Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 40
  1. #11
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canadia
    Posts
    47,182
    +1
    2,813
    Quote Originally Posted by HardRider View Post
    … reliable ski for 5 years at 80mph. ...
    I suppose how often and for how long it is running at that near 80mph speeds might affect the durability?

    We are near 400 hours on two 2017 GP1800 SVHO. Riva Stage 1 Plus tunes so top speeds are well above 70.
    Another friend has at least that many running hours on his.

    Within the next 100 hours or so I anticipate the second supercharger clutch replacement, and probably some other item. Friend needed a new throttle body, ours continue to work normally.

  2. #12
    Orlando Shark's Avatar
    Join Date
    Mar 2009
    Location
    Orlando, FL
    Posts
    2,722
    +1
    45
    So far, I am aware of heads cracking(supposed to have been fixed for 22) and flame arrestor coming loose and bending valve. So does this mean all I have to do is remove flame arrestor and I should be good to go? I haven’t heard of any pistons melting because the tune caused it to go lean or anything else tune related. This is what I am trying to gather.

  3. #13
    K447,
    This is a testament to your mechanical skills. 46K post. 99.5% of people doesn't have your waverunner knowledge, knowing what and what not to do. I would not say your longevity is indicative of the product line.

  4. +1 by:


  5. #14
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canadia
    Posts
    47,182
    +1
    2,813
    Quote Originally Posted by HardRider View Post
    … mechanical skills… what and what not to do. …
    My engines are mechanically stock.

    Other than removing the flame arrestor and a couple of other minor changes that are now included as standard factory production, the engines are not touched. Certainly not in a way that would make them last longer. No blow-off valve, stock supercharger, stock intercooler, stock clutches.

    Oil changes every 50ish hours, with new oil filter.

    Riding-wise is mostly distance cruising with some rough water blasting across the waves. Wave jumping is not a thing for us.

  6. +1 by:


  7. #15
    very reliable those svho

  8. #16
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    38,905
    +1
    3,411
    Quote Originally Posted by HardRider View Post
    does anyone have picture of the changes on the 2021 heads? This rumor starts every year something been changed be in the end never seams to come to fruition.
    Quote Originally Posted by TimeBandit View Post
    So we'd need some actual photos - if anyone has any??
    Visually you wouldn't be able to see anything in a side by side pic. The changes made are with the thickness of the casting.

    The 2021 and newer heads have been updated.

  9. #17

    Join Date
    Jun 2007
    Location
    Long Island,NY
    Posts
    252
    +1
    24
    Quote Originally Posted by Shark View Post
    Thanks for the replies, great info and learning lots about the SVHO's. I would still be interested in what failures have occurred even if prior year than the 22's. I haven't even gotten my maptuner yet and already have retainers in the cart about to add that lol. My goal is to have a decently reliable sub 80 mph ski for 5 years and then will probably end up putting a turbo on it.

    From what I have gathered, Supercharger clutches are not covered by warranty at all and are treated as a wear item correct?
    My ridding buddy was blowing clutches every 40-50 hrs on his stage 2 plus Fx svho , Yamaha replaced them under warranty every time -3 total. However when his motor threw rod on 150 hrs they refused to cover it under warranty.

  10. +1 by:


  11. #18
    Orlando Shark's Avatar
    Join Date
    Mar 2009
    Location
    Orlando, FL
    Posts
    2,722
    +1
    45
    Quote Originally Posted by mario View Post
    My ridding buddy was blowing clutches every 40-50 hrs on his stage 2 plus Fx svho , Yamaha replaced them under warranty every time -3 total. However when his motor threw rod on 150 hrs they refused to cover it under warranty.
    This is what I’m looking for.

    When you say stage 2+, do you happen to know what mods he had and what rpm he was spinning.

    I am guessing that for a sc clutch not much was asked or inspected and they rather give the customer the benefit of the doubt since it’s only a couple $100 for them. But when it comes to replacing an engine, I am sure they look for any reason to deny the claim if there are mods installed since this is now a couple $1,000’s.

  12. #19
    mittens's Avatar
    Join Date
    Mar 2018
    Location
    Huntsville, AL
    Posts
    1,526
    +1
    185
    I asked this in another thread. What markings show on the head that it's the new part number or design?

    also looking at parts diagrams... there is a change at 2021 but then another change at 2022.... so what was the change the second time.... if buying a new head does the -12 head get you the new casting fix, or do you have to buy the -20

    loaded heads
    2014-2015 = 6ET-W009A-00-94
    2016-2020 = 6ET-W009A-01-94
    2021 = 6ET-W009A-02-94
    2022 = 6ET-W009A-20-94

    bare heads
    2014-2020 = 6S5-11102-11-00
    2021 = 6S5-11102-12-00
    2022 = 6S5-11102-20-00

    Last edited by mittens; 08-12-2022 at 08:46 AM.


  13. #20

    Join Date
    Jun 2007
    Location
    Long Island,NY
    Posts
    252
    +1
    24
    Quote Originally Posted by Shark View Post
    This is what I’m looking for.

    When you say stage 2+, do you happen to know what mods he had and what rpm he was spinning.

    I am guessing that for a sc clutch not much was asked or inspected and they rather give the customer the benefit of the doubt since it’s only a couple $100 for them. But when it comes to replacing an engine, I am sure they look for any reason to deny the claim if there are mods installed since this is now a couple $1,000’s.
    On top of stage 2 components he had a Riva SC shaft, TB billet plate, catch can, free flow exhaust . As for rpms , I can tell you that I've newer seen a single ski regardless brand or which stage it had , that would run Riva advertised speed/ rpms in summer months on their impeller recommendations. So over revving wasn't a factor.

  14. +1 by:


Page 2 of 4 FirstFirst 1234 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 2017 SVHO Head Failure question
    By HardRider in forum Yamaha PWC Performance (4-stroke)
    Replies: 2
    Last Post: 10-29-2021, 09:23 AM
  2. Svho engine failure
    By GreenHulk Jr in forum Yamaha PWC Performance (4-stroke)
    Replies: 10
    Last Post: 10-25-2021, 09:39 AM
  3. 2016 FX SVHO Piston Failure
    By 1FastYam in forum Yamaha PWC Performance (4-stroke)
    Replies: 8
    Last Post: 10-27-2020, 01:23 PM
  4. Preventing SVHO Timing Chain Failure!
    By RonJon in forum Yamaha PWC Performance (4-stroke)
    Replies: 82
    Last Post: 12-09-2019, 07:43 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •