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Thread: 07 gp1300r

  1. #1

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    07 gp1300r

    So I've just recently gotten an 07 gp1300r with just under 50 hours. only upgrade to it is the d plate. Just ordered the riva free flow exhaust, kn air filter and oil block off plate. I have 2 96 yamahas 1 700 raider and 1 1100 venture raider still has oil injection 1100 is premix. I've always used penzoil full synthetic for my 96's at 50:1 on the venture. Is that all good on the newer 1300 to block off oil injection and run penzoil full synthetic at 50:1? Both my 96's have been in the family since new but when I got them in 2003 ice been running penzoil, never rebuilt good compression...or should I run 40:1 I want to stick with an oil that's easy to come by in st louis and not have to order online


  2. #2
    OzarkYamMonster's Avatar
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    mrjason82, hello and welcome to the Hulk. Just wondering ... why did you order the FF exhaust? It will be loud and not really perform better than your stock sound suppression system. It will actually rob you of some top end. Yes you can go oil block off but why? Did your oil injection system ever fail? I have never yet seen nor located a 07 GP1300r that the oil injection system ever stopped working ... I have never ever met the person whom they can stated their oil lines ever shrunk or popped off of a GP1300. I think 50:1 on your oil if you premix will just be a tad lean. It will not harm your engine to receive a little bit more oil. I saw you live in St. Louis, do you ever get down here to the LOZ ?

  3. #3

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    Hey thanks for replying...I don't make it to loz too often, maybe once a year. I got this gp1300 from surdyke there and just picked it up last weekend. I've heard horror stories from this forum and others about oil lines coming loose so I didn't really want to chance it. I have also heard the oil pump itself is very reliable and not likely to fail. I do like a louder exhaust so sacrificing a lil top doesn't really bother me much if it makes the engine sound a bit more mean. Only other pwcs I've owned were the 96's I had talked about so this 1300 is a beast compared to what I'm used to. I really just ride the meramec river around our "redneck yacht club" we got around here it's already the fastest on the water near here.

    I have been running 50:1 on my 1100 but if u do put the block off on I'll run 40:1 just to be on the safe side. What part of loz are you on? My step dad has a pave on the Gravois arm, Bogue bay. I'll be down there in a couple weeks to pick up another waverunner to work on and maybe stay a night or two

  4. #4
    OzarkYamMonster's Avatar
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    Hello mrjason82, I live right off of 5 south, toward Camdenton. That is a bout 20 miles from Gravois. near the 31 mile marker (Just west of Lynn Creek ... if you have a map).
    I have the 08 GP1300, I did just install the FF exhaust. I have not started the ski up yet. So I do not know how she will sound. When you plan to come down in a few weeks maybe you will have time to meet up. I will show you what I have been up to this winter. I can not think of any more mods that I could possibly do to this ski, LOL. Give me a call. Steve @ 720-323-2169 or PM me [email protected]

  5. #5
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    Okay you need to stop right there. You're doing basically everything wrong please read the forums.

    Do NOT remove the oil injection. They do not fail. It's the same setup as the Yamaha outboard motors and there's millions of those out in the world. Do not remove it.

    Cancel the order for the Riva free flow exhaust too. It's very well documented they make the GP1300r slower than stock.

    KN Air filter? Eh. No. Again read the forums.

    You got one thing right with the D-plate. Your next mods should be a milled R&D ride plate, R&D GP800 or GP1300 intake grate depending on your riding style, aftermarket tach with memory (I use TTO), R&D air intake setup, impeller, pump wedge, metal steering nozzle, stuffer kit, then after all that... you should be close to 70mph. If you want more speed you can then look into ignition keyway, mill the head, ecu fuel tuner, port polish the motor... etc.

    There's no problem doing 80mph on pump gas with a GP1300r. With the oil injection still in place.

  6. #6
    Prism's Avatar
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    For what it's worth... people remove the reliable pump system on 2003 and newer skis not only for bullet proof reliability, but also they want the 1.8hp that it takes to turn the oil pump 7200 rpm to go to the prop instead of the oil pump. It turns your 80mph 7200 rpm GPR with oil injection into an 80.5mph 7250rpm GPR. (exaggerated) The free flow is used on ported machines usually running a 1200 waterbox to keep detonation at bay. (That's another story on 2 stroke exhaust theory) The best thing you can do is search this forum to find out how and why things work and ask questions from those that came before. Good luck with your new ski!
    Last edited by Prism; 03-26-2015 at 08:04 AM.

  7. #7
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    Removing the oil injection also requires a $600 ECU fuel tuner if you don't want to blow it up from running lean.
    Last edited by riick370; 03-24-2015 at 10:47 AM.

  8. #8
    CARLRRE's Avatar
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    I have over 500 hours on my 2004 Riva Racing GP1300R using Full synthetic oil with the factory oil injection. Ski has never been apart. Runs great, and totally dependable.

  9. #9
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    Quote Originally Posted by CARLRRE View Post
    I have over 500 hours on my 2004 Riva Racing GP1300R using Full synthetic oil with the factory oil injection. Ski has never been apart. Runs great, and totally dependable.
    Which oil? I'm about to run out of Yamaha branded oil and have been wanting to switch to synthetic.

  10. #10
    Prism's Avatar
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    Most fast skis here run Klotz or Amsoil. I personally run Klotz ski craft although I've used Walmart quicksilver full synthetic in a pinch. It's made by Mercury Marine.

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