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ENGINE
4-48
COOLIING SYSTEM FAILURE ELIMINATION CHART
Temperature indicator too high
Y
Stop engine and wait completely
cooled down. Remove pressure cap
to check coolant lever in radiator.
N
Refill coolant into radiator and check
any leakage?
Y
Coolant leakage problem
Y
Turn on main switch and check
coolant temperature indicator back to
zero?
N
Measure thermostat and confirm
voltage 6 V above.
N
Replace thermostat unit.
Y
Y
Inspect the circuits of coolant
temperature short cut or ground.
Y
Short cut and ground handle
test.
N
Meter problem
Remove radiator pressure cap and
lightly throttle, verify coolant has
circulated?
N
Stop engine and remove water pump
cover. Start engine to inspect pump
rotation?
N
Y
Water pump repair.
Water hose clogged
Y
Install radiator and measure thermo
unit to confirm voltage reduced
comply with temperature ride?
N
Replace thermo unit
Y
Keep engine 3000~4000 rpm and
inspect cooling fan was turn on after
temperature gauge over 3
rd
scale.
N
Measure fan thermo switch terminal
to verify opening circuit or ground?
Y
Y
Connect with multi-meter and verify
cooling fan turns on?
Connect cooling fan terminal with
battery directly to check fictional?
Y
Y
If circuit connects reverse, cooling
fan will forward, correct wires and
confirm again.
Keep engine 3000~4000 rpm and
inspect coolant flow into reserve
tank after temperature gauge over 3
rd
scales.
Replace thermostat
Y
Remove thermostat and heat it by hot
water to check functional?
Y
Refill coolant and check
again.
For bleed air bubble completely. Remove radiator cap and start engine while engine
is cold then press water hose softly by hand to bleeding. Turn the throttle repeatedly
until the coolant surface becomes stable.
Ensure the coolant hose not
twist and kink while air
bubble bleeding.
Summary of Contents for 350cc
Page 11: ...GENERAL INFORMATION 1 11...
Page 32: ...CVT SYSTEM 3 32...
Page 43: ...ENGINE 4 43 ENGINE SERVICE ENGINE EXPLODED VIEW 1...
Page 44: ...ENGINE 4 44 ENGINE EXPLODED VIEW 2...
Page 45: ...ENGINE 4 45...
Page 46: ...ENGINE 4 46 ENGINE COOLING SYSTEM COOLING SYSTEM EXPLODED VIEW...
Page 53: ...ENGINE 4 53 TOP END DISASSEMBLY...
Page 60: ...ENGINE 4 60...
Page 74: ...ENGINE 4 74...
Page 103: ...ELECTRONIC FUEL INJECTION 5 103 FUELTANK...
Page 168: ...ELECTRICAL 7 168...
Page 171: ...ELECTRICAL 7 171...
Page 191: ...ELECTRICAL 7 191...
Page 192: ...ELECTRICAL 7 192...