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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Parents need encouragement
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[QUOTE="FruDaddy, post: 1195587, member: 63076"] No, I have not ridden an 85 2-stroke, but my base knowledge on engine dynamics (although some here may know more about the subject) tells me that small displacement engines, expecially those with small bores, that are tuned for high RPM power rather than bottom end torque, basically have no bottom end. Now remember that my generalizations don't take into account rod length, stroke, or bore, I am anly talking about single cylinder displacement. The only way to get a tiny motor to produce a ton of power up top, is to take it away from the bottom. While I have no doubt that the 85's, especially non-powervalved (I believe some have the valve), have a bit of a hit, and are more powerful up top, they do have greater potential for bottom end torque, and thus are not likely to be as violent at the 65's. I also believe that the hot rod 50's would be even more scary if they were equipped with manual clutches and not tuned to start pulling after the power hits. BTW, I have also felt some pretty nasty spikes on mid sized street bikes, typically having 4 small cylinders instead of 2 larger ones. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Parents need encouragement
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