| TECHNICAL SPECIFICATION |
|---|
| Model ID |
|---|
| Manufacturer (Make) | Polini |
| Model Name | 910 GP4 Air Junior |
| Year | 2007 |
| Category(class) | Pocket bike / Minibike (Sport) |
| Engine |
|---|
| Engine Capacity (Displacement) | 39 ccm (2.38 cubic inches) |
| Engine Type | Single cylinder |
| Bore x Stroke | Ø36.0 mm x 39.0 mm (Ø1.42 inches x 1.54 inches) |
| Bore/Stroke Ratio | 0.92 |
| Compression Ratio | 14.0:1 |
| Stroke | 2 |
| Fuel System(Carburetion) | Carburettor. SHA 14-14 |
| Ignition | Electronic with inductive discharge |
| Starter System | Kick |
| Cooling System | Air |
| Powertrain |
|---|
| Clutch | Dry with centrifuge counter weights |
| Transmission (Final Drive) | Chain |
| Chassis/Suspension/Brakes |
|---|
| Frame Type | Latticed tubular frame |
| Front Brakes | Single disc |
| Front Brakes Diameter | Ø148 mm (Ø5.83 inches) |
| Rear Brakes | Single disc. 130 |
| Front Tire | 90/65-R6.5 |
| Rear Tire | 90/65-R6.5 |
| Dimensions |
|---|
| Overall Length | 940 mm (37.01 inches) |
| Overall Width | 240 mm (9.45 inches) |
| Seat Height | 395 mm (15.55 inches) |
| Dry Weight | 20.5 kg (45 lb) |
| Performance |
|---|
| Max Power | 4.20 HP (3.1 kW) |
| Power/Weight Ratio | 0.18 Hp/Kg |
| Top Speed | - |
| Acceleration (dart, speedup) time | |
| 0-100 km/h | - |
| 0-60 mph | - |
| 1/4 mile | - |
| 60 to 140 km/h, highest gear | - |
