Comparison of Lem Four X and Xmotos XB-21 [S]ave
| Attribute |  Lem Four X × |  Xmotos XB-21 × |
|---|---|---|
| General | ||
| Production from (year) | 2006 | 2008 |
| Make | Lem | Xmotos |
| Model | Lem Four X | Xmotos XB-21 |
| Category | Minibike, cross | Minibike, cross |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Valves per cylinder | 2 | - |
| Displacement (cm³) | 107 | 50 |
| Power (kw) | 5.1 | 2.5 |
| Cooling system | Air | Air |
| Transmission type,final drive | - | Chain |
| Bore (mm) | 52.4 | 39 |
| Stroke (mm) | 49.5 | 41.4 |
| Gearbox | 4-speed | Automatic |
| Ignition | CDI | - |
| Compression | - | 9.4:1 |
| Chassis | ||
| Front suspension | - | Inverted hydraulic Adjustable shock |
| Rear suspension | - | Adjustable Air /Oil shock Absorber |
| Front brakes | Single disc | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Diameter (mm) | 80 | - |
| Front tyre | 2.50-12 | - |
| Rear tyre | 2.75-10 | - |
| Other | ||
| Color options | - |
|
| Dimensions | ||
| Wheelbase (mm) | 1,010 | 950 |
| Dry weight (kg) | 61 | 50 |
| Power/weight ratio | 0.0836 | 0.05 |
| Overall length (mm) | 1,415 | 1,320 |
| Seat height (mm) | 670 | 650 |
| Ground clearance (mm) | 215 | 150 |
| Performance | ||
| Fuel capacity (l) | - | 3 |
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