Carlos,
The earlier 200's had problems w/ the crankshafts breaking. They were using the crank from the 150's and the 200's just produced too much power. 3W has corrected the problem by replacing the crank w/ a newer beefed up version and also replacing the hub w/ a new 6mm version.

They will warranty the crank replacement but you would have to pay for the new larger hub. This motor puts out gobs of power and torque is out of this world. Once these updates have been performed the motor is as good or better than any in its class.

Hope that helps.