TWO VERSIONS OF THE SAME CARB
There are two versions of the 1982 Vision carb, an early version
and a late version.
These changes seem to coincide with the mid year
addition of the air box flapper, BUT it seems, in many cases this seems
Not to hold true.
Do not assume that because you have the vacume
operated flapper you have the later model carb.
way to tell the difference between the two carbs is the addition of a stop
screw on the accelerator pump linkage. The reasons for the changes
were obviously to cure the carb related performance problems that plagued
the bike early on. What other changes were made I cannot say, as I
don't have a late 82 carb to compare with, but most likley, fuel metering
& delivery was the focus.
It is worth noting that the 1983
carb is a completely different animal, and only a few parts are
interchangable with '82 carbs.