Yamaha YZ125 2008 User Manual

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MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Transmission type Constant mesh, 6-speed
Operation Left foot operation
Gear ratio:
1st 31/13 (2.385)
2nd 29/15 (1.933)
3rd 27/17 (1.588)
4th 23/17 (1.353)
5th 24/20 (1.200)
6th 23/21 (1.095)
Chassis: USA, ZA, AUS, NZ EUROPE, CDN
Frame type Semi double cradle
←
Caster angle 25.5 ° 25.6 °
Trail 105 mm (4.13 in) 107 mm (4.21 in)
Tire:
Type With tube
Size (front) 80/100-21 51M
Size (rear) 100/90-19 57M
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
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (link type monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel:
Front wheel travel 300 mm (11.8 in)
Rear wheel travel 315 mm (12.4 in)
Electrical:
Ignition system CDI magneto
Item Standard Limit
Cylinder head:
Combustion chamber capacity 8.4 cm
3
(0.296 Imp oz, 0.284 US oz) ----
Warp limit ---- 0.03 mm
(0.0012 in)
Cylinder:
Bore size 54.000–54.014 mm (2.1260–2.1265 in) 54.1 mm
(2.130 in)
Taper limit ---- 0.05 mm
(0.0020 in)

Yamaha YZ125 2008 Specifications

General

Bore x Stroke	54.0mm x 54.5mm
Compression Ratio	8.6~10.7:1
Ignition	CDI
Final Drive	Chain
Front Brake	Hydraulic single disc brake
Rear Brake	Hydraulic single disc brake
Front Tire	80/100-21
Rear Tire	100/90-19
Wheelbase	56.8 in
Fuel Capacity	2.1 gal
Engine Type	Liquid-cooled, 2-stroke
Fuel Delivery	Mikuni TMX38
Front Suspension	11.8-in travel
Rear Suspension	12.4-in travel
Transmission	6-speed, constant mesh