I have had a long run of bad luck with frame suppliers. First Qulbix came out with their own hub motor mid drive and stopped making the Q76 that I made a swingarm drive for. Then they started again. Then they stopped again. They may be making them again, I don't know. Then I made an 18kW mid drive for the Motoped. Motoped went out of business soon afterward. Then I tried the ELEEK Lite frames out of Ukraine. They had a little problem with the Russians and then decided they didn't want to sell just frames. Plus they would ignore customers who would then come crying to me. Finally I decided to go with a more universal format made by multiple manufacturers. I'd also become aware that the SurRon and Bomber guys posting videos of themselves lane splitting on the freeway had created a negative impact on the high powered e-bike segment. I wanted something stealthier that wouldn't scream "arrest me and impound my bike" to law enforcement. The Bafang "Ultra" M620 drives were very generic looking, underpowered, and seemed to be resistant to hot rodding them. Perfect. I got a hardtail frame from South Bay Bikes in the San Francisco area and got to work. With a little bit of grinding and some KY jelly I was able to squeeze a 6kW LR Small Block into the Ultra shell. To the casual eye my Ultra drive looks very little different than the M620. I also used a belt primary to keep the noise level down to stealth mode. The bike scoots and (if you're in a place where it's safe and legal) does 55 mph.
