By Winston “Boss” McKannick
GETTING BEAT BY 50s
I bought my son a 2014 Can-Am
DS90X, and he fell in love with it right
away. He was eager to race it, so
we went to our local track. However,
when the gate dropped, 50cc quads
pulled him down the straightaway.
Even though he had the throttle
pinned on his 90, the 50s kept pulling him lap after lap. After the race
he complained that the motor was
too slow and asked me to adjust the
throttle to go wide open. I didn’t have
the heart to tell him it already was.
What can I do to wake up his quad?
The only aftermarket performance
parts for it that I can find is a kit from
Hetrick Racing. Any advice you can
offer would be greatly appreciated.
I hate to tell you, John, but a good
two-stroke 50 is faster than any four-stroke 90. You can sink a lot of money
into the 90 to get it to perform well.
Before you start opening your wallet,
I suggest you read this forum first, all
nine pages of it:
if you are still wanting to go with
race hop-ups, talk to the folks at
ScooterDomain.com ( 881-3435 or
email them at sales@scooter
domain.com). Let me know how you
are making out.
BURNING MY BUTT!
Our family has a 2012 Polaris 800
Crew. We take if for family outings,
but lately it overheats and shuts off.
The seat is so hot you can hardly sit
on it. I have replaced the ECT sensor,
ECU, wiring harness, thermostat, and
even run it without the thermostat,
and there is no change in the overheating of the Crew. Boss, have you
heard of anything like this?
Actually, I have! And, while not
wide spread, there are certainly a
number of Crew owners experiencing the same thing. Polaris will deny
there is a problem, but the fix is
spelled out in their service manual.
There is a sensor on the parking
brake that when the brake is out of
DIALING IN A KFX700
I have a 2004 Kawasaki KFX700
that is stock, except for a slip-on HMF
exhaust and a K&N air filter. I re-
jetted the carbs following the HMF
instructions, but then noticed that
the tip of the muffler was always
covered in black soot. So, I went back
to the stock jetting and the engine
runs great. There is no missing, pop-
ping or nothing. Should I worry, or
just keep running the stock jetting?
Thanks for your advice.
Scott, what you just learned is,
quads don’t read jetting recommendation charts. Read your spark plug
and listen to your motor. It will tell
you what it likes and doesn’t like!
You should be fine.
I have a problem carrying my
Yamaha Grizzly in my Toyota
Tundra. I have a full-width toolbox
that takes up a good portion of the
rear box. Then, when I load my
Grizzly in the bed, the rear wheels
are resting on the tailgate. I have
already broken one tailgate cable,
and to make matters worse, the gate
is bending from the weight. Do you
have a solution that doesn’t involve
removing the heavy toolbox each
time I want to transport my Grizzly?
Or, purchasing a tow-behind trailer
because my Tundra can’t carry anything?!
Dalton Spring, NV
I am not sure if you are aware of
this, Chris, but the Toyota Tundra is
power. Adjustment for the parking
brake is this: three clicks, the brake
light comes on; nine clicks, some
pressure on the brake; 13–15 clicks
will hold the Crew from rolling. This
should fix your overheating problem
by allowing full power from your
IS MY VAPOR LOCKED OR
I have a strange problem with
my 2010 Outlander Max 800R. Last
week we were on week-long riding
and camping trip. Every day in the
afternoon, about four to five hours
into the ride, my machine would
start stumbling, missing and dying,
the symptoms of vapor lock. I could
usually restart, but would die within
a few seconds. Letting it sit for 30
minutes or so would usually solve the
problem. The other solution was to
add gas. It would then immediately
start and run—sometimes for an
hour, sometimes for more. We were
at high-altitude, warm temperatures.
My thought vapor lock, but it is very
difficult to vapor lock high-pressure
fuel injection. Plus, if there was air
in lines, I am not sure it would start
immediately. My other thought was
that the fuel pump was quitting when
it got hot and the cool gas was cooling the pump enough to get it going
I tend to agree with you, son, I
don’t think you have a vapor-lock
problem, either. If I were a bettin’
man, I would bet your fuel pump is
overheating. When hot, if your fuel
pressure drops below 51 psi, then
you could see performance problems
like you are experiencing. I have
heard good reports on the installation of an Airtex E8335 electric fuel
pump. Although it draws a bit more
power than an OEM unit, at 6. 5 amp,
it is U.S.-made, and there many good
reviews on Amazon from UTV owners here: www.amazon.com/Airtex-