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 |
