2010 YAMAHA YZ85 fuel filter

TABLE OF CONTENTS
LOCATION OF IMPORTANT
LABELS ............................................1-1
SAFETY INFORMATION .................. 2-1
DESCRIPTION .................................. 3-1
Left view .......................................... 3-1
Right view ........................................ 3-2
Controls and instruments ................3-3
INSTRUMENT AND CONTROL
FUNCTIONS....................................... 4-1
Handlebar switch ............................ 4-1
Clutch lever .................................... 4-1
Shift pedal ......................................4-1
Brake lever ..................................... 4-2
Brake pedal .................................... 4-2
Fuel tank cap .................................. 4-3
Fuel ................................................ 4-3
Fuel tank breather hose ................. 4-5
Fuel cock ........................................ 4-5
Starter (choke) knob ....................... 4-6
Kickstarter ......................................4-6
Seat ................................................ 4-7
Adjusting the front fork ................... 4-7
Front fork bleeding ......................... 4-9
Adjusting the shock absorber
assembly ..................................... 4-9
Removable sidestand ................... 4-12FOR YOUR SAFETY –
PRE-OPERATION CHECKS............. 5-1
OPERATION AND IMPORTANT
RIDING POINTS................................ 6-1
Starting and warming up a cold
engine ......................................... 6-1
Starting a warm engine .................. 6-1
Shifting ........................................... 6-2
Engine break-in .............................. 6-3
Parking ........................................... 6-4
PERIODIC MAINTENANCE AND
ADJUSTMENT................................... 7-1
Periodic maintenance and
lubrication chart .......................... 7-2
Checking the spark plug ................ 7-8
Transmission oil ............................. 7-9
Coolant ........................................ 7-10
Cleaning the air filter element ...... 7-12
Adjusting the carburetor ............... 7-14
Adjusting the engine idling
speed ........................................ 7-14
Adjusting the throttle cable free
play ........................................... 7-14
Tires ............................................. 7-15
Spoke wheels .............................. 7-17
Adjusting the clutch lever free
play ........................................... 7-17
Checking the front brake lever
free play .................................... 7-18Checking the shift pedal ............... 7-19
Checking the front and rear brake
pads .......................................... 7-19
Checking the brake fluid level ...... 7-20
Changing the brake fluid .............. 7-21
Drive chain slack .......................... 7-21
Cleaning and lubricating the drive
chain ......................................... 7-22
Checking and lubricating
the cables ................................. 7-23
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 swingarm pivots ... 7-24
Lubricating the rear suspension ... 7-25
Checking the front fork ................. 7-25
Checking the steering .................. 7-26
Checking the wheel bearings ....... 7-26
Supporting the motorcycle ........... 7-26
Front wheel .................................. 7-27
Rear wheel ................................... 7-28
Troubleshooting ........................... 7-29
Troubleshooting charts ................. 7-31
MOTORCYCLE CARE AND
STORAGE.......................................... 8-1
Matte color caution ......................... 8-1
Care ............................................... 8-1
U5PA88E0.book Page 1 Tuesday, June 9, 2009 8:44 AM

DESCRIPTION
3-1
3
EAU10410
Left view1. Radiator cap (page 7-10)
2. Fuel cock (page 4-5)
3. Shock absorber assembly spring preload adjusting nut (page 4-9)
4. Air filter element (page 7-12)
5. Seat (page 4-7)
6. Shift pedal (page 4-1)
7. Throttle stop screw (page 7-14)
8. Starter (choke) knob (page 4-6)
U5PA88E0.book Page 1 Tuesday, June 9, 2009 8:44 AM

INSTRUMENT AND CONTROL FUNCTIONS
4-5
4wash with soap and water. If gaso-
line spills on your clothing, change
your clothes.
EAU41360
Fuel tank breather hose Before operating the motorcycle:

Check the fuel tank breather hose
connection.


Check the fuel tank breather hose
for cracks or damage, and replace
it if damaged.


Make sure that the end of the fuel
tank breather hose is not blocked,
and clean it if necessary.
TIPIf the fuel tank breather hose falls out,
reinstall it on the fuel tank cap with the
arrow mark on the one-way valve point-
ed downward as shown.
EAU41280
Fuel cock The fuel cock supplies fuel from the
tank to the carburetor while filtering it al-
so.
The fuel cock has two positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not running.
1. Fuel tank breather hose
2. One-way valve
1. Arrow mark positioned over “OFF”
U5PA88E0.book Page 5 Tuesday, June 9, 2009 8:44 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-4
7
NO. ITEM ROUTINEAfter
break-inEvery
raceEvery
third raceEvery
fifth raceAs
required
√
√
√ 13*CarburetorCheck carburetor settings and for obstructions.√
Adjust and clean.√
14 Spark plugCheck condition.
Clean and regap.√
Replace.√
15 Drive chainCheck chain slack, alignment and condition.
Adjust and thoroughly lubricate chain with Yamaha
chain and cable lube or equivalent.√
√
√
√ √
Replace.√
16* *
Cooling systemCheck coolant level and for leakage.√ √
Check hoses for cracks or damage.√
Check radiator cap spring operation.√
Change coolant. Every 2 years√
17*Chassis fastenersCheck all chassis fitting and fasteners.
Correct or tighten if necessary.√
18*Air filter elementClean.
√
Replace.√
19*FrameClean and check for damage.√
20*Fuel line Clean and check for leakage.√√
U5PA88E0.book Page 4 Tuesday, June 9, 2009 8:44 AM

SPECIFICATIONS
9-1
9
Dimensions:Overall length:
YZ85 1818 mm (71.6 in)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)
(FRA)(GBR)(GRC)(IRL)(ITA)(NLD)(NOR)
(POL)(PRT)(SVN)(SWE)
YZ85 1821 mm (71.7 in) (ZAF)
YZ85LW 1903 mm (74.9 in)
YZ85LWZ 1903 mm (74.9 in)
YZ85Z 1818 mm (71.6 in)
Overall width:
758 mm (29.8 in)
Overall height:
YZ85 1161 mm (45.7 in)
YZ85LW 1205 mm (47.4 in)
YZ85LWZ 1205 mm (47.4 in)
YZ85Z 1161 mm (45.7 in)
Seat height:
YZ85 864 mm (34.0 in)
YZ85LW 904 mm (35.6 in)
YZ85LWZ 904 mm (35.6 in)
YZ85Z 864 mm (34.0 in)
Wheelbase:
YZ85 1255 mm (49.4 in)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)
(FRA)(GBR)(GRC)(IRL)(ITA)(NLD)(NOR)
(POL)(PRT)(SVN)(SWE)
YZ85 1258 mm (49.5 in) (ZAF)
YZ85LW 1286 mm (50.6 in)
YZ85LWZ 1286 mm (50.6 in)
YZ85Z 1255 mm (49.4 in)Ground clearance:
YZ85 351 mm (13.82 in)
YZ85LW 393 mm (15.47 in)
YZ85LWZ 393 mm (15.47 in)
YZ85Z 351 mm (13.82 in)
Weight:With oil and fuel:
YZ85 71.0 kg (157 lb)
YZ85LW 73.9 kg (163 lb)
YZ85LWZ 73.9 kg (163 lb)
YZ85Z 71.0 kg (157 lb)Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
84 cm³
Bore × stroke:
47.5 × 47.8 mm (1.87 × 1.88 in)
Compression ratio:
8.20 :1
Starting system:
Kickstarter
Lubrication system:
PremixEngine oil:Type:
YAMALUBE 2-RTransmission oil:Type:
YAMALUBE 4 (10W-40) or SAE 10W-40
Oil change quantity:
0.50 L (0.53 US qt, 0.44 Imp.qt)
Cooling system:Radiator capacity (including all routes):
0.54 L (0.57 US qt, 0.48 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Premium unleaded gasoline only
Fuel tank capacity:
5.0 L (1.32 US gal, 1.10 Imp.gal)Carburetor:Type × quantity:
PWK28 x 1Spark plug (s):Manufacturer/model:
NGK/BR10EG
Spark plug gap:
0.5–0.6 mm (0.020–0.024 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction system:
Spur gear
Primary reduction ratio:
65/18 (3.611)
Secondary reduction system:
Chain drive
U5PA88E0.book Page 1 Tuesday, June 9, 2009 8:44 AM

INDEX
AAir filter element, cleaning .................... 7-12BBrake and clutch levers, checking and
lubricating ........................................... 7-23
Brake fluid, changing ............................ 7-21
Brake fluid level, checking .................... 7-20
Brake lever ............................................. 4-2
Brake pedal ............................................ 4-2
Brake pedal, checking and
lubricating ........................................... 7-24CCables, checking and lubricating .......... 7-23
Carburetor, adjusting ............................ 7-14
Care ........................................................ 8-1
Clutch lever............................................. 4-1
Clutch lever free play, adjusting ........... 7-17
Coolant ................................................. 7-10DDrive chain, cleaning and lubricating .... 7-22
Drive chain slack .................................. 7-21EEngine break-in ...................................... 6-3
Engine idling speed .............................. 7-14
Engine, starting a warm .......................... 6-1
Engine stop button.................................. 4-1FFront and rear brake pads, checking .... 7-19
Front brake lever free play, checking ... 7-18
Front fork, adjusting ................................ 4-7
Front fork, bleeding................................. 4-9
Front fork, checking .............................. 7-25
Fuel......................................................... 4-3
Fuel cock ................................................ 4-5Fuel tank breather hose .......................... 4-5
Fuel tank cap........................................... 4-3
HHandlebar switch..................................... 4-1IIdentification numbers ........................... 10-1KKickstarter ............................................... 4-6LLabels, location .......................................1-1MMatte color, caution .................................8-1
Model label ............................................ 10-1PParking ....................................................6-4
Part locations .......................................... 3-1
Periodic maintenance and lubrication
chart ......................................................7-2RRear suspension, lubricating ................. 7-25SSafety information ...................................2-1
Seat ......................................................... 4-7
Shifting ....................................................6-2
Shift pedal ............................................... 4-1
Shift pedal, checking ............................. 7-19
Shock absorber assembly, adjusting ...... 4-9
Sidestand .............................................. 4-12
Spark plug, checking ...............................7-8
Specifications .......................................... 9-1
Starter (choke) knob................................ 4-6
Starting and warming up a cold engine ... 6-1
Steering, checking.................................7-26
Storage....................................................8-3Supporting the motorcycle .................... 7-26
Swingarm pivots, lubricating ................. 7-24
TThrottle cable free play, adjusting ......... 7-14
Throttle grip and cable, checking and
lubricating ........................................... 7-23
Tires ...................................................... 7-15
Transmission oil ...................................... 7-9
Troubleshooting .................................... 7-29
Troubleshooting charts ......................... 7-31VVehicle identification number ................ 10-1WWheel bearings, checking..................... 7-26
Wheel (front) ......................................... 7-27
Wheel (rear) .......................................... 7-28
Wheels .................................................. 7-17
U5PA88E0.book Page 1 Tuesday, June 9, 2009 8:44 AM