Subject: stacks, chopsticks, and the new Stone touring edition
Author: Michael Jones
Date: Oct 24, 2002, 9:09 AM
Post ID: 1711264620
loopfram-@topica.com
Hi, Andy. My early �69 Ambo has small velocity stacks
on the carbs. I have Uni filters that fit onto them
pretty well without any modification.
(Andy wrote: �hi guys! i have a Q, too. Keith's bike
doesn't have velocity stacks, but my eldo does what
exactly is the purpose of these thangs? will they
improve the air-flow? make her run cleaner [stronger?]
seems like a while back, Mark E. said that he had
several sets, some machined down to accept K&N's.
guess i shoulda paid more attention. tia, andy �)
Hi, TT. The chopstick method was bandied around a
couple of years ago, on the MGNOC list, I believe. It
is a method of balancing the carbs so that they
accelerate evenly off idle. I actually used my kid's
paintbrushes instead of chopsticks. The method is
quite simple: remove your air filters (assuming you
have pods of some sort) and insert a chopstick into
each carb, under the slide, until it won't go in any
further. Then turn the throttle a little. If one of
your carbs is opening before the other, the end of the
chopstick in that carb will dip before the other one
does. Because of the length of the chopsticks, the
small amount of movement of the slide is amplified in
the chopstick, thus facilitating fine adjustments,
which are made using the cable adjusters on top of
each carb. I have set my carbs audibly, as mentioned
in Guzziology, then did them by feeling the movement
with my fingers, then went to using dial-type vacuum
guages, and now have finally had the chance to try the
chopstick method. I understand that what is really
important is that the velocity of air moving over the
needle jet is the same in both carbs, and that
adjusting the slide height in order to achieve this
assumes that several other factors are consistent
between the carbs, but as my bike runs better so
adjusted I infer that the other relevant factors must
be sufficiently consistent.
(TT wrote: �Okay, I'm pretty new to the whole Guzzi
thing...What is the chopstick Method? 74 4ls Police�)
Have you guys seen the new all-black touring version
of the California Stone? Boy am I sorely tempted by
that. What a neat looking Guzzi. I would love to have
one of those (and an SP1000, too: a collection of
three). But my Ambo is running so well that there is
just no good reason to have another bike. I generally
ride it rather gently, like a loving parent, but now
and then, as yesterday when waved through a changing
light, I open that throttle more quickly then usual,
and am often surprised how well that old beast
responds. It emits a throaty growl and charges down
the rode just like I would want of a new bike. Except
for the mediocre brakes, I can't see why any other
bike was subsequently built. (OK, I'm exaggerating a
little in order to adequately express myself.)
-Mike (69 Ambo)
=====
M.Jones, student of philosophy and religion at Temple University, Philadelphia, PA.
"The heart has its reasons which reason does not know." -Blaise Pascal
"With man, instinct and reason avoid each other with adversity, yet, by repudiating each other they lure each other to reach mutual correction." -Lucian Blaga
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