The Yamaha IT 250 motorcycle was produced in 1980-81 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 USFS-approved spark arrestor and silencer for its exhaust system, and a 30mm Mikunis carburetor for induction. The bike had CDI ignition and could be started by a kick. It had a maximum power of 32.2 hp at 7500 rpm and a maximum torque of 22.6 / 3.12 kg-m at 7500 rpm. The transmission was six speed with a final drive of chain gear ratio. The frame was single-downtube, full-cradle chrome-moly with an aluminum box-section swing arm. The front suspension was air-assisted, oil-damped fork and the rear suspension was an aluminum-bodied monoshock with adjustable damping and preload. The bike had a front brake of drum 130 x 22mm shoes and a rear brake of drum 150 x 25mm shoes. It had a 90/90-21 front tire and a 12/90-18 rear tire, with a rake of 29 degrees and a trail of 125 mm/4.9 in. The wet weight of the bike was 106.5 kg/234.7 lbs, and it had a fuel capacity of 13 liters/3.4 US gal.
Technical specifications:
Make Model: Yamaha IT 250
| Year | 1980 – 81 |
|---|---|
| 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 |
