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  1. #1

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    SBT rebuilt top ends - how good are the pistons?

    Question on a rebuilt top end kit from SBT for a GP1200 '99. How good are the pistons they use? What would you compare them to (Wiseco, Pro-x, stock Yammi, etc.?)

    Thanks!


  2. #2
    YudLuz2's Avatar
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    SBT pistons should rank last on your list. Its very hard to beat
    oem pistons, next I like Pro-x and then Wiseco. Those cheap WSM
    pistons rank about like the SBT's.

  3. #3
    Pistonwash's Avatar
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  4. #4

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    Quote Originally Posted by Pistonwash View Post
    Yup - 2 times now. Not real happy. Trying to track down the culprit for the problem.

  5. #5
    My son (mohawk man) jeffsntx's Avatar
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    Quote Originally Posted by Byteme View Post
    How good are the pistons they use? What would you compare them to (Wiseco, Pro-x, stock Yammi, etc.?)
    I would compare their pistons to the dump I took this morning.

  6. #6
    HopatcongGPR's Avatar
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    you girls in here better start looking up your skirt to make sure them are balls and not soemthing else up there...

    WHO IN HERE HAS RUN THE SBT PISTONS AND HAD A FAILURE DOCUMENTED FROM A RING LAND FAILURE OR SOMEOTHER STRUCTURAL DEFECT IN THE CASTINGS??????

    I have 40 hours on my XLL with SBT pistons...NO PROBLEMS.

    Another buddy ran them for about the same with no problems.

    I know racers who used them in triple pipe skies because the cost was right and never had a structural failure.

    If your boat is a stock rebuild...the SBT pistons will last as long as the OEM pistons or pro-x...IMHO.

    If you use there top end kit YOU should have the ports cleaned up to match the castings. The 66v cylinders I have seen come from them with HORRIBLE mis-matched ports. I have to spend about 2-3 hours to clean them up before I would install them.

    9 times out of 10 when someone pulls a motor down and says "the piston failed" the underlying cause was something else....jetting, water injestion, crank bearing failure, wrist pin bearing failure, lack of oil (pump failure), injestion of garbage in the hull, etc.

    the easieast thing to do is to blame a manufacturer for the builders mis-diagnosis or failure to take other precations while doing the rebuild OR the owner failing to do proper maintenance.

    seen this time and time again with freinds boats over the past 17 years.
    Last edited by HopatcongGPR; 07-10-2007 at 12:22 PM.

  7. #7
    My son (mohawk man) jeffsntx's Avatar
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    I MIGHT use them in a stock application or something that I was going to sell, but never in a performance application.

  8. #8
    HopatcongGPR's Avatar
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    Quote Originally Posted by jeffsntx View Post
    I MIGHT use them in a stock application or something that I was going to sell, but never in a performance application.
    have you used them and had a documented failure related to a casting failure??????

  9. #9
    HopatcongGPR's Avatar
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    Quote Originally Posted by Byteme View Post
    Yup - 2 times now. Not real happy. Trying to track down the culprit for the problem.

    what failed???????

    did a skirt actually break? wrist pin boss fail? ring pin drop? ring land fail???

  10. #10
    There is no VooDoo like BadVooDoo NeVerMind's Avatar
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    [QUOTE=HopatcongGPR;339445]

    If you use there top end kit YOU should have the ports cleaned up to match the castings. The 66v cylinders I have seen come from them with HORRIBLE mis-matched ports. I have to spend about 2-3 hours to clean them up before I would install them.
    [QUOTE]

    Hop, What do you mean by clean them up and how do you do this?

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