unplug the crank pickup coil connector (Fig. F)
Unpug GREY connector 6-65 www.powercommander.com 2008 Yamaha WR250 X/R - PCIII USB - 3

Fig. G

Plug the white connectors from the Ignition Module in-line of the stock wiring harness and crank pickup coil sensor (Fig. G).

Fig. H

Unplug the stock wiring harness from the coil stick (Fig. H).

Fig. J

Plug the Ignition Module in-line of the stock wiring harness and coil stick (Fig. J).
2008 Yamaha WR250 X/R - PCIII USB - 4

IM ground wire

Route the ground wire from the Ignition Module under the frame crossover. Attach the ground wire from the Ignition Module to the negative side of the battery (Fig. K). Plug the WHITE 10 pin connector from the Ignition Module into the expansion port of the PCIII. Reinstall the fuel tank and bodywork.
2008 Yamaha WR250 X/R - PCIII USB - 5