BMW R 80RT Mono (1984-85) vs BMW G 450X (2008) vs BMW K100 LT (1987-88)
Comparison technical specifications
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| Make: | BMW | BMW | BMW |
| Model: | R 80RT Mono | G 450X | K100 LT |
| Years: | 1984-85 | 2008 | 1987-88 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, single cylinder, DOHC, 4 valve | Four stroke, horizontal in line four cylinder, DOHC, 2 valves per cylinder |
| Capacity: | 797.5 cc / 48.7 cu in. | 449 cc / 27.4 cub. in. | 987 cc / 60.2 cub. in |
| Bore x Stroke: | 84.8 x 70.6 mm | 98 x 59 mm | 67 x 70 mm |
| Compression Ratio: | 8.2:1 | 12.0 :1 | 10.2:1 |
| Induction: | 2 x Bing constant depression carburetors | Electronic fuel injection | Electronic injection, Bosch LE-Jetronic |
| Starting: | Electric | Electric | Electric |
| Max Power: | 36.4 kW / 50 hp @ 6500 rpm | 30.7 kW / 41 hp @ 7000 rpm | 65.6 kW / 90 hp @ 8000 rpm |
| Max Torque: | 59 Nm / 6.0 kgf-m / 43 ft lb @ 3500 rpm | 43 Nm / 4.4 kgf-m / 32 lb-ft @ 6500 rpm | 86 Nm / 8.8 kgf-m / 63 ft-lb @ 6000 rpm |
| Clutch: | Dry single plate, with diaphragm spring | Multiple plate in oil bath | Dry, single plate, cable operated |
| Transmission: | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Shaft | Chain | Shaft |
| Gear Ratio: | 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50 | 1st 2.46 / 2nd 1.71 / 3rd 1.35 / 4th 1.04 / 5th 0.88:1 | 1st 4.50 / 2nd 2.96 / 3rd 2.30 / 4th 1.88 / 5th 1.61:1 |
| Front Suspension: | Telescopic hydraulic forks. | 45mm Upside-down forks | Telescopic fork with hydraulic shock absorber |
| Front Wheel Travel: | 200 mm / 7.3 in | 300 mm / 11.8 in | 185 mm / 7.3 in |
| Rear Suspension: | Long swinging arm with adjustable strut. | Direct Mounted Öhlins Shock | Monolever swinging arm |
| Rear Wheel Travel: | 125 / 4.9 in | 320 mm / 12.6 in | 110 mm / 4.3 in. |
| Front Brakes: | 2 x ∅260mm discs, 1 piston caliper | Single 260mm disc, 2 piston floating caliper | 2 x ∅285 mm discs, 2 piston calipers |
| Rear Brakes: | Single ∅200mm drum | Single 220mm disc, 1 piston floating caliper | Single ∅285 mm disc, 1 piston caliper |
| Front Tyre: | 3.25 - H19 | 90/90-21 | 100/90-18 |
| Rear Tyre: | 4.00 - H18 | 140/80-18 | 130/90-17 |
| Dimensions: | Length 2210 mm / 87.0 in Width 746 mm / 29.3 in Height 1465 mm / 57.6 in | Length 2200 mm / 86.6 in Width 806 mm / 31.7 in (inc. mirrors) Height 1475 mm / 57.1 in (not inc. mirrors) | Length 2220 mm / 87.4 in Width 960 mm / 37.8 in Height 1155 mm / 45.5 in |
| Wheelbase: | 1465 mm / 57.67 in | 1475 mm / 58.1 in | 1516 m /59.7 in. |
| Seat Height: | 810 mm / 31.9 in | 911 mm / 35.9 in | 810 mm / 31.90 in. |
| Wet Weight: | 235 kg / 417 lbs | 121 kg / 267 lbs | 253 kg / 558 lbs |
| Fuel Capacity: | 24 Litres / 6.3 gal | 8 Litres / 2.1 US gal | 22 Liters / 5.8 US gal |