Comparison of GRC Moto Midimoto RR.04 and Polini XP 4T Street [S]ave
| Attribute |  Polini XP 4T Street × |  GRC Moto Midimoto RR.04 × |
|---|---|---|
| General | ||
| Production from (year) | 2007 | 2011 |
| Make | Polini | GRC Moto |
| Model | Polini XP 4T Street | GRC Moto Midimoto RR.04 |
| Category | Minibike, cross | Minibike, sport |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor. 16mm Mikuni | Carburettor. SHA 14-14 |
| Engine details | - | Polini engine |
| Displacement (cm³) | 49 | 39.7 |
| Power (kw) | - | 3.1 |
| Cooling system | - | Air |
| Transmission type,final drive | - | Chain |
| Bore (mm) | 39 | 36 |
| Stroke (mm) | 41 | 39 |
| Gearbox | 4-speed | - |
| Ignition | - | Electronic |
| Lubrication system | - | 2% mixture |
| Compression | - | 14.0:1 |
| Chassis | ||
| Front brakes | Single disc | Single disc. Floating disk |
| Rear brakes | Single disc | Single disc |
| Diameter (mm) | 150 | 120 |
| Front tyre | 3.50-10 | 90/65-6.5 |
| Rear tyre | 3.50-10 | 110/50-6.5 |
| Performance | ||
| Reserve fuel capacity (l) | 0.6 | - |
| Fuel capacity (l) | - | 1.5 |
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