Welcome to the club Going2Hell, Im on my 5th but I am fighting it all the way! Lost my job due to it, cant blame anyone buy myself though. I know what the laws are here, the authorities are pretty slack here for "bicycle looking" units.
Like I said I have a big huge hub motor in the rear, its a MXUS 3000W Version 2, that spits out 3000 watts nominal and 6000 watts max(peak) with a 18FET controller, my batteries are a123 m1b's that can sustain 70A cont, and 150A max(peak). Currently I have a downhill rim, from www.ebikes.ca
called a crystalite downhill rim, but I will be going to a 19" moto rim that puts it to about 24" diamater wheel with the tire. This helps in efficiency and torque. My bike was actually originally a brushed 36V lead acid, geared 350W motor bought from Canadian Tire, and the batteries went dead and they dumped it off at a community bike store, where I bought it for $200 b/c it was steel frame. My batteries fit in the custom downtube, so that area is filled. I burnt that motor out within a few days, the brushes fried on it and I just chucked it in the garbage bin. I already had my mxus motor.
I want to use this gas motor setup to pick bottles, I can do circles around the bums and the everyday pickers (pensioners, immigrants etc) and make $100+/day in 6 hours if I do it right and plan it out with blue bin pickups.
So if I go 50cc motor on the rear rack, beef up the rear rack, buy the shift kit, and gear it properly I should be alright?
I need low end power, stop and go stop and go all the time.
I was thinking also, I could do a pusher trailer, as I need a trailer to put my bottles in, and I can pick glass bottles too, where the others just skip over them when picking b/c they are too heavy.
As far as hills go, there is one hill that is 10-13% goes for about 75-90 meters that is my test hill. That is an extreme case, at most I would be doing 3-5% on long steady hills of 1km or 0.6miles to get from one area to the next and working my way in a grid pattern to maximiize my profits. But mostly all I do, is go like 5-10km/h and go from house to house, zig zagging across the alley, opening bin, look in, if its empty move on, if not I pick through it.
I will look into the shift kits, maybe a jackshaft if I need it, and sprockets to get my gearing perfect.