SuzukiSavage.com - Air Cut Off Valve?

650-rider Junior Member Offline Posts: 52 Gender:	Air Cut Off Valve? 06/02/05 at 12:50:08 Hello everyone - I have a question. I was surfing on eBay for Suzuki Savage items and I saw "SUZUKI LS650 SAVAGE AIR CUT OFF VALVE". Does anyone know what this is for, and if it is a standard item or an accesory? The description says that it will "enrichen the mixture when the throttle is closed stopping backfiring..". Thanks.
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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Air Cut Off Valve? Reply #1 - 06/02/05 at 13:06:23 That's the little diaphram that goes under the plate on the right hand side of the carb
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Savage_Rob Serious Thumper Alliance Member Offline Mechanically Inclined Amateur Posts: 6972 Texas (Dallas area) Gender:	Re: Air Cut Off Valve? Reply #2 - 06/02/05 at 14:00:21 Don't bother. I bought one and can't tell the difference between it and the stock one on my bike with a magnifying glass and a bright light.
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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Air Cut Off Valve? Reply #3 - 06/02/05 at 15:05:19 Was it s'pose to be better - looks like there are 3 or 4 numbers depending on the year
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bobo383 Serious Thumper 2004 No Login Offline Neck=Red Posts: 516 Arlington, TX Gender:	Re: Air Cut Off Valve? Reply #4 - 06/02/05 at 15:18:41 You only need it if the one in your carb is torn or broken. It's held in place by the round plate to the left of the idle mixture screw. Careful taking it out, there's a spring behind it.
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Savage_Rob

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Re: Air Cut Off Valve?
Reply #5 - 06/02/05 at 15:37:29

Reelthing wrote on 12/31/69 at 16:00:06:

Was it s'pose to be better - looks like there are 3 or 4 numbers depending on the year

It was just the claim that it reduces or stops backfiring that made me wonder whether it was "improved" in any way. I don't remember the price but I think it was around $10 or $12, so I ordered one to see. It was identical to the one in my '98.

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Reelthing Serious Thumper Alliance Member Offline Fish or ride that is the question Posts: 5397 Houston,Tx Gender:	Re: Air Cut Off Valve? Reply #6 - 06/02/05 at 16:32:25 Well you got a deal on a spare -looks like ron ayers is like 35 bucks
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slavy

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Re: Air Cut Off Valve?
Reply #7 - 06/05/05 at 08:02:02

What it does is - it closes the idle mixture AIR passage, so it enrichens the idle mixture when You decelerate.
In normal conditions the spring keeps the diaphragm and the plunger in a position so the air passage stays open. If You decelerate with the trottle closed You create a very strong vacuum that pulls on the diaphragm , overcomes the spring ,and the plunger closes the air for the idle circuit .

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Savage_Greg

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Re: Air Cut Off Valve?
Reply #8 - 06/05/05 at 08:34:38

slavy wrote on 12/31/69 at 16:00:06:

What it does is - it closes the idle mixture AIR passage, so it enrichens the idle mixture when You decelerate.
In normal conditions the spring keeps the diaphragm and the plunger in a position so the air passage stays open. If You decelerate with the trottle closed You create a very strong vacuum that pulls on the diaphragm , overcomes the spring ,and the plunger closes the air for the idle circuit .

And then when you richen the idle screw mixture, all the popping should be gone, right?

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