Dirt bikes have manufactured by using either a two-stroke engine or a four stroke engine. In a two stroke engine the combination of oil and gas is catch fire in the tube and these not only does the bike obtain powered up but the engine is also oil. The four stroke Dirt Bikes engine is like a little version of the car engine where the gas is catches fire but the oil can also be applied again. If you are looking for variation between a usual street bike and dirt bike then you have to appear no further than the suspension of the dirt bike. They have a high ground authorization and not only this. They are greatly lighter as well. Their tires are also various and have deep step. The engine of the dirt bikes is also located at a much top level as compared to usual bikes to defend it from different difficulty like rocks etc.