they just do
Yep, they just do it.... :)
I guess you're wondering how do they get an engine that's in my car, into this small bike. Well although these engines work like the one in your car, they are very different. To start with, there's only ONE cylinder, as opposed to four or eight (or whatever) in your car. And the second big factor is that the engine in you car is at least 1 liter, probobly more. 1 Liter is 1000cc. Dirtbikes are usually up to 450cc. There are some over 700cc but definitely not more than a liter.
So there you go. You have a SMALL four stroke engine, now you can put it wherever you like. Answer If you go back in history a few decades, you'd that most, or nearly all offroad bikes were 4-stroke. They were heavy, and not especially fast, but then few offroad bikes were (fast). 2-strokes were dirty and didn't like running at low speeds as one must when riding offroad- the sparkplugs would foul up. Air-cooled two-strokes were prone to overheating and seizing, as well.
A 2-stroke dirtbike will be powered by a 2-stroke engine and a 4-stroke dirtbike will be powered by a 4-stroke engine. For the same power, the 2-stroke will be a lighter bike. For the same weight, the 4-stroke will be a weaker/slower bike. The 2-stroke is likely to use more fuel and make more noise. The 4-stroke will run cleaner and quieter.
Depends on if this engine is a 2 stroke, 4 stroke, or rotary engine. I assume you are referring to a 4 stroke as found in the vast majority of automobiles built today. The answer is, At the top of the compression stroke. The 4 strokes of a 4 cycle engine are:# intake/induction stroke # compression stroke # power stroke # exhaust strokeDepends on if this engine is a 2 stroke, 4 stroke, or rotary engine. I assume you are referring to a 4 stroke as found in the vast majority of automobiles built today. The answer is, At the top of the compression stroke. The 4 strokes of a 4 cycle engine are:# intake/induction stroke # compression stroke # power stroke # exhaust stroke
they suck ^^ First off let me say I agree. If you're talking about modern MX bikes (not those old crazy guys with road bike engines in dirtbikes) people always tried to race 4 stroke trail bikes with little success in 250 class. It was in 1998 that Yamaha developed the YZ400F and WR400F two high performance, water cooled 4 stroke bikes, one for tracks and one for woods. The bike was the begining of the 4 stroke revolution and the same 400 4 stroke engine went on to win the first AMA championship on a four stroke.
two stroke engine are better than 4-stroke engine in the following ways:- in 2 stroke engine there is only one revolution of crank shaft and in each revolution the power is delivered (in power stroke). thus it has a good mechanical efficiency rather than the 4- stroke engine. also the power we get through 2-stroke engine is double than the 4-stroke engine because of the same reason written above. 2-stroke engine is lighter than the 4-stroke engine because in 2- stroke engine there are no valve mechanism thus no push rod, cam-follower arrangment, rocker arm etc, thus 2-stroke engine is lighter than the 4-stroke engine. in 2 stroke engine in each revolution the power is delivered (in power stroke) thus torque is uniform, hence less torsional oscillation occurs.
50cc 4-stroke 50cc 2-stroke,65cc 2-stroke, 70cc 4-stroke, 80cc 2-stroke, 85cc 2-stroke, 110cc 4-stroke, 125cc 2-stroke, 125cc 4-stroke, 150cc 2-stroke, 150cc 4-stroke, 200cc 2-stroke, 250cc 2-stroke, 250cc 4-stroke, 300cc 2-stroke 350cc 4-stroke, 450cc 4-stroke, 500cc 2-stroke, 530cc 4-stroke, 690cc 4-stroke
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