R90S Specifications

Tire, front 3.25 in x 19 in. Metzeler
Tire, rear 4.00 in x 18 in Metzeler
Brake, front Dual hydraulic disc 1 35 in.x 10.24 in.
Brake, rear Drum, 7.87 in x 1.18 in.
Engine type OHV opposed twin
Bore and stroke 3.54 in. x 2.78 in., 90mm x 70.6mm
Piston displacement 54.78 cu in , 898cc
Compression ratio 9.5:1
Carburetion 2; 38mm; Dell'Orto PHM with accelerator pumps
Air filtration Dry paper
Fuel capacity 6.4 gallons
Oil capacity 4.2 pts. (with filter 4.75 pts.)
Electrical power 12V, 280 watt alternator
Battery 12V 25 AH
Gear Ratios, overall (1)13.2 (2)8.58 (3)8.21 (4)5.01 (5)4.5
Secondary transmission Drive shaft, 3.01 ring-gear with pinion
Wheelbase 57.5 inches
Seat height 30.5 inches
Curb weight 498 lbs. with full tank of gas
Standing start 1/4-mile 13.07 seconds 102 mph
Top speed 124 mph

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