Topica Loopframe_Guzzi Archive


Subject: RE: Shifting issue

Author: Greg Bender

Date: Jul 6, 2005, 5:00 AM

Post ID: 1719121124



Okay, Dorien, it sounds like the clutch is operating smoothly. That's
good. Could you describe what you mean by "clonky in sound and not
always smooth" a little more? The loops are always a little as you
describe, especially after they warm up - oil thins a bit, case expands
a bit, a little more free play here and there - but too much can be an
indicator that something else is going on.

Also, since you have a 67 V7, it *probably* has straight cut gears in
the four speed transmission (there were at least three combinations of
straight vs helically cut gears in the four speed boxes). I think the
straight cut gears will make more noise. Plus, if it has never been
shimmed, that will certainly add to the clunking during shifts.

You've probably noticed that sometimes you'll need to hold the gear
pedal down until the gears engage. This is "normal" and is an artifact
of the ears on the sliding muffs not engaging with the fixed ears on the
gears of the output shaft. Nothing wrong about it and nothing to do to
fix it. Just a characteristic. Just keep the pedal pushed down until
things rotate around and the ears fall into place. You'll probably
notice this more at slower speeds in lower gears than at faster speeds
in higher gears.

Dorien Berteletti wrote:
 

Greg Bender wrote:
 
Hi Dorien,

To me, this sounds more like a clutch problem than a transmission
problem - perhaps your clutch input hub is notched? For whatever reason,


it seems like that problem shows up much more pronounced when things get


heated up. Do you know the condition/history of the input hub?

Hi Greg,
Thanks for the idea. No I have not taken the engine / treansmission out,

so I don't know it's condition.The clutch seems to release well even
when hot so that part is OK.
Dorien
 
Dorien Berteletti wrote:
 

Hi Guys,
On my 1967 V7 in the first 1/2 hour of riding the shifting is quiet,
smooth and nice. With time it gets clonky in sound and not always
smooth. I have 90w oil in the box. Is the case expanding with heat
causing the problem? My 61 Falcone uses engine oil in it's box. Nicest
shifting bike I have ever had and after 200 miles of hard driving no
changes. Any thoughts?
V7



Regards,

Greg Bender
1971 Ambassador
2000 Quota
http://www.thisoldtractor.com/gtbender

Florida MGNOC website
http://www.thisoldtractor.com/fl_mgnoc

Minnesota MGNOC website
http://www.thisoldtractor.com/mn_mgnoc



V7



Regards,

Greg Bender
1971 Ambassador
2000 Quota
http://www.thisoldtractor.com/gtbender

Florida MGNOC website
http://www.thisoldtractor.com/fl_mgnoc

Minnesota MGNOC website
http://www.thisoldtractor.com/mn_mgnoc

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