Engine specification
| engine name |
Hi-Rapier NO-GA |
| base engine | Honda C50-E |
| engine type | gasoline-4cycle |
| cylinder | 1 |
| cylinder stroke-bore ratio | 39.0*41.4 |
| engine capacity | 49.46cc |
| compression ratio | |
| style of combustion chamber | hemispherical combustion chamber |
| combustion chamber volume | |
| valve layout | SOHC,chain |
| number of valves | IN 1,EX 1 |
| valve spring | IN 1,EX 1 |
| valve clearance | IN 0.08mm,EX 0.05mm |
| valve lift quantity | IN 3mm,EX 3mm |
| valve timing I.O. | 18°BTDC(0.1mm lift) |
| I.C. | 60°ABDC(0.1mm lift) |
| E.O. | 52°BBDC(0.1mm lift) |
| E.C. | 18°ATDC(0.1mm lift) |
| start system | self starter motor |
| ignition system | CDI |
| ignition timing | 10°BTDC（advance） |
| spark plug | NGK C5HA |
| battery | GS(Nihon Denti),GM4-3B |
| battery capacity | 12V 4Aｈ |
| cooling system | water cooled |
| cooler | handmade radiator |
| volume of coolant | 250cc |
| volume of lubricant | 5W-30,30cc |
| lubrication system | weigh up. |
| clutch type | centrifugal force expand inside. |
| drive system | chain |
| gear ratio | first 2.25,second 4.42 |
| total gear ratio | 9.9375 |
| carburetor type | KEIHIN PB-12 |
| throttle valve diameter | 13mm |
| venturi diameter | 12mm |
| slow running jet | #38 |
| main jet | #55 |
| jet needle | #1 |
| engine weight |