8-1
ENGINE
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ENGINE
OVERVIEW
Engine overview .....................................................................page 8-1
Grabber plate .........................................................................page 8-3
Engine assembly removal ....................................................page 8-4
Engine-mounted items ..........................................................page 8-6
Schematic - GX-160, GX-200 with hour meter ....................page 8-7
Schematic - Kartrol GX-160, GX-200 with hour meter .......page 8-8
Schematic - LED lighting & hour meter..................................................
page 8-9
Schematic - Kartrol GX-270 (CDI coil) engine ....................................
. page 8-10
ENGINE FAQS
Q: WHERE DO I FIND MORE INFORMATION ON THE HONDA ENGINE?
A: With each new
fl
eet, the owner’s portfolio provided contains a Honda service manual for the appropriate sized
engine(s) installed on your karts. Replacement Honda service manuals can be purchased separately; contact the parts
department for pricing. The following pages include information on the Honda engines that can be unique to a go-
kart application, and may not be fully explained in the Honda manual. Please refer the Honda service manual for exact
speci
fi
cations and torque values for any repairs.
Q: HONDA SAYS TO DECARBONIZE THE COMBUSTION CHAMBER: WHY?
A: Small engines are very sensitive to carbon buildup. Excess carbon will cause seemingly unrelated starting and running
problems.
The Honda GX motors come equipped with a spring-loaded
trigger on the cam gear designed to crack the exhaust valve and
release the built-up compression during starting. When excessive
carbon builds up or the valves are way out of adjustment, the
small amount of lift from the trigger may not allow enough
compressed air to escape. The most common result of this
problem is poor starting on cold start, and/or the motor kicks
back and rips the starter handle out of your hand.
CLEANING COMBUSTION CHAMBER AND
VALVES/VALVE SEATS:
A simple wire wheel on a drill motor and a proper scraper will do
the job, but be careful! Do not damage the aluminum cylinder
head. Be sure to clean and inspect the valve stem and all other
components, i.e. rocker arms, valve spring, push rods, valve
tappets and all gaskets. Use a simple valve-lapping compound
and hand-lapping tool to polish the valve face and seat. (Follow
the instructions included with the valve grinding kit).