[ausev] Motorcycle project, rear differential.

[Ellison, Tom F.]

Dan
I made a list of the differentials for independent rear suspension autos
starting from a tip I got on ausev.  At the small end of the list is the
Mazda Miata and there was one on Craig's list in Austin recently.
Speedway Automotive also has a moderate size quick change differential
that is used with Porsche half shafts, probably costly and very limited
slip, but fun to have control over gear ratios.
Looking forward to seeing a picture of your project with the 34" track
concept.

Tom

-----Original Message-----
From: ausev-bounces at austinev.org [mailto:ausev-bounces at austinev.org] On
Behalf Of jtp
Sent: Tuesday, October 31, 2006 3:51 PM
To: eeyore at phototropia.org; AustinEV News Announcements and General
Discussion
Subject: Re: [ausev] Motorcycle project, rear differential.

Chris,
  THANKS!   That's the place.
I just got back from the BMW motorcyle dealership and also the Woods Fun
Center on Braker/IH35.
  The BMW dealer was really really interested in my plan.
He said while an offset of cost against a new motorcycle with engine,
etc
resale could work, it would be far better to spend a lot less on a good
used
motorcycle.
  The differentials on the various ATV's at Woods did not look like they
would be robust enough.  Although I did like the idea of an integral
disc
brake rotor on one design in particular, (another had an integral drum
brake
assembly),  the idea of a simple pinion and spider gearset was not
appealing, even though the rear track is to be less than 34 inches with
fiberglass body.
 Erik mentioned a golf cart differential.
 How about a golf cart scrapyard?   It looks like the final drive needs
to
be the first point of the decision making process for this first one. It
does make more sense that a golf cart load capactiy as well as the
acceleration inertial loads would be handled very nicely with Erik's
suggestion of a golf-cart rear axle. I need to go see one somewhere.

Dan.


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