Rj-+2+stroke+vs+4+stroke

http://motocrossactionmag.com/Main/News/YOU-ASKED-FOR-IT-MOTOCROSS-ACTIONS-TWOSTROKE-VERSU-7117.aspx

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References
Tuttle, A. (2013). 2 Stroke vs 4 Stroke Dirt Bike - How They Measure Up On The Track. [Blog]. YOU ASKED FOR IT! MOTOCROSS ACTION’S TWO-STROKE VERSUS FOUR-STROKE SHOOTOUT: YAMAHA YZ250 VERSUS YAMAHA YZ250F. (2012). //Motocross action magazine//. [online] Available at: http://motocrossactionmag.com/Main/News/YOU-ASKED-FOR-IT-MOTOCROSS-ACTIONS-TWOSTROKE-VERSU-7117.aspx [Accessed 7 May. 2014].

I believe that 2-stroke dirt bikes are better than 4-strokes. This is because they are easier to work on, more power, and require way less maintenance. There are many ways that 2-strokes are better than 4-strokes but these are some of the main ones. But there are some ways that 4-strokes are better than 2- strokes. For this paper, were going to compare a YZ250 (2-stroke) and a YZ250F (4-stroke). 2-stroke dirt bikes are most definatly easier to work on. In comparison, a YZ250 (2-stroke) has no timing chain, no engine oil, no cams, and has less rings on the piston. Where as a YZ250F (4-stroke) has a timing chain, engine oil, more rings on the piston, and a completely different head on the motor. Although 2-strokes are easier to work on, they aremore expensive to ride. You have to mix the gas and oil together each ride, where a 4-stroke you can run premium 93 pump gas. Another advantage a 2-stroke has is, they have more power. The YZ250 makes 30.6 foot pounds of torque, and the YZ250F makes 20.1 foot pounds of torque. Also the YZ250 makes 46 horse power at 8,500 rpm’s, and the YZ250F makes 36 horse power at 11,300 rpm’s. These are peak horse power and torque ratings for these two dirt bikes. Although the 2-stroke may make more power, they do not have the low end torque at the snap of a throttle like the 4-stroke does. The 2- stroke dirt bikes are less maintenance also. The YZ250 has no engine oil to change out, only transmission oil. And the YZ250F has engine oil that has to be changed after a certain period of time. Also some 4-strokes have engine oil and trasmissin oil, but most 4-strokes use the same oil for the engine and transmission. Also the 2-strokes don’t have valves in the head to adjust if they get loose or tight, as in the 4-strokes. But the 2-strokes do require to be rebuilt more often than 4-strokes. Hopefully after reading this, I have convinced you that, even though they arent flawless, that 2-stroke dirt bikes are better than 4-stroke dirt bikes. There are different opinions about the two different kinds, but in my opinion, with research and sources provided, 2- strokes are better. 2-strokes are better because they are easier to work on, have more power, and cheaper to rebuild.