Yamaha IT490
| Manufacturer | Yamaha |
|---|---|
| Production | 83-84 |
| Engine | 490 |
| Sparkplug | B8EV '83-84 |
| Front Tire | 3.00-21 '83-84 |
| Rear Tire | 150/80-18 '83-84 |
| Manuals | Service Manual |
| Tech Specs · Brochures · Reviews · Ads · Videos | |
The Yamaha IT490 is a motorcycle produced by Yamaha from 1983 to 1984.
1983
See Also
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| Manufacturer | Yamaha |
|---|---|
| Also called | IT 490 |
| Production | 1983 - 1984 |
| Class | Enduro |
| Engine | Two stroke, single cylinder, read valve, air cooled |
| Bore / Stroke | 86.4mm x 86.4mm |
| Compression ratio | 4.9:1 |
| Horse Power | 35.0 HP (26.1 KW) @ 6000RPM |
| Torque | 30.98 ft/lbs (42.0 Nm) @ 5500RPM |
| Ignition type | cdi |
| Battery | 4.9:1 |
| Transmission | Gear box: 5-Speed Final Drive: Chain |
| Suspension | Front: 43mm Telescopic adjustable forks Rear: Mono shock, adjustable spring preload and rebound damping |
| Brakes | Front: Drum Rear: Drum |
| Front Tire | 3.00 -21 |
| Rear Tire | 150/80 -18 |
| Wheelbase | 56.5 inches (1435 mm) |
| Seat height | 37.2 inches (945 mm) |
| Weight | 275.58 pounds (125.0 Kg) (dry), 123.0 kg (wet) |
| Fuel capacity | 3.59 Gallon (13.60 Liters) |
| Manuals | Service Manual |
| Tech Specs · Brochures · Reviews · Ads · Videos | |
The Yamaha IT 490 was a Two stroke, single cylinder, read valve, air cooled Enduro motorcycle produced by Yamaha between 1983 and 1984. Max torque was 30.98 ft/lbs (42.0 Nm) @ 5500 RPM. Claimed horsepower was 35.0 HP (26.1 KW) @ 6000 RPM.
Engine
The engine was a air cooled Two stroke, single cylinder, read valve, air cooled. A 86.4mm bore x 86.4mm stroke result in a displacement of just 490.0 cubic centimeters.
Drive
The bike has a 5-Speed transmission. Power was moderated via the Wet multi-discs.
Chassis
It came with a 3.00 -21 front tire and a 150/80 -18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a 43mm Telescopic adjustable forks while the rear was equipped with a Mono shock, adjustable spring preload and rebound damping. The IT 490 was fitted with a 3.59 Gallon (13.60 Liters) fuel tank. The bike weighed just 275.58 pounds (125.0 Kg). The wheelbase was 56.5 inches (1435 mm) long.
1984 Yamaha IT 490
The big news in the powerplant is the bump in displacement from 465 to 487cc, accomplished simply by increasing the cylinder bore two millimeters. This follows the large, seven-millimeter increase in stroke which boosted the IT's displacement from 425 to 465cc in 1981. Aside from the trendiness involved in increasing their open-classers' engine sizes, most manufacturers are nudging 500cc because more displacement is the most straightforward route to better power.