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  1. #1

    GP1200r to GP1300r

    I have a gp1200r that has a blown top end... The front two cylinders are shot and i want to upgrade to a 1300. I have found the top end part number 60T-W1130-01-8S for the cylinders and i need to know if thats the right one. From what i understand they have to be powervalve cylinders? Is this common and does it run well with carbs? Any advice?
    I am new here and thanks for your help
    Mike
    Feel free to call me 516-902-7866


  2. #2
    philip_gpr's Avatar
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    Simple to do, everything just bolts on

    You will need the complete GP1300R top end from a 2003 or 2004 ski

    cylinders
    pistons and rings
    power valves
    cylinder head

    You will also need to change the jetting

    Makes for a cheap upgrade because you can easily sell the GP1200R parts that you no longer need

    http://www.greenhulk.net/forums/show...hlight=gp1300r

  3. #3
    Hydrotherapy's Avatar
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    Quote Originally Posted by philip_gpr View Post
    Simple to do, everything just bolts on

    You will need the complete GP1300R top end from a 2003 or 2004 ski

    cylinders
    pistons and rings
    power valves
    cylinder head

    You will also need to change the jetting

    Makes for a cheap upgrade because you can easily sell the GP1200R parts that you no longer need

    http://www.greenhulk.net/forums/show...hlight=gp1300r
    welcome to forum mike

    +1 what philip said...and you can also use a 60T top end off the 2005 and above years..
    my jump boat is same bottom end and electrics and carbs as your 1200 with my old 05 non pv top end.
    pm me if you want the jetting specs
    Last edited by Hydrotherapy; 05-18-2008 at 03:25 PM.

  4. #4
    Happily Self-Employed WFO's Avatar
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    I have 2 good used complete 1300r cyls with pistons, rings, and valves. Find one more and you are good to go.

  5. #5
    spud's Avatar
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    It will probably be cheaper to have your existing 1200 cylinders punched out and head rechambered unless you can find 3 good used 1300 cylinders and a head. Remember the power valve blades too. For the cylinders, power valves and head it will probably run $1500+ for used. Take some pics and post them. Lowell is fair to deal with in those instances. He machines the powervalves and does everything else.

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  7. #7
    philip_gpr's Avatar
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    This is for one matching cylinder & piston

    Not the 3 cylinders pictured - GRRRRRRRRRR

  8. #8
    spud's Avatar
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    Like I said by the time you find all the pieces it will be easier and cheaper to get the 1200 punched out.

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