SuzukiSavage.com - Question about enrichment valve

drums1

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Question about enrichment valve
09/22/10 at 17:02:08

If the enrichment valve is slowly going bad, will I need to keep turning the throttle stop screw farther and farther in every time I ride to keep it idling properly? I dam near got the thing bottomed out when cold and 1-1 1/2 turns back when warmed up. I never used to have to do that. It used to sit about 3-4 turns out all the time. Seems like ever since I had my float problems, I have to turn the screw way in to get it to idle when cold, and as it warms up the idle speed increases, so I then need to back it off some. Getting worse and worse every time I ride. I've rebuilt the carb 3 times in the last year.
How much is a new enrichment valve assembly?
(I wish the savage fairy would leave a brand new carb under my pillow.....)

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28658 Tucson Az Gender:	Re: Question about enrichment valve Reply #1 - 09/22/10 at 17:34:27 I'm not clear on the question... Is the problem with the enrichment valve (choke), or the idle speed screw?.... ... or, are you talking about the idle mixture screw (right-side on carb)?....
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Lupo Senior Member Offline Posts: 356	Re: Question about enrichment valve Reply #2 - 09/22/10 at 22:40:03 ...yea, I saw this earlier and said, pass. about the only thing that came to mind was an air leak on the manifold but... PS , if there is a Savage Fairy, I doubt you'll get him to admit it.
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justin_o_guy2

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Re: Question about enrichment valve
Reply #3 - 09/23/10 at 05:34:50

I have to fiddle with the idle speed adj. too, but its just for the first 15 or so minutes of a ride. I pull the "choke" 1/2 way out, get it fired up & ride about 5 minutes, shove Choke in & the idle is too low, so I jack it up a bit, as it warms up, idle comes up, so I back the screw off a bit, but its not a lot of twisting. Just a bit of a twist. Maybe youve got a jet backing out?

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drums1

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Re: Question about enrichment valve
Reply #4 - 09/23/10 at 09:54:18

OK--When starting cold--I pull "choke" all the way out, and turn idle speed screw in 2 turns, just to keep it running. My idle mixture screw is frozen in place. After about 2 minutes, I can push "choke" in and ride. Just like Justin's--after about 15 minutes of riding, I can back off the idle speed screw back to where it started. Usually about 2 turns. The idle speed seems to pick up as the engine warms up. Lately though, I've been having to turn the idle speed screw in further and further to where it's almost all the way in, just to keep it running.
I'm thinking that maybe when the "choke" is all the way in, it might be blocking the idle port somehow, thus causing me to have to turn in the idle speed screw, to up the idle speed.
Make more sense now?

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Serowbot

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Re: Question about enrichment valve
Reply #5 - 09/23/10 at 10:36:22

Okay,... I'm thinking your choke/enrichment valve isn't working ....
Pulling it out all the way, should bump up your idle speed quite a bit... if you are having to crank the idle screw as well, the choke isn't doing it's job...

Carb cleaning with special attention to the enrichment circuit...

... a little variation in the idle speed as engine heats up is normal, but it should rarely require adjustment, if at all...

I doubt that I'm telling you anything that you didn't already suspect...
... just dreading having to go through the carb again, huh?... Wink

...
Best of luck...

You might check the enrichment circuit diaphragm on the opposite side to the choke,... but if that puppie's leaking, it's a $45.00 part...
I think it's only supposed to work on decel, but if it's leaking, I don't know what happens...
http://www.ronayers.com/Search/N/687/PartNumber/13480-05A10/Source/SU

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Routy

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Re: Question about enrichment valve
Reply #6 - 09/23/10 at 10:51:14

I assume mine is working like its supposed to, like this,.....
Choke out to start, then leave choke 1 notch out
It idles almost normally, only because 1 notch out on the choke is also a fast idle.
After a mile (or 5 min) or so I push it in all the way for a perfect idle.
I never touch the idle screws.

Of course, you know that you have something that is not operating correctly. I wish I could help you, other than tell you to clean the carb,....which you already did.

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Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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longmi01

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Re: Question about enrichment valve
Reply #7 - 09/23/10 at 11:31:16

Have you played with the idle mixture screw? This summer, I was having to do the idle speed adjustment on a daily basis before and after the bike was warmed up. I finally just turned my mixture screw out a full turn, and that made everything much more stable through warm-up.

I'm just thinking your bike is fuel starved at idle, and that's why you're having to open the butterfly to let the engine start sucking through the needle jet.

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Serowbot

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Re: Question about enrichment valve
Reply #8 - 09/23/10 at 11:34:43

longmi01 wrote on 09/23/10 at 11:31:16:

Have you played with the idle mixture screw? This summer, I was having to do the idle speed adjustment on a daily basis before and after the bike was warmed up. I finally just turned my mixture screw out a full turn, and that made everything much more stable through warm-up.

I'm just thinking your bike is fuel starved at idle, and that's why you're having to open the butterfly to let the engine start sucking through the needle jet.

+1,.. maybe so,..good thinking... Wink

...

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