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Thread: 2003 gp1200r

  1. #1

    2003 gp1200r

    Hi guys new to the forum I have just purchased a gp1200r 2003 with 212 hrs. Seems to run fine and was just wondering if there is anything I should be doing before I set out in a decent run like powervalve clean etc. not sure of the service history but have been told powervalves get jammed up in them? Thanks in advance


  2. #2
    I have a 2001 if I was you I would put wave water clips on it if it dosnt already have it
    aswell as a pump seal kit and an intake grate from R&D

  3. #3

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    2003 is gpr 1300. The last year for gpr 1200 was 2002. Need to verify what you have first. If itís 2003 1300 you shouldnít have anything to worry about. And Iím pretty sure if its 2002 gpr 1200 the pvís were good that year.

  4. #4
    Dave in DE's Avatar
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    As blue notch said, first we need to determine what you have. In 03 they didn't produce a 1200. In 02 they did. 03 would be 1300. Check your hull Vin tag on the right rear of hull. the last 2 digits are the year. Also check the left inside of eng compartment for model sticker. This will help us determine what you have and your path forward.
    Either way though some very important maintenance is verification of power valve wave eater clips or equivalent. Replacing oil injection hoses from pump to thottle body/carbs(depending on what you have). And lubing the mid shaft bearing with a couple pumps of marine grease.
    Last edited by Dave in DE; 09-16-2018 at 03:28 PM.

  5. #5
    Definetly 03 and from other catalogues they list 2003 gpr1200. It’s carby and I live in Australia maybe they came out over here in that year. Cheers guys

  6. #6
    Dave in DE's Avatar
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    Ah yes, sorry, I wasn't thinking outside of the states. In that case yes it could be 03 and 1200. Your profile doesn't show location.
    Anyway first things I'd check are power valves for wave eater clips or equivalent. This will keep the cross pin in your valve. The other is to replace your oil injection lines if it still has the system in place. And to grease the mid shaft bearing. 2 pumps.

  7. #7
    Quote Originally Posted by Dave in DE View Post
    Ah yes, sorry, I wasn't thinking outside of the states. In that case yes it could be 03 and 1200. Your profile doesn't show location.
    Anyway first things I'd check are power valves for wave eater clips or equivalent. This will keep the cross pin in your valve. The other is to replace your oil injection lines if it still has the system in place. And to grease the mid shaft bearing. 2 pumps.
    No wave eater clips, the links have been replaced with new Yamaha ones. What size bore are these? 80mm? Oil lines look new. Comp is down a little. 105 in each cyl. Hopefully gets me through the summer and il do the top end in the winter.

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    Dave in DE's Avatar
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    Sounds like you've got it covered. Yes there 80mm bore. Compression is low, should be about 130. The lower it gets the harder it's going to start.

  9. #9
    Quote Originally Posted by Dave in DE View Post
    Sounds like you've got it covered. Yes there 80mm bore. Compression is low, should be about 130. The lower it gets the harder it's going to start.
    Thanks for that.. anyone on here do a good deal on a top end kit at all?

  10. #10
    Dave in DE's Avatar
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    I'd use WSMparts.com and go with the pro-x or wsm brand. STD bore in pro-x would $140 a piston. While WSM's are $88. Then you'd have to add a gasket set.
    Pro-x of coarse is a higher end piston aimed more toward racing. WSM is oem.
    If it's never been apart you should have plated cyl if there in good shape you can hone or not hone and replace pistons. I prefer to give them a light hit with hone. If they've been sleeved get one size up and bore.
    You'll also have to look it up under 2002. Because here in states 02 was last of 1200 model. 1200 power valve motors all the same bore/Stoke wise.

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