Crash: good topic, but being a gradeA suspension mechanic myself (KONI trained), then i will have to correct you on one thing:
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what's wrong with your bike looking at everything trying to figure out why your bike has the road holding ability of a drunken mountain goat and vibrates like a jack hammer.
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Road holding is produced by the shocks (forks are no exception), these keep your tyre planted on terra-firma without them, the contact of the tyre surface would not occur all that well hence the 'jack hammer' effect.
On cars and bikes alike the surface wear of the tyre should be round, flat spotting a tyre (as with bikes and cars) will happen and this is often caused by a 'dead' shock, the bump and rebound forces within the shock work together with the spring to give you a controlled ride (both with cars and bikes), its this unison of forces that gives you both a comfortable ride and a safe ride, it also allows the tyre to wear even over the entire surface, a dead shock will allow the vehicles tyre to bounce giving you flat spot areas over the tyre surface, its these areas that gives you that jack hammer feel.
So while checking tyres, also spend an hour and check the shocks for leaks and if need be, replace any dead shocks (unless the shocks are serviceable, then have the oil replaced), forks work much the same way and we all know how to replace fork oil dont we ?
With pocket bikes, it would be a good time to mention that the axles on most if not all of these bikes are prone to bending, if you have the time, take the axle out and check it, a bent axle will also cause the 'wheel bouncing'.
thought id throw those points champ
