Timing belts, like those used in motorcycles and automobiles, have long been the choice for superior power transfer. Their operation is whisper silent with a longevity lasting hundreds of thousands of miles. Throw in the simplicity of CNC machined sprockets supported by 4 sealed cartridge bearings, and you have the new 4G Timing Belt Drive Bicycle Engine.
The 4G engine kit boasts an astounding 150 miles per gallon and all day cruising speed of 30 miles per hour. With a rope pull start for ease of use, these engines are designed for commercial and governmental use to consistently be ran at full RPM.
The 4G Timing Belt Drive is built for both the Honda GXH50 or its economically priced sister engine HuaSheng 142F. The 4G bicycle engine kit carries a 6 month warranty on the transmission, and a one month warranty on the engine.
In a pound for pound comparison, 2 cycle engines, like the SkyHawk GT5, traditionally produce twice the power of 4 cycle engines. This means that a 2 cycle motor can pack twice the punch of a 4 cycle and can be produced smaller and lighter. This is beneficial when designing a power assisted bicycle. With the advancement of micro 4 stroke technology, all of this is changing. The new generation of micro 4 strokes, including the Huasheng 142F, are nearly as light and just as powerful as their 2 cycle counterparts. With a 4 stroke engine you won't have to mix oil with gas like you do with a 2 stroke engine, but you will need to change the oil about every 1,000 miles. A 4 stroke doesn't need to cool off every half hour like a 2 stroke engine does, so you can run a 4 stroke all day long, even cross country. A 4 stroke engine is generally cleaner and quieter than a 2 stroke as well as much more reliable. The technology costs more to manufacture, however, you will find that the reliability pays for itself many times over. For fun, dependable transportation, get a 4G bicycle engine kit!