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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Carb /cgi-bin/YaBB.pl?num=1310316971 Message started by village idiot on 07/10/11 at 09:56:11 |
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Title: Carb Post by village idiot on 07/10/11 at 09:56:11 I have an 86 Savage that I had to replace the air box and cleaner and rebuild the carb. I start the adjust ment at 1 1/2 turns out. I go in 1/4 turn increments and cannot find the right adjustment. It idles ok and even runs ok at very low rpm. No matter what I do, I can't get it to run correctly. Any ideas? I'm about ready to sell this thing. |
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Title: Re: Carb Post by jdeluca on 07/10/11 at 10:02:04 Define the following: Quote:
How is it not running correctly? |
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Title: Re: Carb Post by village idiot on 07/10/11 at 10:05:26 I have turned the adjustment screw all the way in then backed out 1/4 turn at a time. When I road test, it spits and sputters upon acceleration. Each adjustment changes a little, but I cannot get the thing to accelerate smoothly. |
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Title: Re: Carb Post by jdeluca on 07/10/11 at 10:28:14 Clogged passage in your carb somewhere....double check your needle valve. I'd try putting a couple ounces (NOT a whole bottle) in a tank of gas and try running it at an idle for a few minutes and then giving it a slow acceleration in neutral just to get the seafoam moving. Alternatively, pull the carb off again and boil it after stripping it down to just metal parts...boil in water with some lemon juice. Will get the carb sparkling inside and out! |
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Title: Re: Carb Post by jdeluca on 07/10/11 at 10:28:45 As an addendum, that screw won't affect acceleration, it's an idle mixture screw... |
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Title: Re: Carb Post by Serowbot on 07/10/11 at 10:29:13 Then maybe it ain't the idle adjustment... the idle is doing very little when you're accelerating... What jets do you have?... What mods?... What elevation are you?... Have you tested your petcock?... Sounds like you may need a smaller pilot jet... PS ... don't set your idle speed too low,... you'll cook your cam bearings... |
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Title: Re: Carb Post by verslagen1 on 07/10/11 at 11:09:34 4C4A59474242474F435D2E0 wrote:
Up until this point, I think you're ok, but being able to turn the idle mixture screw in all the way either says you have too large of a idle jet or your idle speed is too high. Quote:
Quote:
a little too rough of an adjustment for fine tuning use 1/8 turns Quote:
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Title: Re: Carb Post by village idiot on 07/10/11 at 14:24:33 I removed the white spacer and installed 2 washers about 1/2 as thick. The airbox when I bought it was an automotive radiator hose with a K&N type filter attached. I replaced with an OEM airbox and filter. It supposedly had been jetted so I rebuilt the carb with an oem kit. I can get the jet #s if needed. So if I am reading this correctly, I have been chasing my tail and may need to replace the white spacer. agressively clean the carb body and possibly replace some jets...again. Also, I'm at roughly 1000 feet elevation. Can anyone tell me what jets I need? I can compare to what I was sent in the kit. |
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Title: Re: Carb Post by Gyrobob on 07/10/11 at 15:51:23 4C4A59474242474F435D2E0 wrote:
Have you verified the transient enrichment valve is working properly? |
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Title: Re: Carb Post by verslagen1 on 07/10/11 at 16:00:51 5157445A5F5F5A525E40330 wrote:
If you have the stock muffler, a 150 would be a good starting point and a stock pilot jet for your year is a 47.5 You got a OEM kit? don't know that they made one. |
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Title: Re: Carb Post by village idiot on 07/10/11 at 16:32:29 First off, I want to thank everyone helping out here. You don't know how much that means. Now, I mis-spoak. I should have said an OEM spec kit. It's a keyster brand carb kit.came with #130 main jet and #47.5 pilot jet. Can the needle jet cause my problem? The new one we had to all but press it in. the old one slides in with minimal pressure. Should I just use the old one? Also, how do you test the Transient enrichment valve. |
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Title: Re: Carb Post by verslagen1 on 07/10/11 at 16:45:50 I think the keyster kit's use mikuni sizes, so 130 is way too small, unless you're in europe. 8-) I'd use the old needle jet. haven't got a clue. (gyrobob you're up, the world awaits your answer) |
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Title: Re: Carb Post by village idiot on 07/10/11 at 16:57:10 I will give all this advice a try and hopefully all will turn out great. Thanks so much. |
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Title: Re: Carb Post by jdeluca on 07/10/11 at 19:45:03 The needle jet should have a number stamped on the side of it. Stock main jet is much much bigger than a 130... http://suzukisavage.com/cgi-bin/YaBB.pl?num=1098869040 That link above is to the stock specs for the Mikuni carbs, the stock carbs on our Thumpers. The TEV (Transient Enrichment Valve) is the little cover on the side held on with 3 tough screws to get out if they haven't been removed yet. There's a spring and a rubber diaphragm in there, that spring likes to escape when pulling the cover off, so use caution... :) Pull that cover off and verify that it's clean and there's no tears in the diaphragm. But after hearing you have a 130 Main Jet, I bet that if you go up to a 145 or a 150 you'll notice an appreciable difference... |
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Title: Re: Carb Post by Routy on 07/10/11 at 21:15:59 I can't believe all the carbs that are cleaned here, that never solves the problem. Does anyone ever use compressed air to blow out a carb when cleaning it ? I never see it mentioned. If you are attempting to clean a carb w/o access to compressed air, its like.....peeing upwind ! It will come back and get you ! |
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Title: Re: Carb Post by justin_o_guy2 on 07/11/11 at 01:39:43 Berrymans will get ya thru it, spendy, but cheaper than a compressor. Eye protection is a given, compressor or not. |
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Title: Re: Carb Post by Gyrobob on 07/11/11 at 05:04:27 646B716A76706361696770020 wrote:
Routy's correct about that! It's as futile as cleaning a carb properly and then reinstalling it without a pleated paper gas filter. What's the point of cleaning it if you're just going to dump dirt in it again? |
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Title: Re: Carb Post by verslagen1 on 07/17/11 at 07:57:39 5D6368757875781A0 wrote:
Have you verified the transient enrichment valve is working properly?[/quote] How do you do that? |
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Title: Re: Carb Post by Gyrobob on 07/17/11 at 11:40:33 Have you verified the transient enrichment valve is working properly? Verslagen says, "How do you do that?" Well, with the lack of test equipment most of us are subject to, I'll admit we can't actually test for valve actuation, and for the mixture enrichment that is supposed to happen at high rpm and closed throttle. What we mortals can do, though, is to clean the carb thoroughly, with a good soaking, moving soft thin wire through the tiny holes, and blowing out everything with compressed air,.. but,... while at this task, noting the integrity of the transient enrichment valve, its chamber, and passages. Both the carbs we rebuilt for the Dual RYCA build had muck in the transient enrichment valve areas, and almost certainly weren't moving freely enough to work properly. If we still get some backfiring after we get these things on the road, we will consider the spring mod for this valve to increase its effectiveness. So, overall, you got me. We don't have any way to observe whether or not the valve is actually moving, let alone enrichening properly. I guess the point of my question was to make the poster think about it, and at least clean it out. Whew. |
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Title: Re: Carb Post by verslagen1 on 07/17/11 at 12:45:15 I knew that. ;D |
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Title: Re: Carb Post by Gyrobob on 07/17/11 at 13:47:56 574453524D4046444F10210 wrote:
Got me again, eh? ::) |
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