650sx crank/case question
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  1. #1
    PWCToday Newbie
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    650sx crank/case question

    Tearing into this motor, I don't think it's ever been apart. Some hitting in the cases where the bearings sit not sure if that much matters. The dowel pin that sits in the center case and the center ring on the crank is pretty sloppy as well if that's any concern? Also slight noise out of two of the bearings in the crank, the one I point to and the one on the coupler end is very slight. Into it this far I might just send it down for a rebuild as well.
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  2. #2
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: 650sx crank/case question

    Any noise, you need to rebuild crank.
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
    email watcon@watcon.com

    Please visit our web site

    new parts / products / services www.watcon.com
    thank you

    Please check out and like WATCON on Facebook

  3. #3
    PWCToday Newbie
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    Re: 650sx crank/case question

    Yeah that's kinda what I figured. I'll be getting an order together with you too John, I'll need some stuff over the winter here

  4. #4
    Resident Guru sportsfreak29's Avatar
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    Re: 650sx crank/case question

    Send it to Competitive Crankshafts’s in Idaho.
    If you're not crashing, then you're not trying!!!

    '90 650sx, full mod with all the bells and whistles.
    '84 JS550/650 pump swap with PJS Viper engine.
    '93 550sx with a 650sx motor and Rhass pump kit.
    '81 JS440, full mod 550 PP motor. '
    '93 300sx/750 SP BOB.

    Special thanks to Chris Newmiller, the guys at Prowatercraft Racing, Rhaas Products, and Mitchell at M&M Marine!

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