| BSA M20 | ARCH MOTORCYCLE 1S |
|---|
| engine specs | |
| Type | |
|---|---|
| air-cooled, four-stroke, single cylinder, side valve | S&S Cycle T124 45-degree downdraft fuel-injected V-Twin engine |
| Displacement | |
| 496 cm3 | 2032 cm3 |
| Bore X Stroke | |
| 3.2x3.7 in OR 81 mm | - |
| Compression Ratio | |
| 4.9:1 | - |
| Horsepower | |
| 13/4200 KW(hp)/RPM | - |
| Torque | |
| - | 115.3/- lb-ft/RPM OR 156/- Nm/RPM |
| Fuel System | |
| Amal carburetor | EFI |
| transmission specs | |
| Gearbox | |
|---|---|
| 4-speed, manual | 6-speed |
| Clutch | |
| dry, multi-plate | Compact dry clutch |
| Final Drive | |
| chain | Chain |
| chassis specs | |
| Frame | |
|---|---|
| steel | Tubular steel frame with CNC-machined aluminum subframe single-sided swingarm |
| Front Suspension | |
| parallelogram fork | Fully adjustable ARCH/Öhlins FGRT series fork |
| Rear Suspension | |
| hard-tail, sprung seat | Fully adjustable ARCH/Öhlins rear shock with reservoir and hydraulic pre-load adjustment |
| Front Brake | |
| drum | Dual ISR 6-piston monobloc radial mount calipers with ISR floating dampened discs |
| Rear Brake | |
| drum | Single ISR 4-piston monobloc radial mount caliper with ISR semi-floating disc |
| dimension specs | |
| Overall Length | |
|---|---|
| 85.8 in OR 2179 mm | - |
| Overall Width | |
| 29.1 in OR 739 mm | - |
| Seat Height | |
| 28.5 in OR 724 mm | 31.5 in OR 800 mm |
| Ground Clearance | |
| 4.7 in OR 119 mm | - |
| Weight | |
| 368 lbs OR 167 kg | 563 lbs OR 255 kg |
| Fuel Capacity | |
| 3.7 gallons OR 14.0 L | 4.5 gallons OR 17.0 L |
| Wheelbase | |
| 54 in OR 1372 mm | 65.4 in OR 1661 mm |
| tyres specs | |
| Front | |
|---|---|
| 3.25 x 19 | 120/70-17 Michelin Power RS |
| Rear | |
| 3.50 x 19 | 240/45-17 Michelin Power RS |
