SuzukiSavage.com - Carb valve stuck or normal?

Niallmac YaBB Newbies Offline Posts: 25 UK	Carb valve stuck or normal? 06/24/22 at 02:21:27 hi My LS 650 1994 won’t start after a break of about 8months. It Turns over There is spark Spark plug is dry There is fuel to carb from tank I’ve removed the air filter and tried to lift the throttle valve. It only moves about 5mm. It doesn’t move when the throttle is twisted. Should it? Cheers Niall
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Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2629 Amongst the Twisty Roads	Re: Carb valve stuck or normal? Reply #1 - 06/24/22 at 03:53:08 Remove the carb and clean it. I don’t know your method for lifting the slide, but it should easily move. You’ll discover it’s condition when you clean the carb. If the slide has corrosion, it will need to be replaced. Or maybe you bent the needle trying you lift the slide with too much side force.
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Niallmac YaBB Newbies Offline Posts: 25 UK	Re: Carb valve stuck or normal? Reply #2 - 06/24/22 at 04:00:18 Thanks Gary I’ve ordered a rebuild kit but was just wondering while I wait before stripping the carb. Im just lifting with my finger through the inlet. No pressure applied. Anyway, from what you say, she should move so I’ll wait until I get into it.
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Re: Carb valve stuck or normal?
Reply #3 - 06/24/22 at 06:54:14

Niallmac wrote on 06/24/22 at 02:21:27:

My LS 650 1994 won’t start after a break of about 8months.

I’ve removed the air filter and tried to lift the throttle valve. It only moves about 5mm. It doesn’t move when the throttle is twisted. Should it?

The slide does not move when the throttle is twisted, it responses to air flow.
When the throttle is twisted, a butterfly valve moves.

A stuck slide will not keep it from starting, it just won't go anywhere.

Some countries have a spacer above the slide for learners to limit slide travel.

Your carb is probably gummed up from sitting. Clean it.

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Niallmac YaBB Newbies Offline Posts: 25 UK	Re: Carb valve stuck or normal? Reply #4 - 06/24/22 at 08:49:24 I’ve started cleaning (float was definitely sticking too). Out of interest, how much movement would you expect in the slider? 10mm? 5?
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28787 L.A. California Gender:	Re: Carb valve stuck or normal? Reply #5 - 06/24/22 at 08:58:10 Niallmac wrote on 06/24/22 at 08:49:24: I’ve started cleaning (float was definitely sticking too). Out of interest, how much movement would you expect in the slider? 10mm? 5? by your finger, it will move the entire opening.
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Niallmac YaBB Newbies Offline Posts: 25 UK	Re: Carb valve stuck or normal? Reply #6 - 06/24/22 at 09:20:22 Ok thanks. It moves about 5-10mm. I’ll start looking there then
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Niallmac YaBB Newbies Offline Posts: 25 UK	Re: Carb valve stuck or normal? Reply #7 - 06/24/22 at 09:45:04 Short video showing full movement. https://flic.kr/p/2nu5TFa
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Carb valve stuck or normal? Reply #8 - 06/24/22 at 09:47:04 I'm sold on using a whiff of ether on starting anything that has been sitting. Saves the battery and starter motor and helps troubleshooting.
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Niallmac

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Re: Carb valve stuck or normal?
Reply #9 - 06/24/22 at 10:14:11

Niallmac wrote on 06/24/22 at 09:45:04:

Short video showing full movement.

https://flic.kr/p/2nu5TFa

Success! It’s freed up. Possibly from leaving for the carb cleaner to get there.

The needle has a 3mm wide circle of a glue like film that stopped it lifting. A bit more cleaning and she should start.

Thanks for all your help!

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Niallmac YaBB Newbies Offline Posts: 25 UK	Re: Carb valve stuck or normal? Reply #10 - 06/25/22 at 09:08:54 Next step I’m afraid. After cleaning, it turns out that the float bowl is not filling at all. I’ve removed the floats and the pin in the picture moves as expected. I’ve also blown compressed air down inlet. Do I need to remove the piece arrowed? If so, how does it come out please?
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28787 L.A. California Gender:	Re: Carb valve stuck or normal? Reply #11 - 06/25/22 at 09:33:55 it just pulls out. held in by o-ring
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Niallmac YaBB Newbies Offline Posts: 25 UK	Re: Carb valve stuck or normal? Reply #12 - 06/25/22 at 10:06:48 🤔
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Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2629 Amongst the Twisty Roads	Re: Carb valve stuck or normal? Reply #13 - 06/25/22 at 14:30:17 There’s your problem. That rubber piece should be soft, pliable and pointed. Your looks like 3-strikes, so it’s out. Before you reinstall the new float valve, polish the seat with metal cleaner and a q-tip, and also replace the o-ring.
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Niallmac

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Re: Carb valve stuck or normal?
Reply #14 - 06/25/22 at 14:45:56

Hi Gary

Which rubber piece do you mean? The gauze end with the white plastic? That plastic was inside and I pulled it out to get to the gunge.

I ordered a repair kit last week as I knew I’d need a gasket at least. It looks like it comes with a valve and seat. However it looks very different to what I’ve just removed:

https://www.ebay.co.uk/itm/313469328804?mkcid=16&mkevt=1&mkrid=711-127632-235...

Will that be ok do you think? It’s supposed to be for all LS650s

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