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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Understanding....rebound
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[QUOTE="will pattison, post: 24555, member: 19283"] i went back through and reread all these posts, and i picked up on something else: the question of the wheelie. i think it's appropriate to discuss it here, because the same phenomenon that causes that bit of fun also contributes to squat. i've heard people say that weight shift is what causes wheelies. hogwash. while it certainly helps us wheelie on a motorcycle, it's not the actual physics that gets the wheelie started. i'm a farm boy, and i've spent many an hour on the back of a john deere 4010. i can tell you with no uncertainly that it's possible to pop a wheelie on one. it's all about torque. the torque generated when we rack the throttle open generates angular acceleration...uh, that's acceleration about an axis. in this case, that is your rear axle. think about it this way. if you could skewer your bike about 10' off the ground with a rod welded to the sprocket, then some how get on it, put it in gear and go...well, you would- around in a clockwise circle. when you ride like the rest of us (on the ground), and that angular acceleration takes place at a higher rate than your forward acceleration, what happens? boom! the bike tries to flip over backwards, your weight naturally shifts to the rear and then you are showing off for the girlies with a sweet wheelie... fun thread for a geek like me. wp. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Understanding....rebound
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