Topica Loopframe_Guzzi Archive


Subject: RE: wheelbase/wobbles

Author: Barry Swanson

Date: Apr 21, 2003, 6:30 PM

Post ID: 1712706012



Interesting Garry, thanks for confirming what I've been told by the
vendor, it's nice to get a 2nd opinion.
Your info raises another issue though, how many bikes are out there
being riden solo, but with fork angles designed for sidecar hauling?

Regards, Barry.


Gln-@aol.com wrote:
 Barry

Guzzi had an alternate top plate for the triple tree that kicked the
bottom
of the forks out to reduce trail. This makes the steering much lighter
which
is a great help with a side car rig. Same idea as with the BMW/2 earles
fork
models. Only draw back is that it makes the bike tend to go into a
wobble
when the side car is removed. Local dealer had one that he crashed on a
test
ride as it hit a pot hole and went into a wobble. I have the upper
triple
clamp from that bike and as I recall there is about 1/8" to 3/16"
difference
in the position of the holes for the tubes. The top of the fork tubes
are
pulled back which changes the rake and trail. It lengthens the
wheelbase by
about 1/2 inch. Makes for much lighter steering on a sidecar rig.

Garry in Oregon

 Subject: Newby....wheelbase/wobbles



Hi, my name's Barry.
I'm considering buying a 1970, ex LAPD Ambo 750, and I'm told it has a
longer wheelbase than most,thanks to its non standard triple tree/fork
angle, which gives more rake to the forks, and makes it more suited to
hauling the sidecar it's attached to.
My question: what's the standand wheelbase of this model, and can anyone

confirm that this triple tree/long wheelbase was infact an option.
I read with interest some posts to this list re speed wobbles, how
common a problem is it?
I have heard that the early /5 BMW's from the seventies had wobble woes,

so they brought out a the long frame version.
Did Guzzi do the same with the " Loopys "?
Thanks alot, Barry Swanson, New Zealand.

Entire thread: