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.
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 |
