The GX390 features more power, quieter performance, lower fuel consumption, and lower emissions than the previous version. With new features and better performance, the new GX engines establish themselves yet again as one of the best engines in the business.
Specs
| Engine Type | Air-cooled 4-stroke OHV |
| Displacement | 389 cm3 |
| Net Power Output | 11.7 HP (8.7 kW) @ 3,600 rpm |
| Net Torque | 19.5 lb-ft (26.4 Nm) @ 2,500 rpm |
| Fuel Tank Capacity | 6.1 litres (6.4 U.S. qts) |
| Oil Capacity | 1.1 litres (1.16 U.S. qts) |
| Dry Weight | 31.5 kg (69 lbs) |
