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Introduced in September 1973, the R90S was the first production motorcycle with a factory fitted fairing. 1975 was the first year for "Daytona Orange" paint scheme.
Roland Brown
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| Year:
1977
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GENERAL
Make:
BMW
Model:
R90S
Retail New:
$3,430
Retail Current:
$3,500-$7,500
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CHASSIS
Frame:
Twin Loop Tubular
Wheelbase:
57.5 inches
Seat Height:
32 inches
Front Tire:
3.25-19
Rear Tire:
4.00-18
Front Brakes:
Dual hydraulic discs 1.38 x 10.24 inches
Rear Brakes:
7.87 x 1.18 inch drum
Front Suspension:
Telescopic fork
Rear Suspension:
Swing arm, twin shocks with adjustable preload
Instrumentation:
Speedometer with odometer, tachometer, clock, warning lights
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ENGINE
Engine Type:
Opposed twin
Engine Displacement:
898
Bore x Stroke:
90 x 70.6
Valve Train:
OHV
Valves per Cylinder:
2
Valve Adjustment:
Every 5,000 miles
Compression:
9.5:1
Carburetion:
Dual 38mm Dell'Orto
Ignition:
Battery
Starting System:
Electric, kick
Lubrication:
High Pressure Circulating Lubrication System Using an Eaton Trochoid Gear Type Pump Driven from the Camshaft
Cooling System:
Air
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WEIGHT AND FUEL ECONOMY
Dry Weight:
n/a
Wet Weight:
486 lbs
Load Capacity:
n/a
GVWR:
877 lbs
Fuel Capacity:
6.29
Average MPG:
45
Gallons to Reserve:
6.24
Range to Reserve:
280 miles
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TRANSMISSION
Clutch:
Single Dry Plate
Number of Gears:
5
Final Drive:
Shaft drive, crown wheel and pinion
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PERFORMANCE
Charging Output:
280 watts
Battery:
12V 25AH
Power:
67hp @ 7,000rpm
Torque:
55ft/lb @ 5,500rpm
Top Speed:
123mph
RPM @ 60:
4,800RPM
Standing 1/4:
13.05sec @ 103mph
0-60:
5.70 |
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