Finally started working on this again.
I decided to go with the 5T Mxus3000. Laced it into a 17" old steel moped rim. The clyte has just so much cogging drag. Dogman said it might have a trickle short in the windings. And, it was nicely built into the 24" bike rim, so I didn't want to tear that apart.
I had to extend the swingarm with some steel plate to widen the dropouts to fit 135mm. They are still a bit too narrow for the mxus. I was very happy to see that my hand-cut dropouts came out aligned and the axle slid right in. It helps to use calipers to measure your progress as you slowly file away to 10.3mm. There is room on the 3/16" steel plate for adding clamping torque arms down the line. My welder can't really handle welding these two plates together, but I think it's okay.
I test rode it the other night with a 52v 4ah lipo pack around the neighborhood. Motor is very torquey. I'm not sure what the controller settings are, but I think it pulls about 2500w at 50v. Seemed to top out around 25mph, which is more than I expected on only 52v. I will be running 75v or more.
I HATE old moped suspension. Right now I am ripping off the Moby forks. The shop gave me bent forks when I bought this frame, and they are trash. I might get 1" of travel. The rear shocks are maybe 3/4" travel - absolute trash. I will be putting mtb forks on this. I may have to get a 1" steerer fork, but I did find one with suspension and disc mounts: http://www.amazon.com/SR-Suntour-2013-C ... B00ACTMSB8
I will likely end up relacing the front wheel with a bike disc hub to fit in the bike forks, but to keep the 17" moped rim/tire. Or lace in a 20" bmx rim and try to get through inspection with a non-DOT rated front tire. Not sure yet.
But the Shinkos seem to smooth out the roads pretty well. They are definitely squishy compared to bike tires. But they also seemed to roll okay. I was holding my speed better than on my KE100. The Perm132 on that has about the same low cogging as the mxus hub. The KE is also about 180lbs heavier (but shouldn't that extend coast down distances?) I understand the heavier weight increases rolling resistance. I am anxious to see how my power draw compares on this to my ebike with 26x2" bike tires. The Shinkos grip should be a good thing too.