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  1. #1

    Join Date
    Sep 2009
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    carb rebuild - Extra O-Rings?

    Rebuilding the carbs on my 94 sl650. The kit I have is for the 38's & 44's. Looks like there are 6 extra o-rings, all the same size.

    pg 3.68 of manual says:

    3. Replace inlet screen. Remove the chamber O-Ring and inspect.

    Which O-Ring are they refering to? I couldn't see any small one, only the large one for the housing.

    First picture is the large housing o-ring

    2nd is the 6 extra o-rings.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2

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    Think I figured it out.

    Would those be the o-rings for the high & low mixture screws?

    If so, should I bother to replace them?


    My no fuel problem looks like it was cause of very dirty carbs. The needles in front & rear were so dirty they were stuck in the housings.

    All in all I did run into a few issues with 2 screws that would absolutly not come out and ended up stripping them. Ended up not being able to replace the gasket where the jets are cause of this. Hope this isn't another problem later though. If so I'll have a ship get them out for me.

  3. #3
    dghal's Avatar
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    If you can change them out do it,, the old o-rings might be dry or even cracked...




    Quote Originally Posted by stl_sl650 View Post
    Think I figured it out.

    Would those be the o-rings for the high & low mixture screws?

    If so, should I bother to replace them?


    My no fuel problem looks like it was cause of very dirty carbs. The needles in front & rear were so dirty they were stuck in the housings.

    All in all I did run into a few issues with 2 screws that would absolutly not come out and ended up stripping them. Ended up not being able to replace the gasket where the jets are cause of this. Hope this isn't another problem later though. If so I'll have a ship get them out for me.

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Yes, those are for the adj screws. Install the new ones for sure. Pay close attention, as I believe they are actually 2 different sizes.

    The gasket/seal under the jet block normally isn't a problem. BUT, if the needles were stuck from debris, I'd want to inspect the jets too. Very tiny orifices that can be clogged.

    Drill the heads off the screws, and use vice grips to extract the remaining screw left over. Or use an easy out to remove them.

    FYI: an impact screwdriver works well on those screws. It's not uncommon for most first timers to strip 1 or 2. Pretty sure they Loctite them in from the factory.

  5. #5

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    They didn't have locktite on them. From the one that I was able to do completely the jets were perfectly clear and that one was the most gummed up on the needle compared to the other 3.

    Assumption is a horrible thing, I know. Taking a chance with the other 2 being the same. Will know in an hour.

  6. #6
    mr. happyfunbear tenjuna's Avatar
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    the mikuni kits I purchased had a ton of leftover parts...it could be a generic kit?

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by tenjuna View Post
    the mikuni kits I purchased had a ton of leftover parts...it could be a generic kit?
    Those left over parts are for the 44mm carbs, or older model 38'3/44's.

  8. #8

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    Well guess what?

    IT RUNS!!!!!!!

    Heading to the lake in a few to give it a run. Loaded up with all the tools if needed.

    Thanks all!

  9. #9
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    Saweet!!!

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    They usually do. I saw a fuji running on 1 cyl at the gathering. Much to my surprise!

    Good luck....

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