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Yamaha RD90 - generations and specs | MOTOVULKAN
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RD90
Yamaha · Model
— RD90
RD90
2 generations
1974 - 1979
·
Off-road
FRAME · —
1974 - 1979
89cc · 10 hp · 1974-1979
FRAME · 464
1977+
89cc · 10 hp · 1977
Yamaha RD90 1977
About generation 464
1977
Years
1977+
Frame codes
464
Class
Off-road
Specifications
10 groups
General
3
Market
Japanese domestic (JDM)
Model code
464
Manufacturer
YAMAHA
Engine
17
Bore
50 mm
Cooling
Air-cooled
Power
10 hp
Fuel type
Regular (low-octane)
Power RPM
8,000 rpm
Stroke
45.6 mm
Cylinders
1
Torque RPM
7,000 rpm
Engine code
464
Fuel system
Carburetor
Engine type
2-stroke
Torque (kgf·m)
0.96 kgf·m
Lubrication
Separate oil injection (2T)
Cylinder layout
Single cylinder
Displacement
89 cc
Fuel system model
VM20SH
Compression ratio
6.9
Transmission
10
Type
Return shift
Gears
5
Clutch
Wet multi-plate
Shift type
Foot shift
Final drive
Chain
Gear ratios
2.833 / 1.875 / 1.368 / 1.091 / 0.917
Rear sprocket
38
Front sprocket
14
Primary reduction
3.895
Secondary reduction
2.714
Chassis
16
Frame
Double cradle
Rear tire
2.75-18
Front tire
2.50-18
Rear brake
Drum (leading-trailing)
Front brake
Hydraulic disc
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
9
Trail
86 mm
Width
735 mm
Height
1,045 mm
Length
1,875 mm
Rake
27 °
Wheelbase
1,240 mm
Seat height
770 mm
Ground clearance
150 mm
Turning radius
2 m
Weight
2
Dry weight
91 kg
Seats
2
Capacities
2
Fuel tank
10 l
2T oil tank
1.3 l
Electrical
7
Battery
6N4-2A-2
Starter
Kick starter
Spark plug
BP7HS
Spark plugs
1
Battery capacity
6V 4Ah
Taillight rating
17W/5.3W
Headlight rating (high)
25W/25W
Instruments
2
Tachometer
Yes
Speedometer
Analog
Performance
5
Range
580 km
Rear tire pressure
2 kgf/cm²
Front tire pressure
1.5 kgf/cm²
Measure standard
At 50 km/h
Fuel economy
1.7 L/100km
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