bing CV carbs

[michael]

First thanks for all the advice I have received from this forum. Are there starter settings for the adjustment screws on Bing 64s. I have rebuilt them and don't know where to start for proper tuning.

[chasbmw]

one to 1.5 turns should get you started,

what bike as will vary?

Charles

[Motorhead]

even the cables as close

the idle screw touch the lever then 2 full more

mix screw 1.5 turn

mack sure valves are set motor timeing static timed

[Jean]

Depending on which "64" and which bike, the intitial setting ranges from 1/2 turn open up to 1-1/2 turns open.
MOST all the 64/32's are 1/2 turn but there are a few exceptions that want 1 turn.
(The "slide-carbs" are all "different")

[barryh]

Maybe this helps.

Something I saved to file. Sorry I can't acknowledge the source. I believe it was an Airheads.org contributor but since they shut the public out I can't check.


Factory Pilot Mixture Screw Settings
When rebuilding or completely resetting a carburetor, the pilot mixture screw is tightened all the way down, and then backed off (counter-clockwise) a specified number of turns. Once adjusted and while the bike is running, listen for ???? and tighten or loosen for finer adjustment. Bing carburetor model numbers sorted by turns.

1/2 turn
64/28/201, 64/28/202, 64/28/301, 64/28/302, 64/28/303, 64/28/304, 64/32/203, 64/32/204, 64/32/307, 64/32/308, 64/32/347, 64/32/348, 64/32/201 (US), 64/32/202 (US), 64/32/223, 64/32/224, 94/40/107, 94/40/108

3/4 turn
64/32/305 (UK), 64/32/306 (UK), 64/32/321, 64/32/322, 64/32/325, 64/32/326, 64/32/335, 64/32/336, 64/32/349, 64/32/350, 64/32/351, 64/32/352, 64/32/353, 64/32/354, 64/32/357, 64/32/358

1/2 - 1 turn
64/32/9, 64/32/10, 64/32/11, 64/32/12, 64/32/13, 64/32/14, 64/32/201 (UK), 64/32/202 (UK)

1 turn
64/32/19, 64/32/20, 94/40/109, 94/40/110, 94/40/113, 94/40/114

1 - 1 1/4 turn
94/40/103, 94/40/104, 94/40/105, 94/40/106, 94/40/111, 94/40/112