General information
Model:	Yamaha TT-R 90
Year:	2002
Category:	Cross / motocross
Engine and transmission
Displacement:	89.00 ccm (5.43 cubic inches)
Engine type:	Single cylinder
Stroke:	4
Power:	5.60 HP (4.1 kW)) @ 7000 RPM
Torque:	6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 4000 RPM
Compression:	8.5:1
Bore x Stroke:	47.0 x 51.8 mm (1.9 x 2.0 inches)
Fuel control:	SOHC
Cooling system:	Liquid
Physical measurements
Dry weight:	60.0 kg (132.3 pounds)
Seat height:	625 mm (24.6 inches) If adjustable, lowest setting.
Overall height:	865 mm (34.1 inches)
Overall length:	1,525 mm (60.0 inches)
Overall width:	605 mm (23.8 inches)
Ground clearance:	157 mm (6.2 inches)
Wheelbase:	1,040 mm (40.9 inches)
Chassis and dimensions
Front Suspension travel:	110 mm (4.3 inches)
Rear Suspension travel:	95 mm (3.7 inches)
Front brakes:	Expanding brake
Rear brakes:	Expanding brake
Speed and acceleration
Power/weight ratio:	0.0933 HP/kg