What controller are you using? The alternative to a different gear ratio is
more amps :-) It's possible that once you get moving a bit you will feel the
gear ratio you already is fine. If you have a contactor that is rated for the
job you can test this by hooking a battery straight to the motor through the
contactor. Try 12 volts first, then 24 etc... This will give you an
indication of what kind of acceleration you can achieve with your current
setup. Just be sure that the contactor is up to the task otherwise you may be
going for a longer ride than you intended with no way to turn the motorcycle
off :-(
My first ride on my motorcycle was right after I mounted the motor. I held a
13 ahr Hawker battery in my lap and connected it to the motor via a set of
jumper cables. I had some current limiting as I was only using 8 AWG cables.
I started off at 12 volts which moved me at about a walking pace and drew about
20 amps. Then I hooked two of the batteries in series for 24 volts which moved
me at a much brisker pace and drew about 40 amps. When I got to 36 volts the
jumper cable tried to weld onto the battery and I was barely able to pull it
off.
damon> Date: Thu, 7 Feb 2008 17:37:30 -0500> From: [EMAIL PROTECTED]> To:
[email protected]> Subject: [ElectricMotorcycles] bmw conversion
update> > Well, I actually rode the BMW under electric power today! It took a >
pretty heavy hand on the throttle to get her moving though, so it looks > like
I need to gear it down. Too bad, as I had made up a pretty elegant > connection
between the motor and drive shaft and the motor and batteries > all fit in
nicely. I guess the easiest thing will be to find a > transmission, but that
will require relocating everything. Oh well. But > it was sweet for those few
seconds; smooth and quiet.> > -SteveS> - yet unnamed R75/7 conversion>
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