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  1. #1

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    09 SHO lost 15 mph top speed

    Hi all. I never post here so I thought I'd start. I have 2 ski's 09 SHO & 06 Honda f-12x, and I'm looking for a Yamaha gpr 1300 to add to the collection (anyone selling one PM me). Hopefully this doesn't stir up #[email protected]&, but everyone that's ridden both my ski's and my friends Seadoo gtx's prefers the Honda...... I'm the only one that's ridden them all that likes the SHO....,and this is about 30+ opinions. Anyways the SHO lost 15 mph at the end of the season. I took it to my buddies shop at the lake of the ozarks, RPM Marine in sunrise beach (great shop, and great guys), & so far they found the impeller is completely fragged & possibly more. I just got an R&D stage 1 kit & a pump tunnel reinforcement. Looking forward to getting the mods on and seeing how they do. I ordered everything from 4-tech performance & The customer service is the best by far of anyone else I've ever dealt with. Anyways thanks for letting me post here & I'll post more often. Take care everyone.


  2. #2
    Whats that whistling noise? jtskier11's Avatar
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    Quote Originally Posted by Sikes44 View Post
    Hi all. I never post here so I thought I'd start. I have 2 ski's 09 SHO & 06 Honda f-12x, and I'm looking for a Yamaha gpr 1300 to add to the collection (anyone selling one PM me). Hopefully this doesn't stir up #[email protected]&, but everyone that's ridden both my ski's and my friends Seadoo gtx's prefers the Honda...... I'm the only one that's ridden them all that likes the SHO....,and this is about 30+ opinions. Anyways the SHO lost 15 mph at the end of the season. I took it to my buddies shop at the lake of the ozarks, RPM Marine in sunrise beach (great shop, and great guys), & so far they found the impeller is completely fragged & possibly more. I just got an R&D stage 1 kit & a pump tunnel reinforcement. Looking forward to getting the mods on and seeing how they do. I ordered everything from 4-tech performance & The customer service is the best by far of anyone else I've ever dealt with. Anyways thanks for letting me post here & I'll post more often. Take care everyone.
    If its cavitating heavily I would look at your prop, liner and possibly your transom sealing first. Second would be to ask what your top end rpm's are. If they are excessivley low that can be indicative of a boost leak or clutch causing you not to build any boost. What all has that mechanic checked?

  3. #3
    superair's Avatar
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    Re: 09 SHO lost 15 mph top speed

    Welcome to the forum.

    You said your impeller was toast, make sure they check the liner as it will most likely be messed up. You can order a replacement liner on the OEM link from Greenhulk.

  4. #4
    AWA MEMBER
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    These guys are smart.....supply them with enough information.....they will diagnose your problem

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  6. #5
    damn lately everyone is losing speed.what kind of rpms are you turning ? if the impeller dont fix it check the clutch.

  7. #6

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    Thanks all. He said he wanted a good impeller to check the liner. He checked the supercharger,clutch,etc, & they all appear fine. The impeller was in horrid shape, idk if its -15 mph bad, but really chewed up. RPM's seemed normal, I just lost 10-15mph top end. Once the parts get to the shop we'll slap them on & hopefully that will fix it. I ended up ordering a few more bolt ons (adjustable cam gear, lengthened nozzle, pump reinforcement, Jim's modded stock ride pate) not included in the stage1 kit & sent the ECU to get reprogrammed. Looking forward to see how it runs this spring/summer. Thanks for the input all

  8. #7
    Whats that whistling noise? jtskier11's Avatar
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    Cam gears?

  9. #8

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    http://www.4-tecperformance.com/inde...oducts_id=1935
    Someone recommended it to me. Thoughts

  10. #9
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Sikes44 View Post
    I ordered everything from 4-tech performance & The customer service is the best by far of anyone else I've ever dealt with.

    Thanks very much for your business and thank you for the kind words!

    Jerry

  11. #10
    right on ! for supporting the forum.jerry is a busy guy but he always responds to forum members promptly.he is the man.

    on a side note.be careful just throwing parts at the ski without first isolating the issue as it could just bandaid the problem.once your speed goes up you may think your issue is cured but you then may notice your buddies with less mods are faster and your issue is still lingering.if it where me id fix the impeller and get a gps on the ski and make sure it clocked 65-67mph before even adding anything else.

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