Yamaha IT 490 (1983)

The Yamaha IT 490 is a two stroke, single cylinder, air cooled motorcycle with a capacity of 487 cc. It has a compression ratio of 4.9;1 and runs on a 38mm Mikuni carburetor with CDI ignition. The maximum power output is 35 hp at 6000 rpm and a maximum torque output of 31 lb-ft at 5500 rpm. The engine is mated to a 5-speed transmission and a chain final drive. The front suspension is 43mm telescopic adjustable forks with a wheel travel of 300mm, while the rear suspension is a mono shock with an adjustable spring preload and rebound damping and a wheel travel of 300mm. The bike also features drum brakes on both the front and rear, with a front tyre size of 3.00 -21 and a rear tyre size of 150/80 -18. Its rake is 28 degrees, trail is 125mm, wheelbase is 1435mm, seat height is 944mm, and the ground clearance is 332mm. It has a dry weight of 112.5 kg and a fuel capacity of 13.6 litres. Overall, the Yamaha IT 490 is a powerful and durable dirt bike.

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Technical specifications:

Make Model: Yamaha IT 490

Year: 1983

Engine: Two stroke, single cylinder, read valve

Capacity: 487 cc / 29.7 cu-in

Bore x Stroke: 87 x 82 mm

Cooling System: Air cooled

Compression Ratio: 4.9;1

Induction: 38mm Mikuni

Spark Plug: Champion N3c

Induction: VM38SS Mikuni carburetor

Ignition: CDI

Max Power: 35 hp @ 6000 rpm

Max Torque: 31 lb-ft @ 5500 rpm

Transmission: 5 Speed

Final Drive: Chain

Front Suspension: 43mm Telescopic adjustable forks

Front Wheel Travel: 300 mm / 11.8 in

Rear Suspension: Mono shock, adjustable spring preload and rebound damping

Rear Wheel Travel: 300 mm / 11.8 in

Front Brakes: Drum

Rear Brakes: Drum

Front Tyre: 3.00 -21

Rear Tyre: 150/80 -18

Rake: 28 degrees

Trail: 125 mm / 4.9 in

Wheelbase: 1435 mm / 56.5 in

Seat Height: 944 mm / 37.2 in

Ground Clearance: 332 mm / 13.1 in

Dry Weight: 112.5 kg / 248 lbs

Fuel Capacity: 13.6 Litres / 3.6 US gal