wheel balancing ?

[Skidmarx]

Imo, as a car/4wd/truck tyre fitter, definatly have the front balanced, back tyre isnt so crucial, personaly i fit/repair my own back tyres, and never have them balanced before putting them back on the bike, but iv never had an unbalanced tyre on the front, so i cant realy say what kind of effects it would have, but id guess it would give a front end shake

didn't you get spat of your bike unexpectedly in a straight line? Could this have something to do with it?

iv just checked back up on this thread for that very reason, now that i think of it, its quite possible, in a car, un balanced tyres will make the steering wheel shake side to side, im no expert with bikes, but if it has the same effect on bike tyres, then yes very possible