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Type: Posts; User: Prism

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  1. Replies
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    203,051

    Sticky: Nice job Jerry! Triple pipe days are close to...

    Nice job Jerry! Triple pipe days are close to over! Looking closely at these. Congrats!
  2. 05 and newer skis had the factory installed...

    05 and newer skis had the factory installed updated pump shoe brackets. Pump shoe pull down was a known issue on all 2003 and some 2004 GP1300R skis. There was a recall way back then and Yamaha fixed...
  3. Hydro, I agree with everything you've said. R&D...

    Hydro, I agree with everything you've said. R&D on 2 stroke stuff did abruptly stop with the intro of the supercharged 4 strokes...and yes, I've contemplated a stand alone system to run the whole...
  4. No more news... it seems to be a dead...

    No more news... it seems to be a dead end...believe me I've searched for options. 2 strokes and the ability to tune them easily by the end user looks to be an expensive and totally custom endeavor. ...
  5. Replies
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    4,704

    In my opinion, even if you had cylinders with the...

    In my opinion, even if you had cylinders with the largest size stamped on the side and "by mistake" you installed the smallest "A" sized piston, issues with excessive clearence are not likely at all....
  6. Replies
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    4,704

    Another option worth throwing out there is the...

    Another option worth throwing out there is the alloy used for both the piston and the pins. If it is an expansion issue causing the OEM pin loosening, another forged piston manufacturer may have...
  7. Replies
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    4,704

    Personally, I've seen and experienced pin...

    Personally, I've seen and experienced pin loosening on OEM pistons. I've mainly used ProX pistons since and have not had an issue with pin retention. From my time on the forum, I have heard of others...
  8. Thread: PPK DIY

    by Prism
    Replies
    8
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    877

    Go to a craft store or the craft section of your...

    Go to a craft store or the craft section of your local walmart and buy some casting resin. You mix it up and pour it in the voids. It hardens like plastic when dry. After that, reinstall and seal...
  9. I bet the foam piece blew out between the pump...

    I bet the foam piece blew out between the pump shoe and transom plate. It probably needs sealed with 3m fast cure.
  10. Replies
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    2,543

    I've saved tubes of 5200 from hardening in the...

    I've saved tubes of 5200 from hardening in the tube by placing them in a ziplock bag and storing them in the freezer. When reusing the tube from the freezer, the 5200 still worked as intended once it...
  11. Thread: Rpm

    by Prism
    Replies
    9
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    819

    If the engine seems to be running good but you...

    If the engine seems to be running good but you don't go more than 5mph, then there is something wrong with the jet pump or driveshaft/coupler. The first thing to do is look up into the jet pump...
  12. Replies
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    817

    If you're using the stock 87mm currently and your...

    If you're using the stock 87mm currently and your RPM is 7050, switching to an 85mm nozzle will bring you under the suggested "minimum" RPM powerband. Best case, you will likely experience a loss of...
  13. Thread: Rpm

    by Prism
    Replies
    9
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    819

    So this is a propulsion issue correct? RPM is...

    So this is a propulsion issue correct? RPM is good but you don't go anywhere? Does it move at all? We need more information. Year, model, speed, rpm, etc.
  14. Replies
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    Most of the bottled "fuel system" cleaners on the...

    Most of the bottled "fuel system" cleaners on the market today are naptha/oil based and an alcohol as the cleaning agent. Ethanol (grain alcohol) is in most pump gas today at concentrations of 10%....
  15. Check for a plugged or failed gas tank vent. Next...

    Check for a plugged or failed gas tank vent. Next time it acts up, remove the gas cap for a second then see if it runs good again for a while. If the vent plugs up you end up pulling a vacuum on the...
  16. Replies
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    1,708

    Just buy some methanol at the track if youre...

    Just buy some methanol at the track if youre using seafoam.
    It'll be cheaper, you'll get more, and it's virtually the same.
  17. Replies
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    565

    If it were me, I would buy a set of powervalves...

    If it were me, I would buy a set of powervalves off a low hour ski, send the jug to Millenium to be replated, re ring it, then call it a day. Keep in mind non 1300 powervalves need to be clearenced....
  18. Replies
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    The final 2 stroke build

    Ok, so in this day and age, many have moved. on to the "boost wagon"...I get it, this is where we're heading. I implore, don't forget your roots. I have one last build in me...triple pipes. I can...
  19. Replies
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    955

    I hope things go your way. You brought it to the...

    I hope things go your way. You brought it to the people who should know it best...the dealer. But unfortunately in this day and age you'll have to fight to make it right as they are not "stand up"...
  20. Replies
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    WOW! The forum turned into a GroupK-A-thon in a...

    WOW! The forum turned into a GroupK-A-thon in a couple of hours. WTF? The only thing Ill say is they are good at the Yamaha stuff but they leave some performance on the table...usually for...
  21. Replies
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    When you had the carbs off did you look at the...

    When you had the carbs off did you look at the reeds?
  22. Yawn...

    Yawn...
  23. Replies
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    451

    Seems like you're running race fuel already from...

    Seems like you're running race fuel already from the sound of the build. Detonation would be the only concern I can think of, but if you run enough octane and fuel, I don't see an issue with a key....
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    These are some of the people I have personally...

    These are some of the people I have personally used to get work done, parts from, and get opinions & technical collaboration from. They will fully understand what you're after with a 1390 build to...
  25. Replies
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    807

    If you plan on keeping the EFI then there is...

    If you plan on keeping the EFI then there is really only one answer. Ported 1390. There currently is no way to effectively use triples on an EFI boat as the rev limiter (7450rpm) and timing curves...
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