Ratio YAMAHA YZ85 2012 User Guide

FOR YOUR SAFETY – PRE-OPERATION CHECKS
5-2
5
Rear brake 
Check operation.
 If soft or spongy, have Yamaha dealer bleed hydraulic system.
 Check brake pads for wear.
 Replace if necessary.
 Check fluid level in reservoir.
 If necessary, add specified brake fluid to specified level.
 Check hydraulic system for leakage. 7-19, 7-20
Clutch 
Check operation.
 Lubricate cable if necessary.
 Check lever free play.
 Adjust if necessary. 7-17
Throttle grip 
Make sure that operation is smooth.
 Check throttle grip free play.
 If necessary, have Yamaha dealer adjust throttle grip free play and lubricate cable
and grip housing. 7-15, 7-24
Drive chain 
Check chain slack.
 Adjust if necessary.
 Check chain condition.
 Lubricate if necessary. 7-22, 7-23
Wheels and tires 
Check for damage.
 Check tire condition and tread depth.
 Check air pressure.
 Correct if necessary.
 Check for loose spokes and tighten if necessary. 7-15, 7-17
Shift pedal 
Make sure that operation is smooth.
 Correct if necessary. 7-19
Brake pedal 
Make sure that operation is smooth.
 Lubricate pedal pivoting point if necessary. 7-25
Brake and clutch levers 
Make sure that operation is smooth.
 Lubricate lever pivoting points if necessary. 7-24
Steering Check that the handlebar can be turned smoothly and has no excessive play. 7-26
ITEM CHECKS PAGE
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FOR YOUR SAFETY – PRE-OPERATION CHECKS
5-3
5
Front fork and rear shock ab-
sorber assembly 
Check that they operate smoothly and there is no oil leakage. 4-7, 4-9, 4-9, 7-26
Chassis fasteners 
Make sure that all nuts, bolts and screws are properly tightened.
 Tighten if necessary. —
Moving parts and cables 
Check that the control cables move smoothly.
 Check that the control cables are not caught when the handlebars are turned or
when the front forks travel up and down.
 Lubricate moving parts and cables if necessary. 7-23, 7-24, 7-25, 7-25
Exhaust system 
Check that the exhaust pipe is tightly mounted and has no cracks.
 Check for leakage. —
Ignition system Check that all leads and cables are properly connected. 7-8
ITEM CHECKS PAGE
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OPERATION AND IMPORTANT RIDING POINTS
6-1
6
EAU15951
Read the Owner’s Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWA10271
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which could cause an accident
or injury.
EAU41307
Starting and warming up a
cold engine 1. Turn the fuel cock lever to “ON ”.
2. Shift the transmission into the neu- tral position.
3. Turn the starter (choke) on and completely close the throttle. (See
page 4-6.)
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
ECA11042
For maximum engine life, never ac-
celerate hard when the engine is
cold!
EAU16660
Starting a warm engine Follow the same procedure as for start-
ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm. Instead, start
the engine with the throttle slightly
open.TIPIf the engine does not start after several
kicks, try again with the throttle 1/4 to
1/2 open.
U1SN80E0.book Page 1 Thursday, June 9, 2011 11:24 AM

OPERATION AND IMPORTANT RIDING POINTS
6-2
6
EAU16671
Shifting Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the il-
lustration.TIPTo shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of its
travel, and then slightly raise it.
NOTICE
ECA10260


Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.


Always use the clutch while
changing gears to avoid damag-
ing the engine, transmission,
and drive train, which are not
designed to withstand the
shock of forced shifting.
EAU16690
To start out and accelerate1. Pull the clutch lever to disengage the clutch.
2. Shift the transmission into first gear.
3. Open the throttle gradually and si- multaneously release the clutch le-
ver 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.
EAU16710
To decelerate1. 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.
1. Shift pedal
2. Neutral positionU1SN80E0.book Page 2 Thursday, June 9, 2011 11:24 AM

OPERATION AND IMPORTANT RIDING POINTS
6-3
6
EAU41503
Engine break-in
WARNING
EWA10321
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer perform
service.1. Before starting the engine, fill thefuel tank with a break-in oil-fuel
mixture as follows.
2. Start and warm up the engine. Check the operation of the controls
and the engine stop button. (See
page 4-1.)
3. Operate the motorcycle in the low- er gears at moderate throttle open-
ings for five to eight minutes. Stop
the engine and check the spark plug condition (see page 7-8); it
will show a rich condition during
break-in.
4. Allow the engine to cool. Restart the engine and operate the motor-
cycle as in the step above for five
minutes. Then, very briefly shift to
the higher gears and check the
full-throttle response. Stop the en-
gine and check the spark plug.
5. After again allowing the engine to cool, restart and run the motorcy-
cle for five more minutes. Full
throttle and the higher gears may
be used, but sustained full-throttle
operation should be avoided. Stop
the engine and check the spark
plug again.
6. Allow the engine to cool, remove the cylinder head and cylinder, and
inspect the piston and cylinder.
Remove any high spots on the pis-
ton with #600-grit wet sandpaper.
Clean all components and careful-
ly reassemble the cylinder head
and cylinder.
7. Drain the break-in oil-fuel mixture from the fuel tank and refill with the
specified mix. (See page 4-3.) 8. Start the engine and check the op-
eration of the motorcycle through-
out its entire operating range. Stop
the engine and check the spark
plug condition. Restart the motor-
cycle and ride it for about 10 to 15
more minutes. The motorcycle will
now be ready to ride normally.
After the engine break-in period, thor-
oughly check the motorcycle for loose
parts, oil leakage and any other prob-
lems. Be sure to inspect and make ad-
justments thoroughly, especially cable
and drive chain slack and loose
spokes. In addition, check all fittings
and fasteners for looseness, and tight-
en if necessary.
NOTICE
ECA15560


When any of the following parts
have been replaced, they must
be broken in.
Cylinder or crankshaft:
About one hour of break-in op-
eration is necessary.
Piston, rings or transmission
gears:
Recommended 2-stroke engine oil: See page 9-1.
Mixing ratio (gasoline to oil): 15:1
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OPERATION AND IMPORTANT RIDING POINTS
6-4
6These parts require about 30
minutes of break-in operation at
half-throttle or less. Observe the
condition of the engine carefully
during operation.


If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-
cle.
EAU17191
Parking When parking, stop the engine, and
then turn the fuel cock lever to
“OFF ”.
WARNING
EWA10311


Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.


Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.


Do not park near grass or other
flammable materials which
might catch fire.
U1SN80E0.book Page 4 Thursday, June 9, 2011 11:24 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-4
7
NO.ITEM ROUTINEAfter
break-in Every
race Every
third race Every
fifth race As
required
√
√
√
13
*Carburetor 
Check carburetor settings and for obstructions. √
 Adjust and clean. √
14 Spark plug 
Check condition.
 Clean and regap. √
 Replace. √
15 Drive chain 
Check chain slack, alignment and condition.
 Adjust and thoroughly lubricate chain with Yamaha
chain and cable lube or equivalent. √
√
√
√
√
 Replace. √
16 * *
Cooling system 
Check coolant level and for leakage. √
√
 Check hoses for cracks or damage. √
 Check radiator cap spring operation. √
 Change coolant. Every 2 years √
17 *Chassis fasteners 
Check all chassis fitting and fasteners.
 Correct or tighten if necessary. √
18 Air filter element 
Clean.
√
 Replace. √
19 *Frame Clean and check for damage. √
20 *Fuel line Clean and check for leakage. √√
U1SN80E0.book Page 4 Thursday, June 9, 2011 11:24 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-5
7
√ √
21 *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√
22 *Front fork
Replace oil seals.

Replace fork oil.

Clean dust seal and lubricate with lithium-soap-based
grease.
Adjust if necessary.

Check operation and for oil leakage.
√
√√√
NO. ITEM ROUTINE
After
break-in Every
race Every
third race Every
fifth race As
required
√
√
√
23 *Shock absorber assem-
bly 
Check operation and adjust.
 Tighten if necessary.
 Lubricate with
lithium-soap-based grease
. √(After
washing the
motorcycle or riding in the rain)
U1SN80E0.book Page 5 Thursday, June 9, 2011 11:24 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-6
7
EAU42011
TIP

Hydraulic brake service Regularly check and, if necessary, correct the brake fluid levels.
√
√√
√
24
*Drive chain roller and
support guide

Replace if necessary.

Check for wear or damage.
√
25 *Rear suspension 
Check operation and tighten if necessary.
 Lubricate with
lithium-soap-based grease
.
NO. ITEM ROUTINEAfter
break-in Every
race Every
third race Every
fifth race As
required
√ √√
√
√ √
√
√ √
√
√
√ √
√
√
26
*Steering head 
Check operation, free play, and tighten if necessary.
 Clean and lubricate with lithium-soap-based grease.
 Replace bearings.
27 *Tires and wheels 
Check tire air pressure, wheel runout, spokes for
looseness, and tires for wear.
 Tighten sprocket bolts if necessary.
 Check wheel bearings for looseness.
 Lubricate wheel bearings with lithium-soap-based
grease.
 Replace wheel bearings.
28 *Moving parts and ca-
bles 
Lubricate.
29 *Throttle grip 
Check operation.
 Check throttle grip free play, and adjust if necessary.
 Lubricate cable and grip housing.
U1SN80E0.book Page 6 Thursday, June 9, 2011 11:24 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-11
7
is not available, use distilled wa-
ter or soft tap water instead. Do
not use hard water or salt water
since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti- freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10472]
EAUM1315
To change the coolant1. Place the vehicle on a level sur- face and let the engine cool if nec-
essary.
2. Place a container under the engine to collect the used coolant.
3. Remove the coolant drain bolt and its gasket, and then the radiator
cap to drain the cooling system. WARNING! Never attempt to re-
move the radiator cap when the
engine is hot.
[EWA10381]
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.1. Coolant drain bolt
2. Gasket
1. Radiator cap
1
1
2
Tightening torque:Coolant drain bolt: 10 Nm (1.0 m ·kgf, 7.2 ft ·lbf)
Antifreeze/water mixture ratio: 1:1
Recommended antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibi-
tors for aluminum engines
Coolant quantity: Radiator capacity (including all
routes):
0.54 L (0.57 US qt, 0.48 Imp.qt)
U1SN80E0.book Page 11 Thursday, June 9, 2011 11:24 AM