I think if you look closely you'll see a sport bike transmission is so tightly packaged you won't have room to fit covers and seals to close it up. Not to mention carving away the engine side of the cases and mounting the resulting metal potato.
How about a completely different approach - why not get the effect of a transmission with electronics? A Zilla controller will properly (important concept) shift two motors from series to parallel and back. If you have two motors they can each be smaller than a single motor. I'm thinking the ADC 5.5" series looks promising. Jim Husted might be able to dig up something even more suitable. There are a number of advantages with this idea. More comm area, "shifting" is ultra smooth because there is no change in rotational speeds, and the mechanical implementation is WAY easier. It is no doubt pricey (less so if you scrounge), but you might spend more in custom machining and reworking to adapt a transmission. It should be pretty easy to get a two-motor setup to work well first time out. One important consideration: The S-P shift can be made automatic for cars (senses current draw and shifts at a programmable point), but you want it to be manual on an EM. The shift results in a step-change in rear wheel power that could mess with your traction. Better to treat it like a normal two speed transmission that you shift, just like any other motorcycle. Except there are no gears. When you think about it, this achieves exactly the same thing for an EM that a gearbox does for an ICE. Gears on an EV are not typically the best solution. When we use them it's usually only because they came with the donor. Chris On Thu, Apr 3, 2008 at 2:25 PM, john fisher <[EMAIL PROTECTED]> wrote: > > As to using a sport bike trans, that would be an idea. The only > > oiling for the trans is a splash oil. The shafts run on ball > > bearings. So if you could enclose the case, you'd be all set. > > yeah I was assuming enough skill to be able to close up the box to keep > oil inside. >
