2022 YAMAHA YZ85 engine coolant

Table of contents
Location of important la bels ............1-1
Safety information ............................2-1
Description ........................................3-1
Left view ..........................................3-1
Right view ........................................3-2
Controls and instruments ................3-3
Instrument an d control functions ....4-1
Handlebar switch ............................4-1
Clutch lever .....................................4-1
Shift pedal .......................................4-2
Brake lever ......................................4-2
Brake pedal .....................................4-3
Fuel tank cap ...................................4-3
Fuel ..................................................4-3
Fuel tank breather hose...................4-6
Fuel cock .........................................4-6
Starter (choke) knob ........................4-7
Kickstarter .......................................4-7
Seat .................................................4-7
Adjusting the front fork ....................4-8
Front fork bleeding ........................4-10
Adjusting the shock absorber assembly ....................................4-11
Removable sidestand ....................4-14
YPVS system .................................4-14 For your safety – pre-operation
checks
............................................... 5-1
Operation an d important ri din g
points ................................................. 6-1
Engine break-in............................... 6-1
Starting and warming up a cold engine .......................................... 6-2
Starting a warm engine................... 6-3
Shifting............................................ 6-3
Parking ............................................ 6-4
Perio dic maintenance an d
a d justment ........................................ 7-1
Periodic maintenance and lubrication chart .......................... 7-2
Checking the spark plug................. 7-7
Transmission oil .............................. 7-8
Coolant ........................................... 7-9
Cleaning the air filter element ....... 7-11
Adjusting the carburetor ............... 7-13
Adjusting the engine idling speed......................................... 7-13
Adjusting the throttle grip free play ............................................ 7-13
Tires .............................................. 7-14
Spoke wheels ............................... 7-16
Adjusting the clutch lever free play ............................................ 7-16
Checking the brake lever free play ............................................ 7-17 Checking the shift pedal ............... 7-18
Checking the front and rear brake
pads ........................................... 7-18
Checking the brake fluid level ....... 7-19
Changing the brake fluid ............... 7-20
Drive chain slack ........................... 7-20
Cleaning and lubricating the drive chain .......................................... 7-22
Checking and lubricating the cables ........................................ 7-22
Checking and lubricating the
throttle grip and cable ............... 7-23
Checking and lubricating the brake and clutch levers ............. 7-23
Checking and lubricating the brake pedal ................................ 7-24
Lubricating the rear suspension.... 7-24
Lubricating the swingarm pivots ... 7-24
Checking the front fork ................. 7-25
Checking the steering ................... 7-25
Checking the wheel bearings ........ 7-26
Supporting the motorcycle ........... 7-26
Front wheel ................................... 7-26
Rear wheel .................................... 7-27
Troubleshooting ............................ 7-29
Troubleshooting chart ................... 7-30
Motorcycle care an d stora ge .......... 8-1
Matte color caution ......................... 8-1
Care................................................. 8-1
Storage............................................ 8-3
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Periodic maintenance an d a djustment
7-9
7
5. Install the drain bolt and its new
gasket, and then tighten the bolt
to the specified torque.
6. Refill with the specified amount of the recommended transmission
oil.
NOTICE
ECA10453
In or der to prevent clutch slip-
pa ge (since the transmission oil
also lu bricates the clutch), d o
not mix any chemical additives.
Do not use oils with a d iesel
specification of “CD” or oils of a
hi gher quality than specifie d. In
a ddition, do not use oils la beled
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the transmission.7. Check the O-ring for damage, and replace it if necessary.
8. Install and tighten the transmis- sion oil filler cap and its O-ring.
9. Start the engine, and then let it idle for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off
and check for the cause.
EAU20071
CoolantThe coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM1296
To check the coolant level1. Place the vehicle on a level sur- face and hold it in an upright posi-
tion.TIPThe coolant level must be
checked on a cold engine since
the level varies with engine tem-
perature.
 Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.2. Remove the radiator cap and
check the coolant level in the radi-
ator. WARNING! Never attempt
to remove the ra diator cap
when the en gine is hot.
[EWA10382]
1. Transmission oil filler cap
2. O-ring
3. Transmission oil drain bolt
4. GasketTi ghtenin g torque:
Transmission oil drain bolt: 10 N·m (1.0 kgf·m, 7.4 lb·ft)
12
4
3
Recommen ded transmission oil:
Motor oil SAE 10W-40 type SG or
higher
Oil chan ge quantity:
0.50 L (0.53 US qt, 0.44 Imp.qt)
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Periodic maintenance an d a djustment
7-10
7
TIPThe coolant should be at the bottom of
the radiator filler neck. The level will
change with variation of engine tem-
perature.
3. If the coolant is below the correct
coolant level, add coolant, and
then install the radiator cap.
NOTICE: If coolant is not avail-
a b le, use d istilled water or soft
tap water instea d. Do not use
har d water or salt water since it
is harmful to the en gine. If water
has been used instead of cool-
ant, replace it with coolant as
soon as possi ble, otherwise the
coolin g system will not b e pro-
tected against frost an d corro-
sion. If water has b een added to
the coolant, have a Yamaha
d ealer check the antifreeze con-
tent of the coolant as soon as
possi ble, otherwise the effec-
tiveness of the coolant will be
re duce d.
[ECA10473]
EAUM1318
To change the coolant
1. Place the vehicle on a level sur- face and let the engine cool if nec-
essary.
2. Place a container under the en- gine to collect the used coolant. 3. Remove the radiator cap, and
then the coolant drain bolt and its
gasket to drain the cooling sys-
tem. WARNING! Never attempt
to remove the ra diator cap
when the en gine is hot.
[EWA10382]
1. Radiator cap
1. Correct coolant level
11
1
1. Radiator cap
1. Coolant drain bolt
2. Gasket
11
2
1
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Periodic maintenance an d a djustment
7-11
7 4. After the coolant is completely
drained, thoroughly flush the cool-
ing system with clean tap water.
5. Install the coolant drain bolt and its new gasket, and then tighten
the bolt to the specified torque.
6. Pour the recommended coolant into the radiator until it is full.
7. Install the radiator cap, start the engine, let it idle for several min-
utes, and then turn it off.
8. Remove the radiator cap to check the coolant level in the radiator. If
necessary, add sufficient coolant until it reaches the bottom of the
radiator filler neck, and then install
the radiator cap.
9. Start the engine, and then check the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
EAU48394
Cleanin g the air filter elementThe air filter element should be cleaned
or replaced at the intervals specified in
the periodic maintenance and lubrica-
tion chart. Clean or, if necessary, re-
place the air filter element more
frequently if you are riding in unusually
wet or dusty areas.
1. Remove the seat. (See page 4-7.)
2. Remove the air filter element by removing the wing bolt and its
washer.
3. Remove the sponge material from the air filter element frame.
Tightenin g torque:
Coolant drain bolt: 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Antifreeze/water mixture ratio: 1:1
Recommen ded antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibi-
tors for aluminum engines
Coolant quantity: Radiator (including all routes):0.50 L (0.53 US qt, 0.44 Imp.qt)
1. Wing bolt
2. Washer
3. Air filter element
1 1
3 32
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Periodic maintenance an d a djustment
7-31
7
EAU86420
En gine overheatin g
WARNING
EWAT1041
Do not remove the ra diator cap when the en gine an d ra diator are hot. Scal din g hot flui d an d steam may be
b lown out un der pressure, which coul d cause serious injury. Be sure to wait until the en gine has coole d.
 Place a thick ra g, like a towel, over the ra diator cap, an d then slowly rotate the cap counterclockwise to the
d etent to allow any resi dual pressure to escape. When the hissin g soun d has stoppe d, press d own on the cap
while turnin g it counterclockwise, an d then remove the cap.TIPIf coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended cool-
ant as soon as possible.
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 checkand 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.
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Specifications
9-1
9
Dimensions:Overall length:1820 mm (71.7 in) (YZ85, YZ85N)
1895 mm (74.6 in) (YZ85LW, YZ85LWN)
Overall width: 760 mm (29.9 in)
Overall height:
1135 mm (44.7 in) (YZ85, YZ85N)
1175 mm (46.3 in) (YZ85LW, YZ85LWN)
Seat height:
840 mm (33.1 in) (YZ85, YZ85N)
885 mm (34.8 in) (YZ85LW, YZ85LWN)
Wheelbase:
1255 mm (49.4 in) (YZ85, YZ85N)
1285 mm (50.6 in) (YZ85LW, YZ85LWN)
Ground clearance:
320 mm (12.60 in) (YZ85, YZ85N)
360 mm (14.17 in) (YZ85LW, YZ85LWN)Wei ght:Curb weight:
73 kg (161 lb) (YZ85, YZ85N)
75 kg (165 lb) (YZ85LW, YZ85LWN)
Maximum rider weight: 62.0 kg (137 lb)Engine:Combustion cycle:
2-stroke
Cooling system: Liquid cooled
Number of cylinders: Single cylinder
Displacement:
85 cm³ Bore
× stroke:
47.5 × 47.8 mm (1.87 × 1.88 in)
Starting system: Kickstarter
Engine oil:Engine oil:
YAMALUBE 2R
Recommended brand:Transmission oil:Type: Motor oil SAE 10W-40 type SG or higher
Quantity:
0.50 L (0.53 US qt, 0.44 Imp.qt)Coolant quantity:Radiator (including all routes):0.50 L (0.53 US qt, 0.44 Imp.qt)Fuel:Recommended fuel:Unleaded gasoline (E10 acceptable)
Octane number (RON): 98
Fuel tank capacity:
5.0 L (1.3 US gal, 1.1 Imp.gal)Car buretor:Type × quantity:
PWK28 × 1
Drivetrain:Gear ratio:
1st:
2.455 (27/11)
2nd: 1.882 (32/17)
3rd:
1.529 (26/17)
4th: 1.294 (22/17)
5th: 1.130 (26/23)
6th:
1.000 (25/25)Front tire:Type:With tube
Size:
70/100-17 40M (YZ85, YZ85N)
70/100-19 42M (YZ85LW, YZ85LWN)
Manufacturer/model:
DUNLOP/MX3SFRear tire:Type: With tube
Size:
90/100-14 49M (YZ85, YZ85N)
90/100-16 52M (YZ85LW, YZ85LWN)
Manufacturer/model:
DUNLOP/MX3SFront brake:Type:
Hydraulic single disc brake
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11-1
11
Index
AAir filter element, cleaning .................... 7-11BBrake and clutch levers, checking
and lubricating ................................... 7-23
Brake fluid, changing............................ 7-20
Brake fluid level, checking.................... 7-19
Brake lever.............................................. 4-2
Brake lever free play, checking ............ 7-17
Brake pedal ............................................ 4-3
Brake pedal, checking and lubricating........................................... 7-24CCables, checking and lubricating ......... 7-22
Carburetor, adjusting............................ 7-13
Care ........................................................ 8-1
Clutch lever............................................. 4-1
Clutch lever free play, adjusting ........... 7-16
Coolant ................................................... 7-9DDrive chain, cleaning and lubricating ... 7-22
Drive chain slack .................................. 7-20EEngine break-in ...................................... 6-1
Engine idling speed .............................. 7-13
Engine overheating ............................... 7-31
Engine serial number ............................ 10-1
Engine, starting a warm.......................... 6-3
Engine stop switch ................................. 4-1FFront and rear brake pads, checking ... 7-18
Front fork, adjusting ............................... 4-8
Front fork, bleeding .............................. 4-10
Front fork, checking ............................. 7-25 Fuel ........................................................ 4-3
Fuel cock................................................ 4-6
Fuel tank breather hose ......................... 4-6
Fuel tank cap.......................................... 4-3
HHandlebar switch ................................... 4-1IIdentification numbers ......................... 10-1KKickstarter .............................................. 4-7LLabels, location ...................................... 1-1MMatte color, caution ............................... 8-1PParking ................................................... 6-4
Part locations ......................................... 3-1
Periodic maintenance and lubrication
chart ..................................................... 7-2RRear suspension, lubricating................ 7-24SSafety defects, reporting (For CANADA customers) ......................... 10-2
Safety information .................................. 2-1
Seat ........................................................ 4-7
Shifting ................................................... 6-3
Shift pedal .............................................. 4-2
Shift pedal, checking ........................... 7-18
Shock absorber assembly, adjusting ... 4-11
Sidestand ............................................. 4-14
Spark plug, checking ............................. 7-7
Specifications......................................... 9-1
Starter (choke) knob............................... 4-7 Starting and warming up a cold
engine ................................................... 6-2
Steering, checking ................................ 7-25
Storage ................................................... 8-3
Supporting the motorcycle ................... 7-26
Swingarm pivots, lubricating ................ 7-24
TThrottle grip and cable, checking and lubricating ........................................... 7-23
Throttle grip free play, adjusting ........... 7-13
Tires ...................................................... 7-14
Transmission oil ...................................... 7-8
Troubleshooting .................................... 7-29
Troubleshooting chart........................... 7-30VVehicle identification number ............... 10-1WWheel bearings, checking .................... 7-26
Wheel (front).......................................... 7-26
Wheel (rear)........................................... 7-27
Wheels .................................................. 7-16YYPVS system ........................................ 4-14
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