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  1. #1

    What should stock compression be on stock 93' waveblaster?

    looking to buy a stock ski with 150 psi in each hole. What is 'normal' for that motor?


  2. #2
    93 is probably 120-125. those are 650's 150 psi would be a 700

  3. #3
    Why do you say they are 650's? I thought the WB1 only ever came with the 701?

  4. #4
    Hot_Water's Avatar
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    NADA shows the 1993 WaveBlaster as being a 701cc engine. > http://www.nadaguides.com/Boats/1993/Yamaha

    Clymer Yamaha Shop Manual says;
    WR500, WRA650, WRA650A, SJ650, 1995 WRB650, WRB650A engines @ 142psi.
    WR650 engine @ 119 psi.
    All other models @ 134psi.
    Last edited by Hot_Water; 09-23-2014 at 09:50 AM.

  5. #5
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    150psi is usually what I see on a 650-760 Yamaha.

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