Yamaha TT-R90(V) Owner's Service Manual page 62

Transmission:
Primary reduction system
Primary reduction ratio
Secondary reduction system
Secondary reduction ratio
Transmission type
Operation
Gear ratio:
Chassis:
Frame type
Caster angle
Trail
Tire:
Type
Size (front)
Size (rear)
Manufacturer (front and rear)
Type (front and rear)
Tire pressure (front and rear)
Brake:
Front brake type
Operation
Rear brake type
Operation
Suspension:
Front suspension
Rear suspension
Shock absorber:
Front shock absorber
Rear shock absorber
Wheel travel:
Front wheel travel
Rear wheel travel
Electrical:
Ignition system
Generator system (TT-R90E)
Battery type (TT-R90E)
Battery voltage/capacity (TT-R90E)
Specific gravity (TT-R90E)
GENERAL SPECIFICATIONS
Spur gear
67/18 (3.722)
Chain drive
35/14 (2.500)
Constant mesh, 3-speed
Left foot operation
1st 37/13 (2.846)
2nd 33/19 (1.736)
3rd 28/23 (1.217)
Steel tube backbone
24.83°
56.0 mm (2.2 in)
With tube
2.50-14 4PR
3.00-12 4PR
CHENG SHIN
KNOBBY
100 kPa (1.00 kgf/cm
Drum brake
Right hand operation
Drum brake
Right foot operation
Telescopic fork
Swingarm (monocross suspension)
Coil spring/oil damper
Coil spring/gas, oil damper
110 mm (4.33 in)
95 mm (3.74 in)
CDI
CDI magneto
GT4B-5
12 V/2.5 AH
1.350
2 - 3
SPEC
2
, 14.5 psi)