engine YAMAHA YZ85 2013 Owner's Guide

SPECIFICATIONS
9-1
9
Dimensions:Overall length:YZ85 1818 mm (71.6 in)
YZ85D 1818 mm (71.6 in)
YZ85LW 1903 mm (74.9 in)
YZ85LWD 1903 mm (74.9 in)
Overall width:
758 mm (29.8 in)
Overall height: YZ85 1161 mm (45.7 in)
YZ85D 1161 mm (45.7 in)
YZ85LW 1205 mm (47.4 in)
YZ85LWD 1205 mm (47.4 in)
Seat height: YZ85 864 mm (34.0 in)
YZ85D 864 mm (34.0 in)
YZ85LW 904 mm (35.6 in)
YZ85LWD 904 mm (35.6 in)
Wheelbase:
YZ85 1255 mm (49.4 in)
YZ85D 1255 mm (49.4 in)
YZ85LW 1286 mm (50.6 in)
YZ85LWD 1286 mm (50.6 in)
Ground clearance: YZ85 351 mm (13.82 in)
YZ85D 351 mm (13.82 in)
YZ85LW 393 mm (15.47 in)
YZ85LWD 393 mm (15.47 in)Weight:Curb weight:
YZ85 71 kg (157 lb)
YZ85D 71 kg (157 lb)
YZ85LW 73 kg (161 lb)
YZ85LWD 73 kg (161 lb)
Engine:Engine type:Liquid cooled 2-stroke
Cylinder arrangement:
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 2RTransmission 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 ratio:
3.611 (65/18)
Final drive: Chain
Secondary reduction ratio: YZ85 3.428 (48/14)
YZ85D 3.428 (48/14)
YZ85LW 3.714 (52/14)
YZ85LWD 3.714 (52/14)
Transmission type:
Constant mesh 6-speed
Operation: Left foot operation
Gear ratio: 1st:2.454 (27/11)
2nd: 1.882 (32/17)
3rd:
1.529 (26/17)
4th: 1.294 (22/17)
U1SN81E0.book Page 1 Tuesday, June 12, 2012 3:17 PM

INDEXAAir filter element, cleaning..................... 7-12BBrake and clutch levers, checking and lubricating ..................... 7-24
Brake fluid, changing ............................ 7-22
Brake fluid level, checking .................... 7-20
Brake lever .............................................. 4-2
Brake lever free play, checking ............. 7-19
Brake pedal ............................................. 4-2
Brake pedal, checking and lubricating ..................... 7-25CCables, checking and lubricating .......... 7-24
Carburetor, adjusting ............................ 7-14
Care ........................................................ 8-1
Clutch lever ............................................. 4-1
Clutch lever free play, adjusting ............ 7-18
Coolant.................................................. 7-10DDrive chain, cleaning and lubricating .... 7-23
Drive chain slack ................................... 7-22EEngine 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 .... 7-20
Front fork, adjusting ................................ 4-7
Front fork, bleeding ................................. 4-9
Front fork, checking .............................. 7-26
Fuel ......................................................... 4-3
Fuel cock................................................. 4-5 Fuel 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 ................................ 7-27 Storage.................................................... 8-3
Supporting the motorcycle .................... 7-27
Swingarm pivots, lubricating ................. 7-26
TThrottle grip and cable,
checking and lubricating ..................... 7-24
Throttle grip free play, adjusting ............ 7-15
Tires ...................................................... 7-15
Transmission oil ...................................... 7-9
Troubleshooting .................................... 7-31
Troubleshooting charts.......................... 7-32VVehicle identification number ................ 10-1WWheel bearings, checking ..................... 7-27
Wheel (front) ......................................... 7-28
Wheel (rear) .......................................... 7-29
Wheels .................................................. 7-17
U1SN81E0.book Page 1 Tuesday, June 12, 2012 3:17 PM