Plugging air injection system ports.

[Semper Gumby]

Hmm...I suppose you could just soak 'em to get them cleaned.  Then you could keep them on without the popping.  

[montmil]

If the 'snorkel' valves in the airbox ...

Valves plural? You're referencing the "duck lips" in the lower aft area of the airbox? Both my R65s have only one kazoo whistle. You aren't talking about the twin snorkle-like tubes above the air filter?   Monte

[montmil]

It is a metric drain plug from an oilhead model engine - a perfect fit for this application and used by most people who plug these ports.

I just recently removed the "air" fittings from the eBay-sourced R65 heads. An hour or so soaking in PB Blaster and they came away smoothly. Whew.

Gotta be Oilhead drain plugs? Engine or trans or all same all?

Monte

[Bob_Roller]

It can be off of any bike, as long as the plug diameter and thread match .

I plugged mine in 1983, with aircraft hardware plugs, it must be one of those sizes, that metric, and 'American' sizes match,  or least close enough to work .

Like the screws for the carb tops, it's close enough, for a 10-32 screw will work as well .

[Ed Miller]

If the 'snorkel' valves in the airbox ...

Valves plural? You're referencing the "duck lips" in the lower aft area of the airbox? Both my R65s have only one kazoo whistle. You aren't talking about the twin snorkle-like tubes above the air filter?   Monte

That's not what he means.  I don't know the correct name, though.  The little vacuum line that goes up from each carb to a T in the air box actuates a pair of valves in the pulsed air system, shutting it off when a vacuum is detected.  When you let off the gas or are coasting down a hill in gear the vacuum is high enough to do this, and it stops (or reduces, anyway) the popping.

You can use a Mity Max vacuum pump applied to the carb line (pinch the one on the other side, or you'll just suck air through that carb) to test if they are working.

[chewy4x4]

Can anyone post the part numbers to the parts one would need to remove the Pulse air system

[Yikes]

Snowbum has all the info you need and more in his article on removing the system.

http://bmwmotorcycletech.info/pulseair.htm

[Ironhead2]

I picked up a set of these from sales@capitalcycle.com. Installed this weekend & they work great. Thanks for the tips from above.
ITEM#                DESCRIPTION                            QTY    TOTAL    
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07119919117          OIL DRAIN PLUG 16x1.50                 2      $5.70