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Yamaha YB90 - generations and specs | MOTOVULKAN

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YB90

Yamaha · Model— YB90

YB90

2 generations1974 - 1980·Road

Yamaha YB90 1980

About generation H3

1980

Years: 1980+
Frame codes: H3
Class: Road

Specifications

10 groups

General

3

Market: Japanese domestic (JDM)
Model code: H3
Manufacturer: YAMAHA

Engine

16

Bore: 50 mm
Cooling: Air-cooled
Power: 7.5 hp
Fuel type: Regular (low-octane)
Power RPM: 6,500 rpm
Stroke: 45.6 mm
Cylinders: 1
Torque RPM: 5,000 rpm
Fuel system: Carburetor
Engine type: 2-stroke
Torque (kgf·m): 0.9 kgf·m
Lubrication: Separate oil injection (2T)
Cylinder layout: Single cylinder
Displacement: 89 cc
2-stroke intake: Rotary valve
Compression ratio: 6.8

Transmission

8

Type: Rotary shift
Gears: 4
Clutch: Wet multi-plate
Chain size: 428
Final drive: Chain
Gear ratios: 3.077 / 1.889 / 1.304 / 0.963
Primary reduction: 3.894
Secondary reduction: 2.642

Chassis

16

Frame: Backbone
Rear tire: 2.75-17
Front tire: 2.50-18
Rear brake: Drum (leading-trailing)
Front brake: Drum (leading-trailing)
Rear rim width: 1.4
Rear tire type: Tube type
Front rim width: 1.4
Front tire type: Tube type
Rear shocks: 2
Rear suspension: Swingarm
Front suspension: Telescopic fork
Rear ply rating: 4PR
Front ply rating: 4PR
Rear tire construction: Bias
Front tire construction: Bias

Dimensions

8

Trail: 78 mm
Width: 720 mm
Height: 1,030 mm
Length: 1,895 mm
Rake: 26.5 °
Wheelbase: 1,190 mm
Seat height: 775 mm
Ground clearance: 135 mm

Weight

1

Dry weight: 87 kg

Capacities

2

Fuel tank: 8.6 l
2T oil tank: 1.4 l

Electrical

7

Battery: 6N4-2A
Starter: Kick starter
Ignition: CDI
Spark plug: BP6HS
Spark plugs: 1
Battery capacity: 6V-4Ah
Headlight rating (high): 25W/25W

Instruments

1

Speedometer: Analog

Performance

2

Rear tire pressure: 2.25 kgf/cm²
Front tire pressure: 1.5 kgf/cm²

Current model lots at auction