APRILIA SR50 R Factory | BMW R 12 |
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engine specs | |
Type | |
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Liquid cooled horizontal single cylinder two 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 | |
11.5:1 | - |
Horsepower | |
- | 95/6500 KW(hp)/RPM |
Torque | |
- | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
Fuel System | |
Electronic Fuel injection | - |
transmission specs | |
Gearbox | |
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Automatic | 6-speed |
Clutch | |
Automatic centrifugal dry clutch | - |
Primary Drive | |
V-belt | - |
Final Drive | |
Gears in oil bath | Shaft |
chassis specs | |
Frame | |
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Split single cradle frame in high tensile strength steel tube | Tubular space frame in steel, engine self-supporting |
Front Suspension | |
Hydraulic fork, 90 mm wheel travel | USD telescopic forks, 45 mm |
Rear Suspension | |
Engine unit acting as swingarm frame linkages on two radial silent block mountings wheel travel 70 mm | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
Front Brake | |
190 mm disc | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
Rear Brake | |
190 mm disc | Single disc brake, 265 mm, 2-piston floating caliper |
dimension specs | |
Overall Length | |
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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 | |
32.3 in OR 820 mm | 29.7 in OR 754 mm |
Weight | |
439 lbs OR 199 kg | 500 lbs OR 227 kg |
Fuel Capacity | |
1.8 gallons OR 6.8 L | 3.7 gallons OR 14.0 L |
Wheelbase | |
50.8 in OR 1290 mm | 59.8 in OR 1519 mm |
tyres specs | |
Front | |
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130/60 x 13 | 100/90-19 |
Rear | |
130/60 x 13 | 150/80-16 |