TOPIC:

hi everyone.

i have a 1979 japanese model imported into australia in 2015.
the bike has an air valve assembly unit as shown on the 3 photos provided.
this assembly unit connects with the numbers correlating back into the bike as shown.
the question is:
has anyone ever gone through the exercise of doing away with this air valve assembly and if
so what is the procedure.....?
is it a relatively easy exercise and is it effective, leaving the bike running smoothly ?

right now i can start the bike ok but the idling is rough.....
the carbies and the coils have been done.

thanks in advance
marc

You've essentially removed it ! Just plug off all the open ends. Replace the two intake vacuum nipples with bolts, like the others. With or without the "air-system" there should be no influence on the idle, providing there are no vacuum leaks.
Some, including myself have removed the Reed-Assemblies and the Boxes, down to the top of the valve cover. This is more cosmetically appealing, in my opinion, removes heat retaining mass from the cover and provides abit cleaner flow of air over the entire cam-cover. The remaining ports in the cam-cover that would have injected air into the exhaust can be welded closed or filled with high-temp. epoxy. I used epoxy over 25 years ago and it's still intact. (Easy and inexpensive)
Some else can chime in on "the rough idle".
hope this helps.

Not sure if this is of any value in the discussion but the Canadian models (at least in 79) did not have this plumbing. The reed valve caps were there but there was a blank plate underneath them. The valve ports were either not there, or were blocked off by the plate (It's been so long since I had the head off, I can't remember).

thanks scotch for the info....
im not sure what you mean about the reed assemblies and the boxes...?
what are these....? do you mean the air filter with its entire 3 box plastic assembly...?
or is the reed assembly specifically the box shown and labelled as A in the 1st photo?

The "reed" assemblies for the "Air Injection System" are discussed in the manual. Hint: If they were in the Air-Filter you'd be riding a musical instrument. :
On the other hand a well tuned engine is music to my ears - but not Bag-Pipes