Royal Enfield Bullet 500 (1990) vs Aprilia AF1 125 Project 108 (1987)
Comparison technical specifications
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| Make: | Royal Enfield | Aprilia |
| Model: | Bullet 500 | AF1 125 Project 108 |
| Years: | 1990 | 1987 |
| Engine: | Four Stroke, single Cylinder, OHV, 2 valve | Two stroke, single cylinder |
| Capacity: | 499 cc / 30.4 cu-in | 123 cc / 7.5 cu in |
| Bore x Stroke: | 84 x 90 mm | 54 x 54.5 mm |
| Cooling System: | Air Cooled | Liquid cooled |
| Compression Ratio: | 8.5:1 | 15.5:1 |
| Induction: | Carburettor | Dell'Orto carburetor, Ø 28 mm |
| Starting: | Kick | Electric |
| Max Power: | 27.2 hp / @ 5250 rpm | 18.7 kW / 25.1 hp @10000 rpm |
| Max Torque: | 41.3 Nm / 30.4 lb-ft @ 4000 rpm | 17.7 Nm / 1.8 kgf-m / 13.1 lb-ft @ 8000 rpm |
| Transmission: | 4 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic, Hydraulic Damping, Stroke 130 mm wheel travel | Telescopic fork, 4-way anti-drive adjustable |
| Rear Suspension: | Swing Arm With Gas Shock Absorbers, Stroke 80 mm wheel travel | Sebac mono shock |
| Front Brakes: | Drum | Single Ø 260 mm disc |
| Rear Brakes: | Drum | Single Ø 240mm disc |
| Front Tyre: | 90/90 -19 | 100/80-16 |
| Rear Tyre: | 100/90 -19 | 120/80-16 |
| Dry Weight: | 168.0 kg / 370.4 lbs | 120 kg / 265 lbs |
| Fuel Capacity: | 13.5 Litres / 3.2 US gal | 22.5 Litres / 5.9 US gal |