As said before, The cool thing about chain combos is that you can
mess with the gearing. If you want more torque, put on a bigger
sprocket on the rear wheel. Top end speed will suffer though.

If you want to go faster, put in a smaller sprocket on the rear
wheel.. but you will lose some torque and hill climbing ability. This
is the best option I think if drive on relatively flat roads all the
time. I believe this will also give you greatest range? Right?


--- In lectra@yahoogroups.com, Jim Leung <hk_jl@y...> wrote:
> I agree with Scott.
> Being a sportbike enthusiast, one of the first major things when
considering
> performance, is "unsprung" weight. The hub motor is great when
considering very
> upright wheeled vehicles (cars and scooters), but in any kind of
normal
> motorcycle, where leaning is involved, a hub motor's high unsprung
weight is a
> curse. It is bad for handling, emergency maneuvers and stability.
>
> Along with it being unsprung weight, is Scotts great observation
that the motor
> will be feeling every bump, rock, and pot-hole that the wheel
touches.
>
> -Jim
>
> --- Scott Cronk <scott@e...> wrote:
>
> >
> >
> > I've seen it and ridden it -- it's nice.
> >
> > Re: Chains. A chain is the most efficient way to transfer power
from
> > a motor to a wheel -- more efficient than gears or belts. We did
have
> > chain stretch on some early Lectra, but later upgraded to a DID
Pro
> > chain and the problem of chain stretch greatly reduced. If fact
the
> > wear on an electric motorcycle should not be much different than
that
> > on a gas cycle. (Just make sure you don't use an o-ring cahin --
the
> > rubber o-rings greatly increase drag and suck up battery and heat
the
> > motor).
> >
> > Wheel motors are ok, but have some drawbacks:
> > (1) High wheel weight which affects stability and handling;
> > (2) Questionable reliability with all those part being banged
> > constantly during riding (chains are much cheaper than new
motors);
> > (3) You're locked into a given gear ration (torque and power
curve)
> > whereas with a chain you can vary this with a sprocket change.
> > (4) Higher cost and generally less flexability than a frame-
mounted
> > drive system. (you need custom rims and mounts for a wheel motor).
> >
> > Sincerely Yours,
> > Scott Cronk
> > www.EnergyMatters.net
> >
> > --- In lectra@yahoogroups.com, wrumbarger@a... wrote:
> > > I agree, the best idea would be an electric hub motor.
> > > Unfortunately, the one's you can buy, are designed for bicycle
use.
> > > AND, the one's that are suitable for motorcycle use, are not
> > available to
> > > the general public.
> > >
> > > I have been trying to find a company that would sell a private
> > individual
> > > (me) one or two hub motors for an Electric Motorcycle project
that I
> > am
> > > developing for my personal use.
> > > I have been in contact with M4 in Canada, Wavecrest in VA, and
even
> > Bose
> > > (yeah, the speaker people).
> > > They all have great Electric Hub Motors, but will not sell them
to an
> > > individual (unless you want to consider purchasing hundreds of
units).
> > >
> > > Anybody have any other suggestions?
> > >
> > > Wallace
> > > How may I assist you?
> >
> >
> >
> >
> >
> >
> > http://groups.yahoo.com/group/lectra
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>
>
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