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General Category >> Rubber Side Down! >> Air/fuel Mixture screwed
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Message started by Justinmkantor on 07/19/08 at 14:18:28

Title: Air/fuel Mixture screwed
Post by Justinmkantor on 07/19/08 at 14:18:28

I figure I might be screwed here. I just bought a bike and it looks like many people have adjusted the air/fuel mix screw. Its an 1987 savage in CA. with 12,000. I am trying to adjust the screw to tune it in but the screw only goes to 1.3 turns. I think whoever had the bike last damaged the threads so I cannot unscrew it anymore to tune it up Does this mean I am forever stuck in the lean position until I get a new carb? That made me think of a joke.

Q. What is the difference between a pregnant woman and the air fuel adjustment?

A. You can unscrew the adjustment . . . (usually)

Title: Re: Air/fuel Mixture screwed
Post by Dj12midnit on 07/19/08 at 14:31:33

It is possible that the brass plug was not removed cleanly. causing the screw to get stuck.

Title: Re: Air/fuel Mixture screwed
Post by Keith55 on 07/19/08 at 15:24:01

just had this same problem. I promiss you it will come out,just make it turn. mine is a 87 also. I think its just from being in the same spot for years that makes it feel it won't turn.....

Title: Re: Air/fuel Mixture screwed
Post by justin_o_guy2 on 07/19/08 at 15:30:44

Use a good penetrating oil to soften the thread gunk. Sounds like there may be something in there. Or, maybe someone did goof the threads, but, since the pronblem lies between you & the top thread on the screw, you can see it,

Title: Re: Air/fuel Mixture screwed
Post by drums1 on 07/19/08 at 20:00:37

My '87, with 11,000 miles, suffers from the very same affliction. I am at 1 1/2 turns out and froze up. And the slot in the screw is boogered up, so I can't go in or out. It used to work fine, back when I rebuilt it last summer. I was putzing around one day, screwed it in and started counting as I screwed it out. Got to 1 1/2 and she froze up. I've been running real lean ever since. My exhaust pipe is dark blue, flowing into a shiny golden colour. Some guy was gonna sell me an old carb in peices, but I never heard back from him. It's going in for a new clutch next week--maybe they can free it up.....

Title: Re: Air/fuel Mixture screwed
Post by justin_o_guy2 on 07/20/08 at 00:01:39

You could buy the tools & plenty of beer for the labor you will spend.

Title: Re: Air/fuel Mixture screwed
Post by Justinmkantor on 07/20/08 at 01:20:49

Probably won't need a lot of tools, but beer will be needed of course. The screw now looks like it has an hourglass shape to its head. It looks like I might strip it if I try to hard. Any other suggestions? I don't really want to use a screw extractor (gasp).

Title: Re: Air/fuel Mixture screwed
Post by justin_o_guy2 on 07/20/08 at 04:52:16

The hole the brass plug was stuffed into is cosmetic. It can be ground away with a dremel & access to the screw made better. A slot can be cut into the screw head & try to turn it. If it breaks off, grind away & work on the body of the screw, instead of a wimpy little disk of brass on a skinny stick. You can win this.

Title: Re: Air/fuel Mixture screwed
Post by Keith55 on 07/20/08 at 05:38:45

turn the thing all the way in. spray wd-40 in there ,let stand for a bit.
it will come out.