Topic: Air screw needle O rings???

[timtune]

Just finished cleaning and rebuilding my carbs (external control) for a CB750F. All the air needles had a spring but no O ring. My bike was running fine with the carb as is before I cleaned it.

Just noticed Vintage CB750 sells replacement Air screw needle O rings. Whats the deal?

[ekpent]

If its a 1975-76 750F with round top carbs they don't have o-rings. Not sure on the 77-78 pumper carbs.

[timtune]

Thanks. By "round top" do you mean the ribbed round nut that holds the slide in? Those are the ones I have.

[david 750f]

Timtune, you need to post the model number of your carbs. They may not be original to your bike, all the carbs have a model number on them.

[TwoTired]

Only the bikes with PD carbs need o rings on the idle mixture screws.

Cheers,

[ekpent]

 If they look like this they do not use any o-rings there.