BS 34/38 exploded view

[Billy Ricks]

The velocity stacks in the filters are part of the rubber where they mount. They aren't stacks in the usual sense. If you look they have a curve to them that act as a short velocity stack. The mixture screws don't have a standard setting. Start at a turn and a half or so and go from there. Warm the engine up and set each screw for the highest idle. If you get more than 4 turns out you need richer pilots. There's no pilot jet inside the bowl to turn. They are located at the mouth of the carb and are fixed values.

[chuck hahn]

illy threr is nothing inside the pods...just the cage and the 3/8 inch wide rubber boot that slips over the carbs...one big hollow space.

[Roger P.]

http://www.amckayltd.com/carbguide.pdf

There's a section on tuning for modifications.

[Steve]

I am looking for both settings... the pilot jet inside the bowl i was told is 2 to 3 out..dont know if thats correct.
As for the air mixture screw on the engine side of the carbs i havent found any base setting for that yet. ....

Anything inside the bowl should be SNUG.

Everything outside the bowl should be SNUG, ...

except for the "idle mixture adjustment screw" that you are calling an "air mixture screw". That is the one that is mentioned, oh, so often on the board as being set between two and three turns out from lightly seated. Those are the same adjusters that come from the factory under sealed caps and adjusted extremely lean. My personal recommendation is to start at three turns. It assures enough fuel for the bike to run, although it might be a bit rich. When the bike warms up, you will be adjusting these for best running anyway, so don't worry that it's rich at this time.

Just so we're clear:



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