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  1. #1

    Question for GP1200 tuners about carbs

    I have a 1997 GP1200 with the R&D power plenium, boyeson power reeds, and a nujet impeller as the only mods. I rebuilt the carbs last fall but didn't check everything so they have to come off again. Just wondering if I should stay at stock jetting and needle settings? Plus,does anyone know pop-off pressure? Oh,and it's premix. Thanks.


  2. #2
    Yamaha artisan Cutlass's Avatar
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    135 main jets and 100 pilots.
    High screws 1 1/2 turns out. Lows 1 1/4 turns out.
    1.5 N/S and 115g spring.
    Thats what I run. My pop-offs were around 48 to 50 psi.

  3. #3
    Just checked, got 50 lbs pop off. Ordered new pilots (100). Isn't high setting way high?

  4. #4
    Yamaha artisan Cutlass's Avatar
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    I got those recommendations off other posts. So far its been running great for me with those settings. I'd rather be a little rich anyways.

  5. #5
    Hey that's cool, I'll try it. Really wasn't running too bad at stock settings but thought since it's premixed I probably should run rich. Pop off on 2 carbs were 50 but mag carb was 65 so I changed the spring to make it match. My mix seemed rich too so I'm draining everything and changing the fuel filter.
    Hey Cutlass....ever make it up north to Minocqua? A lot of good riding up here. Lake Superior waves are nice in October/November too.

  6. #6
    800AMSOIL4U's Avatar
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    You can also check with Osidebill here.

  7. #7
    Yamaha artisan Cutlass's Avatar
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    Quote Originally Posted by fedorov5549 View Post
    Hey Cutlass....ever make it up north to Minocqua? A lot of good riding up here. Lake Superior waves are nice in October/November too.
    My wife's been up there a few times. She even has a hooded sweatshirt that says Minocqua on it.

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