Yamaha IT 250 (1982-83)

The Yamaha IT 250 was produced from 1982-83 and had a two-stroke, single cylinder, read valve engine with a capacity of 246cc. It had a compression ratio of 9.8;1, an upswept expansion chamber with a USFS-approved spark arrestor and silencer for its exhaust system, and used a 30mm Mikunis carburetor for induction. The CDI ignition and kick start allowed for a max power of 32.2 hp at 7500 rpm with a max torque of 22.6/3.12 kg-m at the same speed. The motorcycle had a six-speed transmission with a final drive of chain and had a frame of single-downtube, full-cradle chrome-moly frame with aluminum box-section swing arm. The front suspension was air-assisted, oil-damped fork with a wheel travel of 380 mm and the rear suspension had an aluminum-bodied monoshock with adjustable damping and preload for a wheel travel of 270 mm. It was fitted with drum brakes and had a front tyre of 90/90-21 and a rear tyre of 12/90-18, with a wheelbase of 1450 mm and a wet weight of 106.5 kg. Its fuel capacity was 13 litres.

Technical specifications:

Make Model: Yamaha IT 250

Year: 1982 – 83
Engine: Two stroke, single cylinder, read valve
Capacity: 246 cc / 15.07 cu-in
Bore x Stroke: 70 x 64 mm
Cooling System: Air cooled
Compression Ratio: 9.8;1
Exhaust system: Upswept expansion chamber with USFS-approved spark arrestor and silencer
Induction: 30mm Mikunis carburetor
Ignition: CDI
Starting: Kick
Max Power: 32.2 hp @ 7500 rpm
Max Torque: 22.6 / 3.12 kg-m @ 7500 rpm
Transmission: 6 Speed
Final Drive: Chain
Gear Ratio: (1) 32/12, 2.666 (2)30/15, 2.000(3)25/16, 1.563(4)25/20, 1.250 (5)23/22, 1.045(6)21/24,0.875
Frame: Single-downtube, full-cradle chrome-moly frame with aluminum box-section swing arm
Front Suspension: Air-assisted, oil-damped fork
Front Wheel Travel: 380 mm /
Rear Suspension: Aluminum-bodied monoshock with adjustable damping and preload producing
Rear Wheel Travel: 270 mm /
Front Brakes: Drum 130 x 22mm shoes
Rear Brakes: Drum 150 x 25mm shoes
Front Tyre: 90/90 -21
Rear Tyre: 12/90 -18
Rake: 29 degrees
Trail: 125 mm / 4.9 in
Wheelbase: 1450 mm / 57.0 in
Wet Weight: 106.5 kg / 234.7 lbs
Fuel Capacity: 13 Litres / 3.4 US gal