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  1. #1
    flyboy's Avatar
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    Exclamation SpeedFreaks 1500 cc GPR

    http://www.speedfreeksracing.com/cpgpr1500.html

    is this new, or old, and why did they modify the exhaust?


  2. #2
    I wonder if you could just start off with the 05 + jugs since they are non PV motors.

  3. #3

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    Them jug walls look THIN!!!

  4. #4
    All hail the Chief! fullboogie's Avatar
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    "Second reason is for speeds in search of 80 mph with a single pipe motor."

    Umm - he didn't need 1500 cc's to achieve this. There's several 1300 cc skis hitting 80.

  5. #5
    xyzyx00's Avatar
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    Quote Originally Posted by flyboy1300 View Post
    and why did they modify the exhaust?
    im curious as well...

  6. #6
    JetSkiDaddy's Avatar
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    Quote Originally Posted by RXPkiller View Post
    Them jug walls look THIN!!!
    Thats nothin, you should see some of the Sea Doo 951' bored to 1050, now those are thin. There's plenty left on those GPR cylinders.

  7. #7
    Me Hahn and Joe H204YOU's Avatar
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    That approach was used in the begining.The wrist pins had to be bored,so they were weak in that area.Tripples would cause stress cracks in the rod bosses so other avenues were persued.When the 1300 first came out,it became easier and cheaper to go bigger bore by using the stock 1300 piston as it became available.I think that crank on that was stroked also.

  8. #8

    speedfreaks

    that page has been up for like years

  9. #9
    HopatcongGPR's Avatar
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    old news boyzzzz,,,like 2002 news. he used cr 500 pistons...89mm, standard stroke.....

    u go that big,,,better start thinking out of the box. lots of funky things start to happen over the 1500cc number....imho erics mistake was taking volume AWAY from the exhaust system....it needs MORE volume.
    Last edited by HopatcongGPR; 10-28-2006 at 02:38 PM.

  10. #10
    Me Hahn and Joe H204YOU's Avatar
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    Quote Originally Posted by HopatcongGPR View Post
    old news boyzzzz,,,like 2002 news. he used cr 500 pistons...89mm, standard stroke.....

    u go that big,,,better start thinking out of the box. lots of funky things start to happen over the 1500cc number....imho erics mistake was taking volume AWAY from the exhaust system....it needs MORE volume.
    aaaaaHHHHAAAAA another Big-Foot sighting My low buck tig-man has no help at his shop
    ,or I'd be givin ole bigfoot a bad case of midrift bulge

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