SPEC
2 - 2
GENERAL SPECIFICATIONS
Fuel:
Type Premium unleaded gasoline only with a
research octane number of 95 or higher.
Tank capacity 5.0 L (1.10 Imp gal, 1.32 US gal)
Carburetor:
Type/manufacturer PWK28/KEIHIN
Spark plug:
Type/manufacturer BR10EG/NGK (resistance type)
Gap 0.5 ~ 0.6 mm (0.020 ~ 0.024 in)
Clutch type: Wet, multiple-disc
Transmission: YZ85 YZ85LW
Primary reduction system Gear←
Primary reduction ratio 65/18 (3.611)←
Secondary reduction system Chain drive←
Secondary reduction ratio 47/14 (3.357) 52/14 (3.714)
(USA, ZA)
48/14 (3.429)
(EUROPE, CDN, AUS,
NZ)
Transmission type Constant mesh,
6-speed←
Operation Left foot operation←
Gear ratio: 1st 27/11 (2.454)←
2nd 32/17 (1.882)←
3rd 26/17 (1.529)←
4th 22/17 (1.294)←
5th 26/23 (1.130)←
6th 25/25 (1.000)←
Chassis: YZ85 YZ85LW
Frame type Semi double cradle←
Caster angle 26.3°26.9°
Trail 88 mm (3.46 in) 105.5 mm (4.15 in)
Tire: YZ85 YZ85LW
Type With tube←
Size (front) 70/100-17 40M 70/100-19 42M
Size (rear) 90/100-14 49M 90/100-16 52M
Tire pressure (front and rear) 100 kPa
(1.0 kgf/cm
2, 15 psi)←
Brake:
Front brake type Single disc brake
Operation Right hand operation
Rear brake type Single disc brake
Operation Right foot operation
1
2
3
4
5
6
7
7 - 11
TUNSETTING
EC72N000
Drive and driven sprockets setting parts
YZ85:
*For USA and ZA
**For EUROPE, CDN, AUS and NZ
YZ85LW:
Part name Size Part number
Drive (STD)
Sprocket
114T
15T9382A-14227
9382A-15228
Real wheel
sprocket
2*(STD)
** (STD)46T
47T
48T
49T5PA-25446-00
4ES-25447-10
5PA-25448-00
5PA-25449-00
Part name Size Part number
Drive (STD)
sprocket
1 14T
15T9382A-14227
9382A-15228
Real wheel
sprocket
2(STD)51T
52T
53T5PA-25451-00
5PA-25452-00
5PA-25453-00
5PA70120
EC721002
Tire pressure
Tire pressure should be adjust to suit the road
surface condition of the circuit.
Under a rainy, muddy, sandy, or slippery
condition, the tire pressure should be lower
for a larger area of contact with the road sur-
face.
Under a stony or hard road condition, the tire
pressure should be higher to prevent a flat
tire.
Standard tire pressure:
100 kPa (1.0 kgf/cm2, 15 psi)
Extent of adjustment:
60 ~ 80 kPa
(0.6 ~ 0.8 kgf/cm
2, 9.0 ~ 12 psi)
Extent of adjustment:
100 ~ 120 kPa
(1.0 ~ 1.2 kgf/cm
2, 15 ~ 18 psi)
