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Thanks Steve!

It is confirmed that the hole in the atomizer nut faces the air intake!

If you don't know, then ask here...you will get the correct info and parts!

God bless,

Jake

Thanks Steve!

correction: idle circuit is "towards the motor"

I've studied my carbs and the Dellorto motorcycle tuning guide and I believe the hole must face the air intake (away from the motor) which aligns it with an air intake passage for air which "is mixed with metered fuel" from the atomizer ...

Here is a link to show the nut which presses into the carb body at the bottom of the throttle body venturi. http://shop.bevelheaven.com/detail.aspx?ID=1436

The atomizer threads into the bottom while the top hole in the atomizer nut atomizer recieves the needle....so the one hole remaining is on the ...

I seem to have early PHF carbs. The atomizer nuts were missing so I bought the ones available here. While there is a flat on the new nut my carb body has no corresponding flat.

How do I correctly orient the nut when I place it in the carb body?

Thanks!

Jake