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Pro Mechanic
Ron Wade's Kawasaki KFX450R Tips & Tricks
::Continued::
Throttle Position Sensor Modification
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| The
arrow points to a paint line, which is used
to keep an eye of TPS movement since its
location is very critical |
“Changing the throttle position sensor was
one of the first things we did to the quad.”
Stated Wade. “Kawasaki told us about that.”
There is a slide on the side of the throttle position
sensor where you can change the voltage. “We
splice into the yellow wire on the ECU (electronic
control unit) and check it with a volt meter.”
Wade continued. “The stock voltage is .58
and we move it up to .64 volts. We move the slide
just a millimeter or two, it’s really sensitive
and moving it just a little bit really changes it.”
According to Ron, it’s a good idea to check
it regularly after doing the modification to make
sure it hasn’t moved out of position due to
vibration. In addition to the throttle position
sensor, Wade has also changed the idle control.
“I back it all the way down (counter clockwise)
and then move it back up 22 clicks clockwise which
raises the idle up and helps it to start better.”
These two modifications have helped Yokley get off
the line much faster.
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For safety reasons the KFX450R has roll-over
sensor to shut-off the vehicle incase the
ATV is flipped, and the key switch must
be reset in the event of a roll-over, but
in racing, this can cost valuable seconds,
so Ron disassembles the sensor and silicones
the floating part to circuit board, which
eliminates the issue. |
Air Box Modification
Getting more airflow to the engine is again a
simple (and free) modification. “One of
the first things we do is cut the screen out of
the stock air box.” Said Wade. “All
you need is a dremmel, a pair of wire cutters
and a pair of needle nose pliers.” The modification
takes approximately two hours to cut out the screen
and clean out any little bits and pieces that
may be left behind so none of it is sucked into
the motor.
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Stock Airbox(left) & Modified
Stock Airbox(right) with the screen removed,
which takes about an hour to completely
remove all the screen |
A
custom airbox lid was installed with outwear
fabric & aluminum housing for increased
flow yet protection from mud & water
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Dynojet Power Commander
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| DynoJet
Power Commanders are available at Sparks
Racing |
Once any intake modifications are made and there
is an increase in flow, the system needs to be remapped.
Wade uses The Dynojet Power Commander, which plugs
right into the CDI box. The Power Commander is a
fuel injection adjustment unit that plugs "inline"
with the bike’s stock ECU. The unit costs
around $340.00 and comes with software and a cable
link that allows you to change between different
maps or make adjustments to a map file. If the Power
Commander is removed, the bike goes back to its
stock factory settings.
Most of the modifications listed are fairly simple
and affordable, and a couple of them are even
freeAll it takes is a little time and effort,
and we thank William Yokley for allowing Ron Wade
to share some of his racing secrets with the world.
Also, ATVriders.com is currently building a project
KFX450R, so we will share more tips and available
add-on parts for the Kawasaki KFX450R in the very
near future.
www.YokleyRacing.com
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