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  1. #1

    Exclamation guys can I have your experience by modifying the old Yamaha wave runner

    Hi guys,

    I am a new member and I need your experience to help me by modifying my old jetski 1993 Yamaha wave runner 650.

    Last week I did a small project in my old Yamaha wave runner 650cc stock engine. I replace the engine with a brand new Yamaha 700cc stock engine with 2 carburetors and it goes faster than the old engine but I am really excited to get more power in this small jetski to go faster by modifying the new engine, and I need your help and experience to modify this engine without any problems and bad effects to the engine.

    So Id like to know what is the parts that I should buy for this engine..

    I know that it's a crasy idea for an old jetski but l am really excited to do it

    I am waiting for your ideas urgently

    Thanks and sorry for bothering you guys with me

    c u
    Last edited by VTC; 08-04-2008 at 02:37 PM.

  2. #2
    Join Date
    Apr 2006
    Orange, TX
    The basic mods will wake the 701 motor up, such as a pipe, getting rid of the stock restrictive air box (get air filters) and adding compression.

  3. #3
    Moderator RX951's Avatar
    Join Date
    Apr 2005
    League City, Texas
    welcome to the forum. Also take the time to download a service manual for your ski located in my signature below.

    Here is a link with more
    Last edited by RX951; 08-05-2008 at 08:31 AM.

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