Mike wrote:
"Well, I replaced plugs, condenser, points and plug wires yesterday to try and
eliminate the electrical, and.....no change. So I removed the air cleaner
and
eyeballed the carbs, which looked a little dirty. I placed a hand over the
front carb and starved it for air and it smoothed out quite a bit. Finally, I
attempted to used the adjustment tool that I bought at VB and THE CARB
WOULD NOT
ADJUST. No place for the allen wrench to get hold of down there. So, these
carbs do not adjust. (easily)"
The more I ponder it, Mike, the more I cannot imagine why Triumph would use
non-mixture adjusting ZS's on just one or two production years. I am now
convinced that all ZS's on TR250s and TR6s had the same provision for
mixture adjustment. However, it occurs to me that I may have read
somewhere that it is not unusual for the threads on the adjusting mechanism
to corrode in such a way as to bind up the adjuster, making it impossible
to rotate. Now, are you telling us that you were not able to get the allen
wrench to engage the adjuster, or are you telling me that once engaged, you
could not rotate it? From your comment, "No place for the allen wrench to
get hold of down there," it would seem that you could not get the allen
wrench to engage. I guess my next question is, where are you trying to
make the adjustment?
Also, have you balanced the airflow between the two carbs? The fact that
you noticed an improvement when blocking air to one carb suggests to me
that they could be out of balance by quite a bit.
Let me know how it goes, Mike. This whole thread has raised my curiosity.
Good luck!
Pete Chadwell
1973 TR6 CF10732
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