Have yet to be into a pre 2001 E button motor with a balancer, but am assuming from the posts that the drive gear comes off the crank and the driven gear is machined into the balancer making the set quite expensive. Having owned an e start pre 2001 bike, was told by the dealer that the E start driving the motor caused all the problems ie broken gears and spragues. Simply remove the intermediate gear and starter and you have a balanced Berg that won't break. Of course you have to kick it, but such is life. And think of the weight loss with the battery and all removed. Now to help with your headache, Possibly Peter at HMS would have a used set.
dan