Yamaha 2009 YFM25RY Service Manual page 21

Spark plug (s)
Manufacturer/model
Spark plug gap
Clutch type
Transmission
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
Operation
1st
2nd
3rd
4th
5th
Chassis
Frame type
Caster angle
Camber angle
Kingpin angle
Trail
Tread rear (STD)
Tread front (STD)
Toe-in (with tire touching the ground)
Front tire
Type
Size
Manufacturer/model
Rear tire
Type
Size
Manufacturer/model
Tire air pressure (measured on cold tires)
Maximum loading limit
Off-road riding
Front
Rear
Front brake
Type
Operation
Rear brake
Type
Operation
Front suspension
Type
Spring/shock absorber type
Wheel travel
GENERAL SPECIFICATIONS
NGK/DR7EA
0.6–0.7 mm (0.024–0.028 in)
Wet, multiple-disc
Spur gear
76/22 (3.455)
Chain drive
38/14 (2.714)
Constant mesh 5-speed
Left foot operation
37/13 (2.846)
33/18 (1.833)
29/21 (1.381)
27/24 (1.125)
28/29 (0.966)
Steel tube frame
6 °
-1.5 °
14.8 °
23.0 mm (0.91 in)
824.0 mm (32.44 in)
826.0 mm (32.52 in)
9.0–19.0 mm (0.35–0.75 in)
Tubeless
AT20 × 7-10
DUNLOP/KT201
Tubeless
AT19 × 10-9
DUNLOP/KT205A
100.0 kg (220 lb)
27.5 kPa (0.28 kgf/cm
27.5 kPa (0.28 kgf/cm
Dual disc brake
Right hand operation
Single disc brake
Right foot operation
Double wishbone
Coil spring/oil damper (4D3D)
Coil spring/gas-oil damper (4D3H, 4D3M)
190 mm (7.5 in)
2-2
2
, 4.0 psi)
2
, 4.0 psi)