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  1. #1
    Water Bum Rodneyae's Avatar
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    PRO 785 cdi....97 vs the newer ones?

    I remember hearing the 97 was better for the 750/780's vs the newer cdi's. I am just courious why this is.

    r


  2. #2
    Connecticut CrazyA's Avatar
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    I believe the '97's had a "hotter" timing curve straight from the factory than the others.

  3. #3
    Watcon's Avatar
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    Timing curves

    The 1997 CDI had "less" initial timing than the 98 & newer CDI.. Both of them will work, but the 97 is a little safer in the 750/780 motors.

  4. #4
    Water Bum Rodneyae's Avatar
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    Thanks, Randy

    I will be calling you in the next week or three for some parts for my project.


    Rodney

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by Watcon View Post
    The 1997 CDI had "less" initial timing than the 98 & newer CDI.. Both of them will work, but the 97 is a little safer in the 750/780 motors.
    You probably don't know about my project I'm working on, but it's a 780 with PSI cylinders that have exhaust valves. Should I be on the hunt for a 98 or newer CDI or stay with the 97? Thanks for the input Randy.

  6. #6
    Connecticut CrazyA's Avatar
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    Quote Originally Posted by Watcon View Post
    The 1997 CDI had "less" initial timing than the 98 & newer CDI..
    Awesome... now we know!! How about the rest of the curve Randy, after initial?

  7. #7
    SeaLion's Avatar
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    Quote Originally Posted by Watcon View Post
    The 1997 CDI had "less" initial timing than the 98 & newer CDI.. Both of them will work, but the 97 is a little safer in the 750/780 motors.
    That's what I thought too. I wish I knew which one I put in mine. I got it from Travis who got it from you back in the day.

  8. #8
    Watcon's Avatar
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    785 timing

    The 1997 timing curve is exactly the same as the 1998, except it had 34 degrees intial instead of 36 degrees. The big difference was in the "exhaust valve" ramp configuration, and it make a huge difference if you are using it to control the OEM cable operated exhaust valves.

    If you have a 1997 785 Pro, buy a Z98 CDI, and sell your 97 model to a 750/780 guy.

    I still talk to Travis..He's a smart guy, and a good friend..



    Randy

  9. #9
    SeaLion's Avatar
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    Travis helped me some with the set up originally on my 780. I bought his square SJ a few years ago. It hauls butt.

  10. #10
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by Watcon View Post
    The 1997 timing curve is exactly the same as the 1998, except it had 34 degrees intial instead of 36 degrees. The big difference was in the "exhaust valve" ramp configuration, and it make a huge difference if you are using it to control the OEM cable operated exhaust valves.



    Randy
    I wonder if there'll be a noticeable difference with gas operated valves?

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