650 and 750 flywheel question

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  1. #1
    PWCToday Regular tiderider's Avatar
    Join Date
    Oct 2007
    Largo, FL

    650 and 750 flywheel question

    I tried searching but can稚 find it. I知 throwing a small pin from a 92 750ss into my 650. Planning on modding the cases for the 650 flywheel and was thinking about getting it lightened but seems like a lot of people around here have had failures from lightening OE flywheels. Does anyone know the weight difference between the OEM 650sx flywheel and the 750? If it痴 a big enough improvement to just use the 650 flywheel, I probably won稚 mess with it. I don稚 really want to drop the money for an aftermarket one. (Don稚 worry, if no one knows, I値l weigh both of mine and post when I finally get around to it)
    I知 into stand up jet skis, I have a dad bod, and a 350 credit score, but that痴 only because I hate gold diggers.

  2. #2
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
    Join Date
    Aug 2006

    Re: 650 and 750 flywheel question

    Stock = 72oz.
    Lightened = 64oz.
    Magnets removed = 58oz.
    Magnets removed and lightened = 43oz.

    There is nothing "wrong" with 650 ignitions, in fact they have almost the same curve as small pin 750 ignitions. 1995 and newer ignitions have a more aggressive curve and have a little better midrange and upper midrange performance.
    Quoted from MCN6

    Weight on a stock 650SX-X2 flywheel is 3lbs 12oz
    Last edited by WFO Speedracer; 11-12-2018 at 09:46 AM.
    Y'all know me, still the same O.G. but I been low-key
    hated on by most these &^$$@s with no cheese, no deals and no G's, no wheels and no keys, no boats, no snowmobiles, and no skis, mad at me cause I can finally afford to provide my family with groceries

    I was 300SXing when 300SXing wasn't cool !

  3. #3
    PWCToday Newbie
    Join Date
    Feb 2018
    San Diego

    Re: 650 and 750 flywheel question

    i swapped a small pin 750 into my 650sx last summer, the 650 flywheel is lighter than the 750, and i have my oe one lightened from one of the guys on these forums. it is well worth the time to mod the case to fit the 650 flywheel! and while youre at it advance the timing a bit!
    Last edited by Jeffpizzella; 12-04-2018 at 11:13 PM.

  4. #4
    PWCToday Guru 92Kawasaki750SS's Avatar
    Join Date
    Jul 2015
    United States

    Re: 650 and 750 flywheel question

    I also modded my 750sp for 650 flywheel. My 650 flywheel was lightened by New Miller, great upgrade for the 750. I've been riding all season with no issues.

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