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  1. #1

    Join Date
    Jun 2002
    Albuquerque, NM
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    YS 120SF crankshaft questions

    I have a 120SF or so I think I do. I crashed the plane it was in causing a bent crankshaft. A member of my club gave me a spare crank shaft he had laying around. I disassembled the engine and tried to install the used crank only to find the engine had new style bearings, while the crank from my friend was an original 120SF that took the old 17mm rear bearing. I bought the engine used so I assumed the previous own knew what he was selling. The engine ran beautifully before crash. This engine has the large mushroom drive washer which came on only the SF and AC. I am wondering if YS crankshafts are somswhat interchangable. What crankshaft was in this engine? I unfortunately thru the old one away before I received the new one.

  2. #2

    RE: YS 120SF crankshaft questions

    Give Richard a call at YS Performance, he will know for sure.

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