I'm reading "Motorcycle Basics Techbook" Haynes, 2nd Ed.

It's telling me that for cold starts "chokes" can either be:
1)"tickling" the float valve to get more fuel in the bowl (only on lawnmowers now)
2) "Cutting off" the Venturi.
3) Or supplying more fuel through a completely separate enrichment circuit.

I'm reading the tech/ref section, but I'm impatient. Can someone tell me which method our choke uses? Thanks. I'm guessing #2.

Great. Thanks, Steve.

Wondering why I don't see a separate jet/nozzle in the fiche for that circuit. Something like a "starter jet".

Sorry if this is already on the list somewhere. I have skimmed the carb section of tech.ref, but I may have missed it. If someone knows where I can find it, then I wouldn't be offended if a link was provided rather than say what has already been said.

The Transient Enrichment Valve is on the opposite side of the carburetor from the choke.

I call it the brake pedal side of the bike.

Kenny G

Andy,

The TEV has nothing to do with choke, as I understand the TEV allows a little fuel into the system when you turn back the throttle. I clean my TEV regularly because I think it helps reduce after firing. If you clean your TEV obtain new screws before you disassemble and use Never-Seize on the threads for reassembly.

Kenny G

Andy,

You will have to wait on one of the more knowledgeable people to answer the choke question, that is above my pay grade.

Kenny G

When you pull on the choke......there is a little plunger that moves away from being seated on a passage.  The open hole allows more fuel to flow into the idle circuit....when you apply more throttle the affect of the enrichment becomes less, as the enrichment doesn't add fuel to the main jet circuit.

I couldn't find any photo or diagram that showed it well - you just have to trust me on this one until you tear a carb down and analyze it yourself.   The graph below shows the idle fuel mix screw on the bottom - but on the Savage it is located father up on the side....and this carb does not have the TEV.

The diagram came from an Google "image" search for a CV carb.

The air jet is not after the slide....you are putting 3 dimensional thinking on a 2 dimensional diagram.  The dashed line is a passage that passes through the casting, and it is not connected to the venturi.  The air jet is in the cavity underneath the diaphragm(18) for the slide, and that space is connected to the large air opening (15) at the top of the carb throat.

The air jet (9) is where the main jet/needle jet gets the air to mix with the fuel, and the jet (16) is where the pilot jet circuit get the air to mix with the fuel.

Both air jets (9) and (16) get filtered air at atmospheric pressure (minus whatever loss might occur as result of the air filter restriction).

Dave said
The diagram came from an Google "image" search for a CV carb.

And I say

Bullshit,, Dave freehanded that while playing three dimensional chess with Spock, and beating him.