Yamaha IT 250 (1980-81)

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.

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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