BMW R 65 Monolever (1984) vs Aprilia SX 50 (2013)
Comparison technical specifications
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| Make: | BMW | Aprilia |
| Model: | R 65 Monolever | SX 50 |
| Years: | 1984 | 2013 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Single cylinder, two stroke |
| Capacity: | 649.6 cc / 39.6 cu in. | 49.9 cc / 3.04 cu in |
| Bore x Stroke: | 82 x 61.5 mm | 39.9 x 40 mm |
| Compression Ratio: | 8.4:1 | 11.5:1 |
| Cooling System: | Air cooled | Liquid cooled |
| Induction: | 2 x Bing constant depression carburetors | Dell'Orto PVHA 17.5 carburetor |
| Ignition: | Bosch contact free electronic ignition | Electronic CDI |
| Starting: | Electric | Kick |
| Transmission: | 5 Speed | 6 speed |
| Final Drive: | Shaft | Chain |
| Front Suspension: | Telescopic hydraulic forks | Hydraulic fork, Ø 40 mm |
| Front Wheel Travel: | 175 mm / 6.9" | 195 mm / 7.7 in |
| Rear Suspension: | Monolever swinging arm | High strength steel swingarm, hydraulic monoshock |
| Rear Wheel Travel: | 120 mm / 4.7" | 180 mm / 7.1 in |
| Front Brakes: | 2x ∅260mm discs, 2 piston calipers | Single stainless steel disc, Ø 260 mm, floating caliper |
| Rear Brakes: | Single ∅200mm drum | Single disc, Ø 180 mm, floating caliper |
| Front Tyre: | 90/90 - 18 | 100/80 ZR17 |
| Rear Tyre: | 120/90 - 18 | 130/70 ZR17 |
| Fuel Capacity: | 22 liters / 5.8 US gal | 7 L / 1.85 US gal |