IT

Bore x stroke

85.0 x 64.0 mm (3.3 x 2.5 inches)

Clutch

Wet multiple disc

Compression

7.9:1

Cooling system

Air

Diameter

130 mm (5.1 inches)

Dry weight

113.4 kg (250.0 pounds)

Engine size

397.0 ccm (24.22 cubic inches)

Exhaust system

Upswept expansion chamber with USFS-approved spark arrestor and silencer

Frame type

Tubular steel double cradle

Front brakes

Expanding brake (drum brake)

Front suspension

Telescopic fork

Front tire

3.00-21

Front wheel travel

230 mm (9.1 inches)

Fuel capacity

12.00 litres (3.17 US gallons)

Fuel control

Port control

Fuel system

Carburettor. Mikuni, 26mm

Gearbox

6-speed

Ground clearance

275 mm (10.8 inches)

Ignition

Magneto type

Lubrication system

Pre mix

Model name

Yamaha IT

Output

36.7 HP (26.8 kW)) @ 6500 RPM

Overall height

1170 mm (46.1 inches)

Overall length

2210 mm (87.0 inches)

Overall width

935 mm (36.8 inches)

Power/weight ratio

0.3237 HP/kg

Rear brakes

Expanding brake (drum brake)

Rear suspension

Monoshock, nitrogen canister

Rear tire

5.10-18

Rear wheel travel

205 mm (8.1 inches)

Starter

Kick

Top speed

136.8 km/h (85.0 mph)

Torque

40.2 Nm (4.1 kgf-m or 29.7 ft.lbs)

Transmission type

Chain (final drive)

Type

Enduro / offroad

Type of engine

Single cylinder, two-stroke

Wheelbase

1420 mm (55.9 inches)

Year of manufacture

1979