Motor Type
Four-stroke two cylinder horizontally opposed "Boxer" engine, air cooled
Bore x Stroke
84.8 x 70.6 mm (3.33 x 2.77 in)
Displacement
797.5 cc
Max Power
55 hp (40 KW) at 7,000 rpm or 50 hp (37 Kw) at 7,250 rpm
Max Torque
64 Nm / 47 ft lb at 5,500 rpm or 58 Nm / 42 ft lb at 5,500 rpm
Compression Ratio
9.2 : 1 or 8.2 : 1
Valves Per Cylinder
2
Valve Control
OHV, using push rod and rocker arm
Carburation System
2 constant depression carburettors, Bing 64/32/201 - 64/32/202
Engine Lubricating System
Wet sump
Power Transmission
Clutch
Dry single plate, with diaphragm spring
Number of Gears
5
Gear Selection
Dog type gearbox (ratchet foot lever)
Gearbox Ratios
4.4 / 2.86 / 2.07 / 1.67 / 1.50 (optional sport version: 3.38 / 2.43 / 1.93 / 1.67 / 1.50
Rear Wheel Ratio
1: 3.20 or 1 : 3.36
Bevel/Crownwheel
10 / 32 or 11 / 37 teeth
Electrical System
Ignition System
Battery ignition. From 1981 model: Contact free electronic ignition
Alternator
Bosch 12 V/280 W
Starter
Bosch 0.7 Kw
Spark Plugs
Bosch W 175 T 30 / Beru 175/14/3 A / Champion N10Y
Chassis
Type of Frame
Double loop tubular frame with bolt on rear section
Front wheel suspension
Telescopic fork with hydraulic shock absorber
Rear wheel suspension
Long swinging arm with adjustable strut
Spring Travel Front/Rear
200 / 125 mm (7.87 x 4.92 in)
Wheel Rims, Front
1.85 B 19
Wheel Rims, Rear
2.50 B 18
Tyres, Front
3.25 H 19
Tyres, Rear
4.00 H 18
Brakes, Front
Dual disc brake 260 mm / 10.23 in diameter. ATE 1 piston caliper
Brakes, Rear
Simplex drum brake 200 mm / 7.87 in diameter
