Page 1 of 6 1 2 3 ... LastLast
Results 1 to 10 of 57
  1. #1
    ultra300x 702's Avatar
    Join Date
    Nov 2011
    Location
    Las Vegas NV
    Posts
    266
    +1
    6

    300x Ultra 15 hrs- boost leak? Only getting 12 psi

    So took the ski out yesterday and while it was running good something just felt off, looked down at the boost guage and noticed i was only at 10 bars? So i came to a stop and tried a WOT pull and was only at 12 psi, then when hitting top speed the boost cut back another few bars maybe being around 10. Thinking maybe loose hose clamps,fouled plugs, any ideas guys?

    The motor is stock with the R&D scom. Cruise and KSS disabled. I never did the blowoff mod to tigthen the spring


  2. #2
    Banned User
    Join Date
    Aug 2009
    Location
    Discovery Bay, CA
    Posts
    3,048
    +1
    336
    The dash lies....

  3. #3
    ultra300x 702's Avatar
    Join Date
    Nov 2011
    Location
    Las Vegas NV
    Posts
    266
    +1
    6
    Quote Originally Posted by Mike H View Post
    The dash lies....
    Have heard that before but the ski didnt feel like it was pulling like usual.

    I just had a thought the last time i went out i panic reved the motor and it was at WOT for maybe 2sec or 3 out of the water when i launched off a wake . Could i have cause any damage that way? Gonna check my clamps,plugs,coil connections etc.

  4. #4
    Banned User
    Join Date
    Jan 2009
    Location
    LA/oc
    Posts
    3,911
    +1
    129
    What's your max rpm it's making that will be the true test. But as mentioned check all your hoses. Check your exhaust filter as well.

  5. #5
    ultra300x 702's Avatar
    Join Date
    Nov 2011
    Location
    Las Vegas NV
    Posts
    266
    +1
    6
    Quote Originally Posted by FIRE0021 View Post
    What's your max rpm it's making that will be the true test. But as mentioned check all your hoses. Check your exhaust filter as well.
    Just checked it maxed out at 7660rpm on the dash i reset it everytime when i ride so that seems to be the last highest reading

  6. #6
    Banned User
    Join Date
    Jan 2009
    Location
    LA/oc
    Posts
    3,911
    +1
    129
    U really need to check the live rpm while riding. But with scom u seem to be down a bit. Check that exhaust filter and all the hoses.

  7. #7
    FullTilt429's Avatar
    Join Date
    Jul 2010
    Location
    Pleasanton, CA USA
    Posts
    332
    +1
    6
    Block that bitch off and retest.

  8. #8
    ultra300x 702's Avatar
    Join Date
    Nov 2011
    Location
    Las Vegas NV
    Posts
    266
    +1
    6
    Quote Originally Posted by FullTilt429 View Post
    Block that bitch off and retest.

    I thought it was more to it if you install that blockoff plate? Like some other things have to be blocked off also? I know what a blowoff valve is but got no idea where that plate goes..


    I checked my hoses and clamps also pulled the plugs everything is good. Guess i gotta take apart the exhaust filter ski only has 15 hrs i thought the filters last around 25hrs?

  9. #9
    Self Confessed Day Dreamer toomanytoys's Avatar
    Join Date
    Sep 2008
    Location
    Sydney, Australia
    Posts
    1,932
    +1
    151
    if I get a speed alarm 10-12 PSI is the max I get a full throttle. Maybe your SCOM is playing up? Try disconnecting it and see what happens.

  10. #10
    "just sayin".. jetdave56's Avatar
    Join Date
    Nov 2008
    Location
    JERSEY SHORE
    Posts
    4,494
    +1
    617
    Quote Originally Posted by ultra300x 702 View Post

    I thought it was more to it if you install that blockoff plate? Like some other things have to be blocked off also? I know what a blowoff valve is but got no idea where that plate goes..


    I checked my hoses and clamps also pulled the plugs everything is good. Guess i gotta take apart the exhaust filter ski only has 15 hrs i thought the filters last around 25hrs?
    in that pic of yours...bottom left hand corner...the plate has the same shape as what you're removing...

Page 1 of 6 1 2 3 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Video of how I check for Boost leaks on a Ultra 300 or 310
    By rod_rod in forum Kawasaki How To & FAQs
    Replies: 7
    Last Post: 05-12-2016, 02:50 PM
  2. Help guys loosing my mind here. Cant hit full boost- 300x ultra
    By ultra300x 702 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 10
    Last Post: 07-06-2015, 10:23 AM
  3. ultra 250x full boost but only reaching 6400 rpms max! HELP
    By rich7079 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 4
    Last Post: 07-27-2014, 10:08 AM
  4. 2009 ultra 260x 15 hrs.
    By halfassjack in forum Kawasaki Skis
    Replies: 2
    Last Post: 09-08-2009, 08:04 AM
  5. RXPX 15 hrs (maint) only 6000-6100 rpms
    By razrfish in forum 4-Tec Performance
    Replies: 16
    Last Post: 10-27-2008, 10:27 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
  •