Is it a bad idea to entirely submerge the motor? We used to do it all the time.
The blue NEXT bike my fried had was taken out of commission after the front rim cracked. It was easier to just get a new $150 bike, which rides WAY better anyways.
It was less than 2 hours to get the new bike up and running.
Here is all 3 bikes together. Identical setups, on assorted cheap bikes.
Heres a fairly low quality video thrown together with assorted clips, intended for another purpose.http://www.youtube.com/watch?v=ijzDT1Bz6u0