SuzukiSavage.com - That plug covering the mixture screw...( on carb)

old_rider Serious Thumper Offline Backyard Bill Productions Posts: 3147 flordia panhandle Gender:	Re: That plug covering the mixture screw...( on ca Reply #15 - 12/08/13 at 12:31:43 My thoughts are , why would they slot the plug??? it doesn't screw out, it has no threads. If it were an OEM screw, it wouldn't even be seated in that position and would be leaking fuel from the threads. Might be they could not find an OEM one at the time and to get buy used an off brand.
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oldNslow

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Re: That plug covering the mixture screw...( on ca
Reply #16 - 12/08/13 at 14:10:19

I've seen small, screwdriver slotted, brass pipe plugs that look a lot the what's in your photo. Can you see any threads on the bit of plug that is sticking out ? The bore that the plug is pressed into is not threaded so if that's what it is I've got no idea why someone would put one in there.

If your bike runs ok right now think carefully about your next move. Replacement carbs are fairly expensive.

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Bluesman

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Re: That plug covering the mixture screw...( on ca
Reply #17 - 12/11/13 at 03:33:11

So far, I decided to leave this one alone. I have noticed differences between US carbs and EU carbs in another aspect - the float bowl drain is different - so I keep thinking the EU Savages came here with maybe a fixed ratio thingy that was pressed/glued in place to satisfy EU regulations. Until I hear from someone with a EU bike who took the step and drilled it...I´m leaving it. The mixture looks reasonable anyway, judging by the plug color.

BTW...I have now seen TWO carbs, with the slot in the slotted "plug" in exactly the same position..

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Cheers /Richard

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18096 Camp Springs, Kentucky Gender:	Re: That plug covering the mixture screw...( on ca Reply #18 - 12/11/13 at 04:19:24 You might be onto something. Maybe they did adjust the carbs and epoxy the screw in place? It does look like maybe there is a little bit of grey goo around that screw.
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Bluesman Full Member Offline Jack of many trades Posts: 108 Malmö, Sweden Gender:	Re: That plug covering the mixture screw...( on ca Reply #19 - 12/11/13 at 04:45:13 Yep, I´ll have a closer look at the second carb (a -97, and much cleaner) with a loupe/magnifying glass later today to check for glue traces.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: That plug covering the mixture screw...( on ca Reply #20 - 12/11/13 at 07:50:38 Bluesman wrote on 12/11/13 at 03:33:11: I have noticed differences between US carbs and EU carbs in another aspect - the float bowl drain is different I have 2 bikes, 1 has the drain the other doesn't.
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Bluesman Full Member Offline Jack of many trades Posts: 108 Malmö, Sweden Gender:	Re: That plug covering the mixture screw...( on ca Reply #21 - 12/11/13 at 14:42:20 The ones I have seen (EU) have a downward 10mm hex bolt only. No sideways screw and separate drain outlet. This makes me think Eu carbs are different. That makes me cautious about the US drillable plug vs possible EU fixed mixture glued plug issue.
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S-P Serious Thumper Offline Back in the saddle again Posts: 816 Phoenix, AZ Gender:	Re: That plug covering the mixture screw...( on ca Reply #22 - 12/11/13 at 16:11:04 That would make sense if they didn't have to meet the California emissions standards. The carbs could be different.
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Steve H

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Re: That plug covering the mixture screw...( on ca
Reply #23 - 12/11/13 at 16:32:16

My 87 didn't have a plug over the mixture screw when I got it. I can't say if the PO took it out or there wasn't one. Many engines from the 80's other than cars didn't have plugs over the adjusters.

Now, they just cut the jet to the exact size it needs to run "right" and put it in on most things. There's not even a screw or cover.

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87 LS650, 2005 Ninja 250, 2009 Yamaha C3, 2001 Honda Reflex. On 2 wheels since 6/80.

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Dave

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Re: That plug covering the mixture screw...( on ca
Reply #24 - 12/12/13 at 03:26:48

Steve H wrote on 12/11/13 at 16:32:16:

Now, they just cut the jet to the exact size it needs to run "right" and put it in on most things. There's not even a screw or cover.

That has been going on in the small engine business for many years. Carbs with no adjustments - the jets are built right into the carb and they take their best stab at jetting them to fit all elevations. It sure can make for some bad running engines. A fellow in this building bought a pair of the little Doodle Bug minibikes for his sons. He brought them to me to look over as one did not run well. I spent a long time working on the bad running one - they have Chinese engines on them and no carb adjustments. I never could get the problematic one to run right. I believe the carb was just too lean. I tried raising the fuel level in the carb by adjusting the float and it ran a tad better - but never as good as the other bike. If the carb had an adjustement screw....it would have been easy-peasy!

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swedishbiker Full Member Offline SuzukiSavage.com Rocks! Posts: 119 Växjö Sweden Gender:	Re: That plug covering the mixture screw...( on ca Reply #25 - 12/12/13 at 05:27:59 My 1993 Savage carb looks same as in the picture.
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old_rider Serious Thumper Offline Backyard Bill Productions Posts: 3147 flordia panhandle Gender:	Re: That plug covering the mixture screw...( on ca Reply #26 - 12/12/13 at 06:15:42 Took a pic of the wife's, best I could with the cell phone... see how the jet is a ways back inside? Well, when I find another savage around here I'll take a snap of the carb on it...
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Steddy58

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Re: That plug covering the mixture screw...( on ca
Reply #27 - 12/12/13 at 06:38:28

Hi, I'm in the UK and the mixture screw on mine looks like the one on Bluesmans carb, the one on old riders looks like it may have had the plug taken out. As Dave pointed out there does seem to be something like a glue residue around the screw and in the slot,perhaps someone did alter it to achieve the correct emissions and then epoxied it over, speaking from experience if its running ok leave well alone,or you'll end up like mine ( in bits in me mams garage)

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1988 sav, mikuni vm36 carb (lancer),high comp piston, racing cam, raptor petcock, self-made exhaust, delkevic silencer (ryca header), K&N air filter, 48,000 miles

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Bluesman Full Member Offline Jack of many trades Posts: 108 Malmö, Sweden Gender:	Re: That plug covering the mixture screw...( on ca Reply #28 - 12/12/13 at 15:34:25 Well, looks like the "remove the plug and adjust away" tip is not universal after all. Good thing we noticed the differences. I´m going to contact a scrapper to see if I can get a cheapo EU Savage carb to dissect. Until then - beware.
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