I bought an EVT 4000e from a friend. It has worked well for the past 400 miles but now something is wrong. The other day when I was starting home from work, it started "missing". I turns out that only like 1/2 of the motor is pulling. When I take off, the bike goes "cunk, cunk, cunk, as the wheel rotates from power to no power and back to power. When I put it on the stand, it won't move the tire... when the power is on... unless I rotate the tire by hand to the "power cycle".
Any ideas? Electric Motorsports in Oakland can't look at the bike for 2 weeks or more.