Honda RA300E/RA302E engine
              < Honda RA300E 
 
            
          | Honda RA300E Honda RA302E  | |
|---|---|
| Overview | |
| Manufacturer | Honda | 
| Production | 1965-1966 | 
| Layout | |
| Configuration | Inline-4 | 
| Displacement | 993–996 cc (60.6–60.8 cu in) | 
| Cylinder bore | 72–78 mm (2.8–3.1 in) | 
| Piston stroke | 52–61.2 mm (2.0–2.4 in) | 
| Valvetrain | 4-valve valves per cylinder, double overhead camshaft (DOHC) | 
| Combustion | |
| Fuel system | Fuel injection | 
| Fuel type | Gasoline | 
| Cooling system | Water-cooled | 
| Output | |
| Power output | 135–150 hp (101–112 kW) | 
| Dimensions | |
| Dry weight | 145 kg (320 lb) | 
The Honda RA300E and Honda RA302E are 1 litre (61 cu in) four-stroke, four-cylinder, naturally-aspirated, racing engines, designed, developed and built by Honda, for Formula Two racing, in 1965.