- 2003 Grizzly Diff-Lock Override
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modification to your ATV, should be performed ONLY at your own risk.
Purpose of this modification:
To override the 22MPH wheel-speed limiter when operating in "4WD
Results to expect after successful
competion of this modification:
Much less limited wheel-speed when in Diff-Lock. The CDI still has a
limit on your MAX RPM at about 8500RPM's. If you choose to hardwire the
mod, you won't need to use your thumb for the override.
Negative side effects of this modification:
Increased stress will be exerted on all components, like Axles, CV
Joints and other drivetrain components. The early 03 model year Grizzly
was an especially bad year for axles.
Standard hand tools
Parts or materials required:
None for basic hardwired override. Optionaly a switch or pushbutton can
be used to control when the override condition is enabled and disabled.
Approximate or estimated cost of mod:
To override the Diff-Lock speed limiter on the 02 and 03 Grizzly, the
speed sensor input to the CDI will be removed. Thus the CDI never knows
you are even moving.
Remove the seat and the screw that secures the CDI in the electronics
cavity. (left side near the frame rail)
With the CDI lifted away from its normal seated position, locate the
white wire. It is on the third connector (down) on the CDI unit if held
in it's original orientation.
To perform the mod with no switch, just cut the white wire and insulate
the ends and your done.
If you intend to use a switch to control (enable and disable) the
override, you will need to use solderless (butt-splice) connectors to
extend both wire ends to the location where the switch or pushbutton is
to be mounted. Each wire end must be routed the contact terminals of a
SPST switch or momentary pushbutton. Some owners locate a toggle switch
under the seat area, just in case a less experienced rider may drive
their Grizz someday. It can quickly be temporarily reconnected for
Be sure to test the function of your override and know the new
capabilities before getting into a situation where it is needed. Your
Grizz should no
longer be limited to 22 MPH when in Diff-0Lock mode.