fuel YAMAHA YZ85 2022 User Guide

Operation and important ri din g points
6-2
6
der. Remove any high spots on
the piston with #600-grit wet
sandpaper. Clean all components
and carefully reassemble the cyl-
inder head and cylinder.
7. Drain the break-in oil-fuel mixture from the fuel tank and refill with
the normal oil-fuel mixture. (See
page 4-3.)
8. Start the engine and check its power delivery and throttle re-
sponse throughout all gear rang-
es. Stop the engine and check the
spark plug condition. It should be-
gin to lighten in color.
9. Restart the motorcycle and ride it for about 10 to 15 more minutes.
Stop the engine and check the
spark plug condition. (See page
7-7.)
10. Lastly, thoroughly check the mo- torcycle for loose parts, oil leak-
age and any other problems.
Check all fittings and fasteners
and tighten as necessary.
TIPBe sure to inspect and make adjust-
ments thoroughly. In particular, check
control cable slack, drive chain slack
and for loose spokes.Notes on en gine overhauls
If the following parts have been re-
placed, they must be broken in as fol-
lows.  Piston, rings or transmission
gears: 30 minutes of break-in op-
eration at half-throttle or less.
 Cylinder or crankshaft: 60 minutes
of break-in operation is necessary.TIPObserve the condition of the engine
carefully during break-in operation.NOTICE
ECA10271
If any en gine trou ble shoul d occur
d urin g the en gine break-in perio d,
imme diately have a Yamaha dealer
check the vehicle.
EAU41308
Startin g an d warmin g up a
col d en gine1. Turn the fuel cock lever to “ON”.
2. Shift the transmission into the
neutral position.
3. Turn the starter (choke) on and completely close the throttle. (See
page 4-7.)
4. Start the engine by pushing the kickstarter lever down.
5. When the engine is warm, turn the starter (choke) off.TIPThe engine is warm when it responds
quickly to the throttle with the starter
(choke) turned off.NOTICE
ECA11043
For maximum en gine life, never ac-
celerate har d when the en gine is
col d!
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Operation and important ri din g points
6-4
6
3. Open the throttle gradually and si-
multaneously release the clutch
lever slowly.
4. Once the motorcycle has reached a speed high enough to change
gears, close the throttle, and at the
same time, quickly pull the clutch
lever in.
5. Shift the transmission into second gear. (Make sure not to shift the
transmission into the neutral posi-
tion.)
6. Open the throttle halfway and gradually release the clutch lever.
7. Follow the same procedure when shifting to the next gear.
EAU16711
To decelerate
1. Close the throttle and apply both the front and the rear brakes to
slow the motorcycle.
2. Downshift through the gears and shift the transmission into the neu-
tral position when the motorcycle
is almost completely stopped.
EAU17192
Parkin gWhen parking, stop the engine, and
then turn the fuel cock lever to “OFF”.
WARNING
EWA10312
Since the en gine an d exhaust
system can b ecome very hot,
park in a place where ped estri-
ans or chil dren are not likely to
touch them an d b e burne d.
 Do not park on a slope or on soft
groun d, otherwise the vehicle
may overturn, increasin g the
risk of a fuel leak an d fire.
 Do not park near grass or other
flamma ble materials which
mi ght catch fire.
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Periodic maintenance an d a djustment
7-4
7
15 Spark plu g• Check condition.
• Clean and regap.
√√
•Replace. √
16 *Drive chain • Check chain slack, alignment and condi-
tion.
• Adjust and thoroughly lubricate chain with Yamaha chain and cable lube or equiva-
lent. √√
•Replace. √
17 *Coolin g system • Check coolant level and for leakage.
√√
• Check hoses for cracks or damage. √
• Check radiator cap spring operation. √
• Change coolant. Every 2 years √
18 *Chassis fasteners • Check all chassis fitting and fasteners.
• Correct or tighten if necessary. √√
19 Air filter element • Clean.
√√
•Replace. √
20 *Frame • Clean and check for damage. √√
21 *Fuel line • Clean and check for leakage. √√
22 *Brakes • Adjust lever position and pedal height.
• Lubricate pivot points.
• Check brake disk surface.
• Check fluid level and for leakage.
• Tighten brake disk bolts, caliper bolts,
master cylinder bolts and union bolts. √√
• Replace brake pads. √
• Replace brake fluid. Every year √
NO. ITEM ROUTINE
After
break-
in Every race Every thir
d
race Every fifth
race As require
d
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Periodic maintenance an d a djustment
7-29
7 4. Install the washer and axle nut.
5. Adjust the drive chain slack. (See
page 7-20.)
EAU25872
Trou bleshootin gAlthough Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, do
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot lig hts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plod e, causin g severe injury or prop-
erty damag e.
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Periodic maintenance an d a djustment
7-30
7
EAU86370
Trou bleshootin g chart
Check the fuel level in
the fuel tank.1. Fuel
There is
enough fuel.
There is
no fuel.
Supply fuel.Check the ignition.
The engine does not start.
Check the ignition.
Try starting the engine.3. Compression
There is compression.There is
no compression. The engine does not start.
Have a Yamaha dealer check the vehicle.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.2. Ignition
Wet
Dry Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug
(s).
Have a Yamaha dealer check the vehicle. The engine does not start.
Check the compression.
Open the throttle halfway and
try
starting the engine.
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Motorcycle care and stora ge
8-3
8
will
become slippery, which
coul d cause loss of control.
Thorou ghly clean the surfaces
of these parts before operatin g
the vehicle.
[EWA20650]
5. Treat rubber, vinyl, and unpainted plastic parts with a suitable care
product.
6. Touch up minor paint damage caused by stones, etc.
7. Wax all painted surfaces using a non-abrasive wax or use a detail
spray for motorcycles.
8. When finished cleaning, start the engine and let it idle for several
minutes to help dry any remaining
moisture.
9. If the headlight lens has fogged up, start the engine and turn on
the headlight to help remove the
moisture.
10. Let the vehicle dry completely be- fore storing or covering it.NOTICE
ECA26320
Do not apply wax to ru bber or
unpainte d plastic parts. 
Do not use a brasive polishin g
compoun ds as they will wear
away the paint.
 Apply sprays an d wax sparin gly.
Wipe off excess afterwar ds.
WARNING
EWA20660
Contaminants left on the brakes or
tires can cause loss of control.  Make sure there is no lu bricant
or wax on the brakes or tires.
 If necessary, wash the tires with
warm water an d a mil d d eter-
g ent.
 If necessary, clean the b rake
d iscs an d pad s with b rake
cleaner or acetone.
 Before ri din g at hi gher spee ds,
test the vehicle’s brakin g per-
formance an d cornerin g b ehav-
ior.
EAU86460
Stora geAlways store the vehicle in a cool, dry
place. If necessary, protect it against
dust with a porous cover. Be sure the
engine and the exhaust system are
cool before covering the vehicle. If the
vehicle often sits for weeks at a time
between uses, the use of a quality fuel
stabilizer is recommended after each
fill-up.NOTICE
ECA21170
 Storin g the vehicle in a poorly
ventilate d room or coverin g it
with a tarp, while it is still wet,
will allow water an d humi dity to
seep in an d cause rust.
 To prevent corrosion, avoi d
d amp cellars, stab les (because
of the presence of ammonia)
an d areas where stron g chemi-
cals are stored .Long term stora ge
Before storing the vehicle long term (60
days or more):
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Motorcycle care and stora ge
8-4
8 1. Make all necessary repairs and
perform any outstanding mainte-
nance.
2. Follow all instructions in the Care Section of this chapter.
3. Fill up the fuel tank and add fuel stabilizer according to product in-
structions.
4. Run the engine for 5 minutes to distribute treated fuel through the
fuel system.
5. For vehicles with a fuel cock: Turn the fuel cock lever to the off posi-
tion.
6. For vehicles with a carburetor: To prevent fuel deposits from build-
ing up, drain the fuel in the carbu-
retor float chamber into a clean
container. Retighten the drain bolt
and pour the fuel back into the fuel
tank.
7. Use a quality engine fogging oil according to product instructions.
If engine fogging oil is not avail-
able, perform the following steps
for each cylinder:a. Remove the spark plug cap and spark plug. b. Pour a teaspoonful of engine
oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several times with the starter or kick-
starter. (This will coat the cylin-
der wall with oil.) WARNING!
To prevent d amage or injury
from sparkin g, make sure to
g roun d the spark plu g elec-
tro des while turning the en-
g ine over.
[EWA10952]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
8. Lubricate all control cables, piv- ots, levers and pedals, as well as
the sidestand and centerstand (if
equipped).
9. Check and correct the tire air pressure, and then lift the vehicle
so that all wheels are off the
ground. If maintenance stands are not available, turn the wheels a lit-
tle once a month in order to pre-
vent the tires from becoming
degraded in one spot.
10. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
11. For vehicles with a battery: Re- move and fully charge it, or attach
a maintenance charger. NOTICE:
Confirm that the battery an d its
char ger are compati ble. Do not
char ge a VRLA b attery with a
conventional char ger.
[ECA26330]
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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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