The Yamaha IT motorcycle specifications include a 397 cc (24.22 cu in) engine, power of 36.7 hp (26.8 kW) @ 6,500 rpm, a 6-speed gearbox, and a listed weight of 113.4 kg (250 lb).
Key specifications
How the Yamaha IT compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 31% lower than the Yamaha database average. Around the 47th percentile across Yamaha models.
About 28% lower than the Yamaha database average. Around the 46th percentile across Yamaha models.
About 8% smaller than the Yamaha database average. Around the 45th percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
36.7 hp — more powerful than about 47% of Yamaha models with power data.
397 cc — larger displacement than about 46% of Yamaha models.
12 L — larger than about 45% of Yamaha fuel tanks in this database.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
2,210
2,082
6% above average.
935
823
14% above average.
1,170
1,172
Close to average.
1,420
1,416
Close to average.
275
181
52% above average.
Mechanical overview
Additional useful specifications
| Front tire size | 3.00-21 |
|---|---|
| Rear tire size | 5.10-18 |
| Power-to-weight ratio | 0.324 hp/kg |
| Power-to-weight | 323.6 hp/tonne |
| Specific power | 92.4 hp/L |
| Bore/stroke ratio | 1.33:1 (Oversquare) |
Model information
| Year released | 1979 |
|---|
Engine specifications
| Engine type | Single cylinder, two-stroke |
|---|---|
| Displacement | 397 cc (24.22 cu in) |
| Power | 36.7 hp (26.8 kW) @ 6,500 rpm |
| Torque | 40.2 Nm (4.1 kgf-m or 29.7 ft.lbs) |
| Bore × stroke | 85.0 x 64 mm (3.3 x 2.5 inches) |
| Compression ratio | 7.9:1 |
| Cooling system | Air |
| Fuel system | Carburettor. Mikuni, 26mm |
| Fuel control | Port control |
| Ignition | Magneto type |
| Starter | Kick |
| Lubrication | Pre mix |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
| Clutch | Wet multiple disc |
Chassis and suspension
| Frame | Tubular steel double cradle |
|---|---|
| Front suspension | Telescopic fork |
| Rear suspension | Monoshock, nitrogen canister |
| Front wheel travel | 230 mm (9.1 inches) |
| Rear wheel travel | 205 mm (8.1 inches) |
Brakes, wheels and tires
| Front brakes | Expanding brake (drum brake) |
|---|---|
| Rear brakes | Expanding brake (drum brake) |
| Front tire | 3.00-21 |
| Rear tire | 5.10-18 |
Dimensions and weight
| Dry weight | 113.4 kg (250 lb) |
|---|---|
| Overall length | 2,210 mm (87.0 inches) |
| Overall width | 935 mm (36.8 inches) |
| Overall height | 1,170 mm (46.1 inches) |
| Wheelbase | 1,420 mm (55.9 inches) |
| Ground clearance | 275 mm (10.8 inches) |
Fuel and emissions
| Fuel capacity | 12.00 L (3.17 US gal) |
|---|
Performance
| Top speed | 136.8 km/h (85.0 mph) |
|---|---|
| Power/weight ratio | 0.3237 hp/kg |
Other specifications
| Exhaust system | Upswept expansion chamber with USFS-approved spark arrestor and silencer |
|---|
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.