650 and 750 flywheel question
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  1. #1
    PWCToday Regular tiderider's Avatar
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    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)
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  2. #2
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
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    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
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  3. #3
    PWCToday Newbie
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    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!
    20180826_200112.jpg
    Last edited by Jeffpizzella; 12-05-2018 at 12:13 AM.

  4. #4
    PWCToday Guru 92Kawasaki750SS's Avatar
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    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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