OCTOBER 2013 / DIRT BIKE 53
A JD Jetting Power Surge allows for more less fuel plus
corrections in humidity, temperature and air pressure.
Dicks fits a Rekluse Core EXP clutch (full auto with clutch lever
feel) and an FMF Power Bomb header (targeting both sound and
bottom power). A TM Design Works skidplate is light and tough.
FIRST OFF, THE MOTOR
Since working with the original KTM 350SXF in 2011, Dick
was armed with new technology in the form of throttle-body
mods and tuning aimed at coaxing more low-end power out of
the engine while keeping the higher-rpm output. For Dick, adding bottom power was the key to success with the mid-to-top
appeal of the 350 powerband. His first ride on the stocker left
him wanting; it was still soft off the bottom, and the WP suspension was miserably soft for any cowboy over 190 pounds.
Dick felt that he could find low-end power without getting
too ballistic. In testing, he discovered that the Quad Flow
torque wing eliminated turbulence in the intake tract and
immediately improved response. Next, Dick bolted on an FMF
PowerBomb/Q exhaust that utilized a longer and reduced
diameter initial head pipe that improves torque and retains the
high-rpm boost. This helped bring to light the fact that with the
mods, the stock fuel mapping was way too lean. When whacking the throttle open too quickly, the engine would just bog,
then die at the worst possible moment.
The solution involved installing a JD mapping device that
allowed for a richer fuel setting that could be tuned for any
application. After some serious fiddling, Dick found a strong
blend that richened the flow in the right regions and made
instant power off idle that continued a more serious whack