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Two Stroke Center-install Bicycle Engines | ||||
| Engine | ZM50-P(4stroke) | ZM60-P(F60)2 stroke | ZM70-P(F80)2 stroke | |
| Type | one cylinder, air cooled | |||
| Bore*Stroke | 40*38mm | 45*38mm | 47*38mm | |
| Displacement | 48cc | 61cc | 66cc | |
| Rated Power | 1.6HP/5000r/m | 2.7HP/5000r/m | 3HP/5000r/m | |
| Max power | 3HP/6000r/m | 5HP/6000r/m | 6HP/6000r/m | |
| Ignition | CDI | |||
| Start | Pedal Start | |||
| Clutch Type | Rub Bloc Drying | |||
| Compression Ratio | 8:1 | |||
| Fuel | 90# | |||
| Ratio f fuel and oil | 16:1 at the beginning; 20:1 after 500km running | |||
| Spark Plug | Z4C 14mm | |||
| Oil Consumption | 1.5L/100km | 2L/100km | 2.5/100km | |
| Max Speed | 30km/h | 35km/h | 38km/h | |
| Note: | ||||
| 1. As for the 80cc, in fact there is no such cc bicycle engine in china market, we called our 47*38(bore*stroke) engine F80 before ,but now we correct it, because its displacement is only 66cc(from EPA test report). | ||||
| 2. How to caculate the engine capacity. The fomula is listed below. | ||||
| The volume of a cylinder=(bore area)x stroke | ||||
| Bore area= Bore x Bore x pi / 4. (pi has a value of 3.14159) | ||||
| Take our ZM70-P for example, its bore is 4.7cm(47mm), its stroke 3.8cm(38mm) | ||||
| 4.7×4.7÷4×3.14×3.8=66cc | ||||
| 3. We have rear mounted hand start engine, but not showed here. | ||||
engine kit