2006 YAMAHA YZ85 transmission oil

ILLUSTRATED SYMBOLS
(Refer to the illustration)
Illustrated symbols 1 to 7 are designed as
thumb tabs to indicate the chapter’s number
and content.
1General information
2Specifications
3Regular inspection and adjustments
4Engine
5Chassis
6Electrical
7Tuning
Illustrated symbols 8 to D are used to identify
the specifications appearing in the text.
8With engine mounted
9Special tool
0Filling fluid
ALubricant
BTightening
CSpecified value, Service limit
DResistance (
Ω), Voltage (V), Electric current (A)
Illustrated symbols E to I in the exploded
diagrams indicate grade of lubricant and loca-
tion of lubrication point.
EApply transmission oil
FApply engine oil
GApply molybdenum disulfide oil
HApply lightweight lithium-soap base grease
IApply molybdenum disulfide grease
Illustrated symbols J to K in the exploded
diagrams indicate where to apply a locking
agent and where to install new parts.
JApply locking agent (LOCTITE®)
KUse new one 12
34
56
78
90
AB
CD
EFG
HI
JK
GEN
INFO
SPEC
INSP
ADJ
ENG
CHAS–+ELEC
TUN
T R..
EMG
BM

SPEC
2 - 1
GENERAL SPECIFICATIONS
EC200000
SPECIFICATIONS
EC211000
GENERAL SPECIFICATIONS
Model name: YZ85 YZ85LW
YZ85V (USA, CDN,
AUS, NZ)
YZ85 (EUROPE, ZA)YZ85LW (EUROPE)
YZ85LWV (AUS, NZ)
Model code number: YZ85 YZ85LW
5PAD
(USA, CDN, EUROPE,
ZA)
5PAE
(AUS, NZ)5SHD
(EUROPE)
5SHE
(AUS, NZ)
Dimensions: YZ85 YZ85LW
Overall length 1,821 mm (71.7 in) 1,903 mm (74.9 in)
(USA, ZA)
1,818 mm (71.6 in)
(EUROPE, CDN, AUS,
NZ)
Overall width 758 mm (28.9 in)←
Overall height 1,161 mm (45.7 in) 1,205 mm (47.4 in)
Seat height 864 mm (34.0 in) 904 mm (35.6 in)
Wheelbase 1,258 mm (49.5 in) 1,286 mm (50.6 in)
(USA, ZA)
1,255 mm (49.4 in)
(EUROPE, CDN, AUS,
NZ)
Minimum ground clearance 351 mm (13.8 in) 393 mm (15.5 in)
Dry weight: YZ85 YZ85LW
Without oil and fuel 66 kg (145.5 lb) 69 kg (152.1 lb)
Engine:
Engine type Liquid cooled 2-stroke, gasoline
Cylinder arrangement Single cylinder, forward inclined
Displacement 84.7 cm
3 (2.98 Imp oz, 2.86 US oz)
Bore × stroke 47.5 × 47.8 mm (1.870 × 1.882 in)
Compression ratio 8.2 : 1
Starting system Kickstarter
Lubrication system: Premix (30 : 1) (Yamalube 2-R)
Oil type or grade (2-cycle):
Transmission oil Yamalube 4 (10W-30) or SAE 10W-30 type SE
motor oil
Periodic oil change 0.50 L (0.44 Imp qt, 0.52 US qt)
Total amount 0.55 L (0.48 Imp qt, 0.58 US qt)
Coolant capacity (including all routes): 0.54 L (0.48 Imp qt, 0.57 US qt)
Air filter: Wet type element
2

SPEC
2 - 7
MAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Spark plug M14 × 1.25 1 20 2.0 14
Cylinder head (nut) M8 × 1.25 4 30 3.0 22
(stud bolt) M8 × 1.25 4 13 1.3 9.4
Cylinder (nut) M8 × 1.25 4 28 2.8 20
(stud bolt) M8 × 1.25 4 13 1.3 9.4
Impeller M8 × 1.25 1 14 1.4 10
Coolant drain bolt M6 × 1.0 1 10 1.0 7.2
Water pump housing M6 × 1.0 2 10 1.0 7.2
Radiator hose clamp M6 × 1.0 4 1 0.1 0.7
Air filter element M6 × 1.0 1 2 0.2 1.4
Carburetor joint M6 × 1.0 4 8 0.8 5.8
Reed valve M3 × 0.5 4 1 0.1 0.7
Exhaust pipe M6 × 1.0 2 12 1.2 8.7
Exhaust pipe stay M6 × 1.0 1 12 1.2 8.7
Silencer M6 × 1.0 1 12 1.2 8.7
Fiber (silencer) M6 × 1.0 2 12 1.2 8.7
Crankcase M6 × 1.0 11 8 0.8 5.8
Left crankcase cover M6 × 1.0 4 5 0.5 3.6
Right crankcase cover M6 × 1.0 4 10 1.0 7.2
Right crankcase cover M6 × 1.0 1 10 1.0 7.2
Clutch cover M6 × 1.0 6 10 1.0 7.2
Transmission oil drain bolt M8 × 1.25 1 10 1.0 7.2
Kickstarter crank M6 × 1.0 1 10 1.0 7.2
Primary drive gear M12 × 1.0 1 79 7.9 57
Clutch boss M12 × 1.0 1 70 7.0 50
Clutch spring M5 × 0.8 5 6 0.6 4.3
Drive sprocket M16 × 1.0 1 60 6.0 43
Crankcase bearing stopper M6 × 1.0 2 8 0.8 5.8
Crankcase oil seal holder M8 × 1.25 1 20 2.0 14
Shift pedal M6 × 1.0 1 10 1.0 7.2

SPEC
2 - 9
CARACTERISTIQUES D’ENTRETIEN
Roue:
Type de roue avant Roue à rayons ----
Type de roue arrière Roue à rayons ----
Taille/matériau de la jante avant 17 × 1,40/Aluminium ----
Taille/matériau de la jante arrière 14 × 1,60/Aluminium ----
Limite de voilage de la jante:
Radial ---- 2,0 mm (0,08 in)
Latéral ---- 2,0 mm (0,08 in)
Chaîne de transmission:
Type/fabricant DID428DS/DAIDO ----
Nombre de maillons 117 maillons + attache ----
Jeu de la chaîne 35
à 45 mm (1,4 à 1,8 in) ----
Longueur de la chaîne (15 maillons) ---- 194,3 mm (7,65 in)
Frein à disque avant:
Diamètre extérieur × Epaisseur 220 × 3,0 mm (8,66 × 0,12 in) 220 × 2,5 mm
(8,66 × 0,10 in)
Limite de déflexion ---- 0,15 mm (0,006 in)
Epaisseur de plaquette 4,0 mm (0,16 in) 0,8 mm (0,03 in)
Diamètre intérieur du maître cylindre 11,0 mm (0,433 in) ----
Diamètre intérieur du cylindre d’étrier 22,22 mm (0,875 in) × 2 ----
Type de liquide de frein DOT n° 4 ----
Frein à disque arrière:
Diamètre extérieur × Epaisseur 190 × 3,0 mm (7,84 × 0,12 in) 190 × 2,5 mm
(7,84 × 0,12 in)
Limite de déflexion ---- 0,15 mm (0,006 in)
Epaisseur de plaquette 3,7 mm (0,15 in) 1,0 mm (0,04 in)
Diamètre intérieur du maître cylindre 12,7 mm (0,500 in) ----
Diamètre intérieur du cylindre d’étrier 27,0 mm (1,063 in) × 1 ----
Type de liquide de frein DOT n° 4 ----
Levier et pédale de frein:
Position du levier de frein 95 mm (3,74 in) ----
Hauteur de la pédale de frein
(distance verticale sous le sommet du
repose-pied)4 à 10 mm (0,16 à 0,39 in) ----
Jeu du levier d’embrayage
(extrémité du levier)10
à 15 mm (0,39 à 0,59 in) ----
Jeu de la poignée des gaz 3
à 5 mm (0,12 à 0,20 in) ---- Elément Standard Limite

SPEC
2 - 11
CARACTERISTIQUES D’ENTRETIEN
Roue:
Type de roue avant Roue à rayons ----
Type de roue arrière Roue à rayons ----
Taille/matériau de la jante avant 19 × 1,40/Aluminium ----
Taille/matériau de la jante arrière 16 × 1,85/Aluminium ----
Limite de voilage de la jante:
Radial ---- 2,0 mm (0,08 in)
Latéral ---- 2,0 mm (0,08 in)
Chaîne de transmission:
Type/fabricant DID428DS/DAIDO ----
Nombre de maillons 123 maillons + attache ----
Jeu de la chaîne 35
à 45 mm (1,4 à 1,8 in) ----
Longueur de la chaîne (15 maillons) ---- 194,3 mm (7,65 in)
Frein à disque avant:
Diamètre extérieur × Epaisseur 220 × 3,0 mm (8,66 × 0,12 in) 220 × 2,5 mm
(8,66 × 0,10 in)
Limite de déflexion ---- 0,15 mm (0,006 in)
Epaisseur de plaquette 4,0 mm (0,16 in) 0,8 mm (0,03 in)
Diamètre intérieur du maître cylindre 11,0 mm (0,433 in) ----
Diamètre intérieur du cylindre d’étrier 22,22 mm (0,875 in) × 2 ----
Type de liquide de frein DOT n° 4 ----
Frein à disque arrière:
Diamètre extérieur × Epaisseur 190 × 3,0 mm (7,84 × 0,12 in) 190 × 2,5 mm
(7,84 × 0,12 in)
Limite de déflexion ---- 0,15 mm (0,006 in)
Epaisseur de plaquette 3,7 mm (0,15 in) 1,0 mm (0,04 in)
Diamètre intérieur du maître cylindre 12,7 mm (0,500 in) ----
Diamètre intérieur du cylindre d’étrier 27,0 mm (1,063 in) × 1 ----
Type de liquide de frein DOT n° 4 ----
Levier et pédale de frein:
Position du levier de frein 95 mm (3,74 in) ----
Hauteur de la pédale de frein
(distance verticale sous le sommet du
repose-pied)4 à 10 mm (0,16 à 0,39 in) ----
Jeu du levier d’embrayage
(au pivot du levier)10
à 15 mm (0,39 à 0,59 in) ----
Jeu de la poignée des gaz 3
à 5 mm (0,12 à 0,20 in) ---- Elément Standard Limite

2 - 16
SPEC
EC240000
CABLE ROUTING DIAGRAM
1Hose guide
2Brake hose
3Throttle cable
4Fuel tank breather hose
5Engine stop switch lead
6CDI magneto lead
7Clamp
8Carburetor breather hose
9Carburetor overflow hose
0Transmission oil breather hose
ARadiator breather hose
BClutch cable
CSpark plug leadDCable guide
EBrake hose holder
ÈPass the fuel tank breather hose between the
handlebar and tension bar, then insert its end
into the hole of the steering stem.
ÉFasten the ground lead together with the ignition
coil.
ÊClamp the brake hose with the brake hose
holder.
ËFit the brake hose into the guides of the protec-
tor.
CABLE ROUTING DIAGRAM

2 - 17
SPEC
1Sub-wire harness
2CDI unit
3Ignition coil
4Clutch cable
5Cable guide
6Transmission oil breather hose
7CDI unit band
8Clamp
9Brake hose
0Brake hose holder
AHose guide
BReservoir hose
CReservoir tank
DBrake master cylinderÈPass the transmission oil breather hose through
the hose guide.
ÉClamp the sub-wire harness at the tape on it
within the arrow mark.
ÊPass the sub-wire harness on the left of the CDI
unit.
ËPass the reservoir hose between the brake hose
and swingarm bracket.
ÌPass the reservoir hose through the hose guides.
ÍInstall the brake hose so that its pipe portion
directs as shown and lightly touches the projec-
tion on the brake master cylinder.
CABLE ROUTING DIAGRAM

3 - 1
INSP
ADJ
MAINTENANCE INTERVALS
EC300000
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind
that such factors as weather, terrain, geographical location, and individual usage will alter the
required maintenance and lubrication intervals. If you are a doubt as to what intervals to follow in
maintaining and lubricating your machine, consult your Yamaha dealer.
ItemAfter
break-inEvery
raceEvery
third
raceEvery
fifth
raceAs re-
quiredRemarks
PISTON
Inspect and clean
Replace







Inspect crack
Inspect carbon deposits
and eliminate them
PISTON RING
Inspect
Replace





Check ring end gap
PISTON PIN, SMALL END BEARING
Inspect
Replace




CYLINDER HEAD
Inspect and clean
Retighten







Inspect carbon deposits
and eliminate them
Check gasket
CYLINDER
Inspect and clean
Replace




Inspect score marks
Inspect wear
CLUTCH
Inspect and adjust
Replace





Inspect housing, friction
plate, clutch plate and
spring
TRANSMISSION
Replace oil
Inspect
Replace bearing






Yamalube 4 (10W-30) or
SAE 10W-30 SE motor oil
SHIFT FORK, SHIFT CAM, GUIDE BAR
Inspect

Inspect wear
ROTOR NUT
Retighten




KICK SHAFT
Inspect idle gear
Replace




EXHAUST PIPE, SILENCER
Inspect
Clean





CRANK
Inspect and clean



CARBURETOR
Inspect, adjust and clean



SPARK PLUG
Inspect and clean
Replace





DRIVE CHAIN
Lubricate, slack, alignment
Replace




Chain slack: 35 ~ 45 mm
(1.4 ~ 1.8 in)