2019 YAMAHA KODIAK 450 cooling

8-36
8
WARNING
EWB02342Always let the exhaust system cool prior to
touching exhaust components.
Do not start the engine with the spark arrester
removed. Sparks or exhaust particulate can
cause eye injury, burns, or start a fire. 1. Remove the tailpipe bolts.
2. Remove the tailpipe by pulling it out of themuffler, and then remove the gasket. 3. Tap the tailpipe lightly, and then use a wire
brush to remove any carbon deposits from
the spark arrester portion of the tailpipe and
inside of the tailpipe housing.
4. Check the gasket for damage. Replace if nec- essary.
5. Install the gasket onto the tailpipe, then insert the tailpipe into the muffler and align the bolt
holes.
6. Install the bolts and tighten to the specified torque.
EBU23921V-belt cooling duct check hoseIf dust or water collects in the V-belt cooling duct
check hose, remove the hose and clean it.
1. Gasket
2. Spark arrester
3. Tailpipe
4. Tailpipe bolt
3
2
4
1
4
Tightening torque:
Tailpipe bolt:10 N·m (1.0 kgf·m, 7.4 lb·ft)
UBB561E0.book Page 36 Monday, March 26, 2018 11:15 AM

8-37
8
EBU23932V-belt case drain plugAfter riding in water deep enough to allow it to en-
ter the V-belt case, remove the V-belt case drain
plug to drain the water from the case.TIPIf water drains from the V-belt case after removing
the plug, have a Yamaha dealer check the ATV as
the water may affect other engine parts. 1. V-belt cooling duct check hose (left front side of ATV)
1
1. V-belt case drain plug
1
UBB561E0.book Page 37 Monday, March 26, 2018 11:15 AM

8-67
8Engine overheating
WARNING
EWB02291Wait for the engine and radiator to cool before removing the radiator cap. You could be burned by
hot fluid and steam blown out under pressure. Always put a thick rag over the cap when opening.
Allow any remaining pressure to escape before completely removing the cap. TIP
Tap water can be used in an emergency. Change to the recommended coolant as soon as possible.
 The engine will tend to overheat if the radiator is caked with mud, or if the ATV is overloaded. Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer check
and repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check and repair the cooling system.
There is
leakage.
There is
no leakage.
UBB561E0.book Page 67 Monday, March 26, 2018 11:15 AM

10-2
10
Cooling system:Liquid cooled
Valve train: SOHC
Number of cylinders:
Single cylinder
Displacement: 421 cm³
Bore × stroke:
84.5 × 75.0 mm (3.33 × 2.95 in)
Compression ratio:
10.0 : 1
Starting system: Electric starter
Lubrication system: Wet sumpEngine oil:Recommended brand:YAMALUBE
SAE viscosity grades: 5W-30, 10W-30, 10W-40, 15W-40, 20W-40, 20W-50 Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Quantity: Oil change:2.30 L (2.43 US qt, 2.02 Imp.qt)
With oil filter removal: 2.40 L (2.54 US qt, 2.11 Imp.qt)
Final gear oil:Type:Yamaha Friction Modified Shaft Drive Gear Oil
Quantity: 0.38 L (0.40 US qt, 0.33 Imp.qt)Differential gear oil:Type:Yamaha Friction Modified Shaft Drive Gear Oil or SAE 80
API GL-4 Hypoid gear oil
Quantity: 0.35 L (0.37 US qt, 0.31 Imp.qt)0 10 30 50 70 90 110 130 F
–20 –10 0 10 20 30 40 50 CSAE 5W-30
SAE 10W-30
SAE 10W-40
SAE 15W-40
SAE 20W-40SAE 20W-50
UBB561E0.book Page 2 Monday, March 26, 2018 11:15 AM

12-2
12
LLabel locations ............................................................... 1-1
Light switch .................................................................... 4-7MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................ 8-5
Maintenance chart, emission control system ................ 8-3
Model label .................................................................. 11-1NNeutral indicator light ..................................................... 4-2OOwner’s Manual and tool kit .......................................... 8-2PPanels, removing and installing ................................... 8-10
Park indicator light ......................................................... 4-2
Parking ........................................................................... 6-4
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1RRear brake, adjusting the lever and pedal ................... 8-41
Rear knuckle pivots, lubricating .................................. 8-51
Reverse indicator light ................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-13
Self-diagnosis device .................................................... 4-5
Shock absorber assemblies, adjusting the front and rear ............................................................................ 4-15
Spark arrester, cleaning ............................................... 8-35
Spark plug, checking ................................................... 8-17 Specifications .............................................................. 10-1
Speed limiter .................................................................. 4-8
Stabilizer bushes, checking ..........
............................... 8-50
Starting the engine ........................................................ 6-1
Start switch .................................................................... 4-6
Steering shaft, lubricating ............................................ 8-51
Storage .......................................................................... 9-2
Storage compartment .................................................. 4-14
TThrottle lever ........................................................... 4-8, 5-4
Throttle lever free play, adjusting ................................ 8-38
Tires ............................................................................... 5-4
Trailer hitch (for equipped models) .............................. 4-17
Troubleshooting ........................................................... 8-65
Troubleshooting charts ................................................ 8-66VValve clearance ............................................................ 8-38
V-belt case drain plug .................................................. 8-37
V-belt cooling duct check hose ................................... 8-36
Vehicle identification number ...................................... 11-1WWheel hub bearings, checking .................................... 8-49
Wheel, installing ........................................................... 8-63
Wheel, removing .......................................................... 8-63
Winch pre-wiring .......................................................... 4-18
UBB561E0.book Page 2 Monday, March 26, 2018 11:15 AM