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Help 92 gsf250 head gasket?

Discussion in 'Suzuki 250cc In-line 4's' started by Tonywilliams845, Mar 8, 2021.

  1. Tonywilliams845

    Tonywilliams845 Member

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    Hey guys, just became a member, I have a 92 jdm gsf250 bandit, the bike is suffering low compression (lowest cylinder was at 30 pound) a piston kit and honing/boring is easy said and done, however I have scowered online marketplaces for a head gasket to fit the thing, I cant find any useful information and was wondering if anyone was having similar issues and knew if other aus delivered models carried the same gasket that I could use as part of my top end rebuild?? Can I have some help???
     
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Try this part number: 11141-06C01

    Do you know if it is the model with variable valve lift? If so it will be GSF250V model. Australian delivered model GSF250VY for year 2000, diagrams and service manual in the resources section (premium membership needed).

    Have you checked the valve clearances? A good idea before tearing it apart.
     
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  3. Tonywilliams845

    Tonywilliams845 Member

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    Thanks, no I haven't checked valve clearances, and it still has the jap plate on it for 1992, ill check the part no out and see where it takes me otherwise I might have to get one made special
     
  4. gregt

    gregt Well-Known Member Premium Member

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    If it's the same as other engines in this family, the gasket is metal shim. I've reused them quite satisfactorily.
    Clean them off to bare metal and repaint with suitable high temp paint before reuse.

    There are a lot of other reasons possible for your low compression.
     
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  5. Tonywilliams845

    Tonywilliams845 Member

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    Thanks everyone for all your assistance
     
  6. DannoXYZ

    DannoXYZ Well-Known Member

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    I've successfully used copper-coat sprays for Cometic multi-layer steel or high-boost copper headgaskets.

    https://www.crcindustries.com/products/copper-coat-174-aerosol-9-wt-oz-401612.html

    Did you try wet compress-test as well? Any difference?
     
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  7. Tonywilliams845

    Tonywilliams845 Member

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  8. Tonywilliams845

    Tonywilliams845 Member

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    But thanks, I can get a piston kit for around 100 bucks and get some valve stem seals to fit, the head gasket was the only main issue, but it seems a top end rebuild is going to be fairly easy now, as long as I don't have to crack the crank case open I should be sweet, integrated gearboxes are the worst
     
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  9. DannoXYZ

    DannoXYZ Well-Known Member

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    Sounds like you've narrowed it down to piston & ring rebuild. Being able to re-use headgasket simplifies things. Good luck!
     
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  10. Hobeutsss

    Hobeutsss Active Member

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    Hello!
    I'm currently rebuilding engine myself and I was wondering nr.1 where did you bought valve stem seals? nr.2 did the copper-coat worked for the head gasket? And the last one , maybe someone could tell me if it's possible just to buy whole cylinder for suzuki GSF250 GJ74A, I saw that they are available in https://en.impex-jp.com/, however almost every time when I try to order from them , specific engine parts are discontinued.
     
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  11. thebeefsalad

    thebeefsalad Well-Known Member

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    VVL on a 250
    Variable intake on a 400
    Suzuki seems to like testing in production
     
  12. Zippy

    Zippy Active Member

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    To pick up on the point about re-using a head gasket...

    Are we saying that removing what's left of the previous coating and cleaning up the gasket would allow something like this to be re-used?

    gasket1.jpg

    gasket2.jpg

    Any links to some tried and tested products to re-coat such a gasket with would be appreciated!
     
  13. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    A group of my Hungarian customers contacted me about head gaskets very recently and I put them on to John at Gaskets-to-Go in Bangkok. https://gasketstogo.com/ I expect he will be making them shortly so get in touch with him if you want one.
     
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  14. Zoltan Novak

    Zoltan Novak Member Premium Member

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    Do you have some headgasket for sale?
     
  15. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    The customers never went ahead with an order from Gaskets-To-Go. There is a Russian company that makes them also but good luck trying to buy those.
     
  16. thebeefsalad

    thebeefsalad Well-Known Member

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    just do what Millyard does. Punch it out of copper, and reduce the compression ratio to "well, that could have been fast":1
     
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  17. amct77

    amct77 the one that got away......

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    there are ones available on the japanese yahoo site.
    not genuine but the seller have been making and selling them for a long time.
    you can use buyee or other sites to buy and send to aus.
     
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  18. amct77

    amct77 the one that got away......

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    How did you go with getting your head gasket sorted.
    Yahoo Japan are selling a better aftermarket gasket now for $44aud minus postage.
    I have four complete gasket sets for the gj74a coming in about two months (worst case scenario for postage time).
     
  19. Hobeutsss

    Hobeutsss Active Member

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    Hey, I did buy the head gasket from GJ77A and cut it in specific way so that it fits the head. So far it has worked perfectly - with this I mean I haven't had any leaks. I guess I would be partially interested into your head gasket, however I hope I will not have to take apart the engine in at least few years. There were 2 things which I did partially wrong, which is since I couldn't find OEM oversized pistons ( I found one site had 3...) I install the regular OEM pistons and I couldn't find new OEM cylinder so I went with the old one. Both of these things I assume you don't have available?
     
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  20. Hobeutsss

    Hobeutsss Active Member

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    Pictures how the gasket looked like. In my opinion not too bad.
     

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