HR215 ED 3 speed stuck in 2-Any one else experience this? What's the remedy? Will not change to 1 or 3, and wheels stay at same rpm. I store with handle in vertical position, which some times effects the throttle cable. Throttle works ok. Wondering whether this storage also has contributed to the speed cable maybe having a problem. Everything else is okay. Or, is the speed problem in the clutch and transmission?