BMW Roctane | BMW R 12 |
---|
engine specs | |
Type | |
---|---|
Air/water-cooled 2-cylinder 4-stroke | Water-cooled, 2-cylinder, four-stroke boxer engine with four valves per cylinder operated by cam followers and two overhead camshafts per cylinder |
Displacement | |
1802 cm3 | 1170 cm3 |
Bore X Stroke | |
4.2x3.9 in OR 107 mm | 4.0x2.9 in OR 102 mm |
Compression Ratio | |
9.6:1 | - |
Horsepower | |
91/4750 KW(hp)/RPM | 95/6500 KW(hp)/RPM |
Torque | |
117/3000 lb-ft/RPM OR 159/3000 Nm/RPM | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
Fuel System | |
Electronic Fuel Injection | - |
transmission specs | |
Gearbox | |
---|---|
6-Speed Constant mesh | 6-speed |
Clutch | |
Hydraulically activated single-plate dry clutch | - |
Final Drive | |
Chain | Shaft |
chassis specs | |
Frame | |
---|---|
Steel double-loop tube frame | Tubular space frame in steel, engine self-supporting |
Front Suspension | |
Telescopic forks, fixed fork | USD telescopic forks, 45 mm |
Rear Suspension | |
Cantilever | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
Front Brake | |
Double discs 300 mm | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
Rear Brake | |
Single disc 300 mm | Single disc brake, 265 mm, 2-piston floating caliper |
dimension specs | |
Overall Length | |
---|---|
103 in OR 2616 mm | 86.6 in OR 2200 mm |
Overall Width | |
37.5 in OR 953 mm | 32.7 in OR 831 mm |
Seat Height | |
28.3 in OR 719 mm | 29.7 in OR 754 mm |
Weight | |
1235 lbs OR 560 kg | 500 lbs OR 227 kg |
Fuel Capacity | |
4.2 gallons OR 15.9 L | 3.7 gallons OR 14.0 L |
Wheelbase | |
67.7 in OR 1720 mm | 59.8 in OR 1519 mm |
tyres specs | |
Front | |
---|---|
120/70 B 21 | 100/90-19 |
Rear | |
180/55 B 18 | 150/80-16 |