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Mud in Your Eye

2-Stroke/4-Stroke Debate Settled?

Thursday, February 16, 2012
2-Strokes rule! Braaaap!

4-Strokes rule! (The YZ400F came out in ‘98 and still nobody knows how to speak or type in 4-stroke.)

It’s the biggest, deepest rift between dirt bikers. This is the argument that breaks up lifelong friends and alienates family members. We catch grief about the subject every time an article is posted that even vaguely mentions 2-strokes. Yell and scream about it all you want. Below is a cool graphic that hits some key points. It’s by no means an all-knowing document of truth, but at least it sheds some light on the subject. Let the debate continue!

(Bonus points for anyone who can spot the error in the chart.)



via: Motocrossgear.com
Post Tags: 2-stroke dirt bike, 4-stroke dirt bike, 4-stroke vs 2-stroke
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Comments
gjbruny February 19, 2012 04:02 PM
torque specs on the 2 stroke should be about 10-12 foot pounds higher if we are talking about a Yamaha...... higher for the SX250 (same with the HP rating.... SX250 is nearly 50hp) peak torque #s should be on par with the 450
509MXFan February 17, 2012 01:20 PM
A lot of unintentional verbage makes it pretty clear the graphic/storyline was made by a 2 stroke fan. Starting with weight - I'm fairly sure there are a couple 450's that ready to run are under 245lbs. Then the cost of a 4 Stroke exhaust can be triple the cost of an entire 2 stroke motor? What a full ti exhaust with carbon can vs. a piston and ring? Really? Who would have thought? The easier to control 4 stroke can instill over confidence and cause crashes. Yes, the easier to control platform will cause you to crash more... In slick conditions the 4 stroke will "tend to perform better" vs in sandy conditions the 2 stroke "will handle better". And on and on. Bottom line: Amatuer Racers can run 250cc two or four stroke bikes in the same class here - the four strokes keep winning. Even at the power disadvantage, the control and better chassis makes them better bikes. Even the "new" 2012 Yamaha YZ250 is no different from the 2005, the four strokes have been developed. If you're not racing, and playing in the woods, the cheaper initial cost and lower cost of maintenance makes the two stroke an ideal option.
JC February 17, 2012 08:44 AM
Good eye, Obert106! For some reason that thing stuck out like a sore thumb to me. That Unicam head is unmistakable. You're the only one to spot it so far. Even the Facebook followers have missed it.
Obert106 February 16, 2012 06:25 PM
in the pictures of the motors with all the details the 2 stroke motor is actually the motor from a crf250r