| YAMAHA YZ125 | ARCH MOTORCYCLE 1S |
|---|
| engine specs | |
| Type | |
|---|---|
| liquid-cooled, 2-stroke, reed-valve inducted | S&S Cycle T124 45-degree downdraft fuel-injected V-Twin engine |
| Displacement | |
| 124 cm3 | 2032 cm3 |
| Bore X Stroke | |
| 2.1x2.1 in OR 53 mm | - |
| Compression Ratio | |
| 8.6 – 10.7:1 | - |
| Torque | |
| 18/10000 lb-ft/RPM OR 24/10000 Nm/RPM | 115.3/- lb-ft/RPM OR 156/- Nm/RPM |
| Fuel System | |
| 38mm Mikuni TMX carburetor | EFI |
| transmission specs | |
| Gearbox | |
|---|---|
| 6-speed, manual | 6-speed |
| Clutch | |
| Wet multi-disc, manual | Compact dry clutch |
| Final Drive | |
| O-ring chain | Chain |
| chassis specs | |
| Frame | |
|---|---|
| Aluminium | Tubular steel frame with CNC-machined aluminum subframe single-sided swingarm |
| Front Suspension | |
| Adjustable 48 mm inverted fork 300 mm (11.8 in.) travel | Fully adjustable ARCH/Öhlins FGRT series fork |
| Rear Suspension | |
| Fully adjustable link Monocross 315 mm (12.4 in.) travel | Fully adjustable ARCH/Öhlins rear shock with reservoir and hydraulic pre-load adjustment |
| Front Brake | |
| 250mm floating disc | Dual ISR 6-piston monobloc radial mount calipers with ISR floating dampened discs |
| Rear Brake | |
| 245mm disc | Single ISR 4-piston monobloc radial mount caliper with ISR semi-floating disc |
| dimension specs | |
| Overall Length | |
|---|---|
| 84.2 in OR 2139 mm | - |
| Overall Width | |
| 32.6 in OR 828 mm | - |
| Seat Height | |
| 39.3 in OR 998 mm | 31.5 in OR 800 mm |
| Ground Clearance | |
| 15.3 in OR 389 mm | - |
| Weight | |
| 190 lbs OR 86 kg | 563 lbs OR 255 kg |
| Fuel Capacity | |
| 2.1 gallons OR 7.9 L | 4.5 gallons OR 17.0 L |
| Wheelbase | |
| 56.8 in OR 1443 mm | 65.4 in OR 1661 mm |
| tyres specs | |
| Front | |
|---|---|
| 80/100-21 | 120/70-17 Michelin Power RS |
| Rear | |
| 100/90-19 | 240/45-17 Michelin Power RS |
