I've been riding my Tanaka-powered motorized bicycle to work daily since May.
Regular maintenance is critical to reliability.
My throttle stuck while starting the engine two days ago. I swear, it's prolly like holding onto a wild horse. After I hit the kill switch, I started it up and hopped on. The bike wasn't going anywhere in first gear. That's when I noticed the first gear sprocket on the cassette was bent over 2nd gear. Late for work, so I simply used 3rd gear and up. I couldn't climp the ramp at work, so I walked the bike into the office elevator, then out to the 4th floor parking lot. Riding home, I knew I wouldn't be able to ride up the steep hill or the footpath alongside it. I pushed the bike up the hill, which made me VERY tired. At the hilltop, I put the bike in 3rd gear and motored home. Luckily, I had purchased TWO 11t-34t cassettes on ebay. During lunch hour yesterday, I removed the wheel and took it over to my local bike shop nearby. They replaced the damaged cassette, lubed the hub and trued the spokes. At day's end, I rode home, happily riding my bike up the steep hill near home.