| ATK 250 | ARCH MOTORCYCLE 1S |
|---|
| engine specs | |
| Type | |
|---|---|
| liquid-cooled, two-stroke, Rotax single cylinder | S&S Cycle T124 45-degree downdraft fuel-injected V-Twin engine |
| Displacement | |
| 249 cm3 | 2032 cm3 |
| Bore X Stroke | |
| 2.7x2.8 in OR 69 mm | - |
| Compression Ratio | |
| 7:1 | - |
| Torque | |
| - | 115.3/- lb-ft/RPM OR 156/- Nm/RPM |
| Fuel System | |
| 38mm Mikuni TMS carburetor | EFI |
| transmission specs | |
| Gearbox | |
|---|---|
| 6-speed, manual | 6-speed |
| Clutch | |
| wet multi-disc, manual | Compact dry clutch |
| Final Drive | |
| chain | Chain |
| chassis specs | |
| Frame | |
|---|---|
| steel | Tubular steel frame with CNC-machined aluminum subframe single-sided swingarm |
| Front Suspension | |
| 46mm Paioli telescopic fork | Fully adjustable ARCH/Öhlins FGRT series fork |
| Rear Suspension | |
| Ohlins adjustable monoshock | Fully adjustable ARCH/Öhlins rear shock with reservoir and hydraulic pre-load adjustment |
| Front Brake | |
| single 260mm disc, 2-piston caliper | Dual ISR 6-piston monobloc radial mount calipers with ISR floating dampened discs |
| Rear Brake | |
| single 220mm disc, 1-piston caliper | Single ISR 4-piston monobloc radial mount caliper with ISR semi-floating disc |
| dimension specs | |
| Seat Height | |
|---|---|
| 37.2 in OR 945 mm | 31.5 in OR 800 mm |
| Weight | |
| 236 lbs OR 107 kg | 563 lbs OR 255 kg |
| Fuel Capacity | |
| 3.7 gallons OR 14.0 L | 4.5 gallons OR 17.0 L |
| Wheelbase | |
| 58.5 in OR 1486 mm | 65.4 in OR 1661 mm |
| tyres specs | |
| Front | |
|---|---|
| 80/100-21 | 120/70-17 Michelin Power RS |
| Rear | |
| 100/100-18 | 240/45-17 Michelin Power RS |
