I received my XM-3500li back in the beginning of December 2009. I rode it for a week before disassembling it to modify it with an extra 4 lithium cells, a BMS, a 4.5KW motor and a controller with regen.
It got to be too cold during the winter to really work on it, but now that things are warming up I'm excited to finish this conversion.
Yesterday I removed the rear hub motor wheel and took it down to the local motorcycle shop with my new 4.5kw Kelly hub motor to have them swap the tire and disk brake. Today I tried to mount the new motor on the moped, but I came across an unexpected problem: The original motor's axle has cut-outs on both sides to hold it securely into the frame. The new Kelly motor only has the cut-out on the side where the electrical cables come out, but not on the side with the disk brake.
I've attached pictures of the problem. So what do I do? I have an angle grinder that I could use to cut down the axle, but I'm afraid I might damage the thing.
I've heard of others creating XM-4500's, so how'd you make it work?