| APRILIA SR 50 R Factory | BMW R 12 |
|---|
| engine specs | |
| Type | |
|---|---|
| liquid-cooled, single cylinder, 2-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 | |
| 49 cm3 | 1170 cm3 |
| Bore X Stroke | |
| 1.6x1.5 in OR 41 mm | 4.0x2.9 in OR 102 mm |
| Compression Ratio | |
| 12:1:1 | - |
| Horsepower | |
| 4/6500 KW(hp)/RPM | 95/6500 KW(hp)/RPM |
| Torque | |
| 4/0 lb-ft/RPM OR 5/0 Nm/RPM | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
| Fuel System | |
| Dell'Orto carburettor 17.5 mm | - |
| transmission specs | |
| Gearbox | |
|---|---|
| automatic CVT | 6-speed |
| Clutch | |
| Automatic centrifugal dry clutch | - |
| Primary Drive | |
| v belt | - |
| Final Drive | |
| - | Shaft |
| chassis specs | |
| Frame | |
|---|---|
| split single cradle frame in high tensile strength steel tube | Tubular space frame in steel, engine self-supporting |
| Front Suspension | |
| telescopic hydraulic fork | USD telescopic forks, 45 mm |
| Rear Suspension | |
| engine unit acting as swingarm, frame linkages on two radial silent block mountings | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
| Front Brake | |
| dual 190 mm with racing calliper with 2 opposing pistons, 32 mm | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
| Rear Brake | |
| dual 190 mm with racing calliper with 2 opposing pistons, 32 mm | Single disc brake, 265 mm, 2-piston floating caliper |
| dimension specs | |
| Overall Length | |
|---|---|
| 73.2 in OR 1859 mm | 86.6 in OR 2200 mm |
| Overall Width | |
| 27.8 in OR 706 mm | 32.7 in OR 831 mm |
| Seat Height | |
| 31.3 in OR 795 mm | 29.7 in OR 754 mm |
| Weight | |
| - | 500 lbs OR 227 kg |
| Fuel Capacity | |
| 1.8 gallons OR 6.8 L | 3.7 gallons OR 14.0 L |
| Wheelbase | |
| 49.6 in OR 1260 mm | 59.8 in OR 1519 mm |
| tyres specs | |
| Front | |
|---|---|
| 130/60 R13 | 100/90-19 |
| Rear | |
| 130/60 R13 | 150/80-16 |
