Ariel Leader 4 Prototype (1962) vs BMS Choppers Road Star (2004) vs BMS Choppers Roadliner S (2013)
Comparison technical specifications
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| Make: | Ariel | BMS Choppers | BMS Choppers |
| Model: | Leader 4 Prototype | Road Star | Roadliner S |
| Years: | 1962 | 2004 | 2013 |
| Engine: | Four stroke, four horisontal cylinders on the left with in-line crankshaft, OHV | Four stroke, 48° V-twin | Four-stroke, pushrod OHV, air-cooled, 48° V-twin, 4 valves per cylinder |
| Capacity: | 696 cc / 42.5 cu in | 1671 cc / 102 cu in | 1852 cc / 113 cu in |
| Cooling System: | Air cooled | Air cooled | Air cooled |
| Lubrication: | Wet sump | Dry sump | Dry sump |
| Exhaust: | 4-into-1 | Two-into-two, chrome | 2-into-2, stainless steel |
| Induction: | Single Zenith carburetor | Ø40 mm Mikuni CV carburetor with throttle position sensor | Twin-bore electronic fuel injection, with throttle position sensor |
| Ignition: | Coil | Digital TCI | TCI |
| Starting: | Electric | Electric | Electric |
| Transmission: | 4-Speed | 5-Speed, wide ratio | 5-Speed |
| Final Drive: | Shaft | Belt | Belt |
| Frame: | Pressed steel frame with leg shields | Double tube cradle, single sided swingarm | Lightweight aluminium |
| Wheels: | Steel, laced wire spokes | 3-Spoke, aluminium, chrome | 3-Spoke, cast aluminium |
| Front Brakes: | Drum | Dual Ø298 mm discs, 4 piston calipers | Dual Ø298 mm discs, 4-piston caliper |
| Rear Brakes: | Drum | Single Ø320 mm disc, 2 piston caliper | Single Ø320 mm disc, single piston caliper |
| Wheelbase: | 1448 mm / 57 in | 1689 mm / 66.5 in | 1715 mm / 67.5 in |