DICK’S RACING INTELAJET CARB MOD
MXA TEAM TESTED
WHAT IS IT? Dick’s Racing progressively bores out the
stock KTM 250SX two-stroke carb from 36mm to 39mm
and installs the creative Intelajet system. It fits on all
KTM two-stroke carbs from 2004 to 2012.
WHAT’S IT COST? $425.00 (carb bored progressively
from 36mm to 39mm with Intelajet installed); $30.00
(Intelajet mounting kit); $40.00 (taper-bore carb ends).
CONTACT? www.dicksracing.com or (916) 722-2373.
WHAT STANDS OUT? Here’s a list of things that
stand out with Dick’s Racing 36mm to 39mm carb mod.
(1) Stock KTM carb. Believe it or not, KTM mounts
small 36mm Keihin PWK carbs on their 250cc and 300cc
two-strokes. Most two-strokes come with 38mm or larger
( 2) Dick’s Racing carb. Dick Wilk taper-bores the
stock KTM carb so that it flows from 36mm to 39mm; he
can also taper-bore the ends for even more power.
Tapering the carb’s bore makes the Keihin PWK work
like a 36mm carb below one-third throttle but a big carb
( 3) Intelajet. What is Intelajet? It is the two-stroke
equivalent of the dual fuel-injection nozzles on the 2012
Kawasaki KX250F. The Keihin carb functions normally
below two-thirds throttle, but as air velocity increases,
excess fuel is sprayed out of the Intelajet’s emulsion tube
upstream from the main jet. It has the feel of a
supercharger. The Intelajet doesn’t dump raw fuel into
the carb as much as it sprays a fine mist into the air
stream to enhance fuel burn at high rpm. The amount of
fuel coming through the emulsion tube is controlled by
an air-bleed dial, which is accessible to the rider.
( 4) Jetting. The only jetting change that we made to
our preferred 2012 KTM 250SX brass was to replace our
160 mainjet with a smaller 152, because the Intelajet
emulsion tube spray makes up for any loss in high-rpm
( 5) Performance. Awesome! Incredible! Worth the
money! Amazing! Fantastic! Unbelievable! Pick the
adjective that you like best. The gain in top-end power
and overrev was immediately noticeable to every MXA
test rider. It has no effect on power below two-thirds
throttle, but once the mist kicks in, the KTM 250SX feels
like it has a jet pack attached to it.
WHAT’S THE SQUAWK? We had to fiddle with the
needle clip and air screw to keep the midrange tuned to
the high-rpm overdrive, but it was not a big deal.
In three words: we love it.
INTELAJET kits are available for all makes and models ATV’s, Motorcycles & Snowmobiles.
Thunder Products, Inc. - Manufacturer of INTELAJET & Dial-A-Jet www.thunderproducts.com 320-597-2700