Page 2 of 2 FirstFirst 12
Results 11 to 16 of 16
  1. #11

    Join Date
    Feb 2019
    Location
    Maryland
    Posts
    9

  2. #12
    kmaher's Avatar
    Join Date
    Jul 2015
    Location
    Norton, Ohio
    Posts
    263
    +1
    43
    I can definitely hear what you're concerned about, and I agree that it sounds like a bearing in the bottom end.
    Did you blip the throttle mid-way through the video, where the rattling briefly subsided?

    My thought is, if it were a bearing in the bottom end, it should continue to rattle, but with more intensity, as it moves up through the RPM range. Instead, with just a very small increase in RPMs, the sound vanishes.

    And it didn't do this before you had the head machined, right? What all did you disassemble when you sent the head off to be machined? Did you have a jog off at all?

    I'm just a back-yard hack, but there are folks on here with tons of experience with the 1300s. I imagine someone will be able to identify and diagnose that sound for you really fast (hopefully).

  3. #13
    kmaher's Avatar
    Join Date
    Jul 2015
    Location
    Norton, Ohio
    Posts
    263
    +1
    43
    Another important question:

    Have you run it in water with the seat off? Does it still make this noise, or no?
    If it doesn't do it while under load, I personally wouldn't be too concerned about it.


  4. #14

    Join Date
    Feb 2019
    Location
    Maryland
    Posts
    9
    I did raise the rpm a little so you could hear that I goes away with that slight increase in rpm.
    I don’t think there is any way it would run as well as it does if a crank bearing was making that noise, but maybe the shaft bearing. I haven’t, but do need to take the seat off and try it.
    It didn’t make the noise until after the second time I had it in the water and I had the head decked before I put it in the water the first time.
    I haven’t had any jugs off, just the head.
    I’ll probably replace the bulkhead bearings this winter, just in case it is failing.
    Hopefully nothings wrong, but if something is I’ll find out sooner or later. Lol
    Im a little worried the top speed is slower than it should be, but I thought I was gonna die when going about 60 in water that was not smooth enough to be going that fast.

  5. #15
    kmaher's Avatar
    Join Date
    Jul 2015
    Location
    Norton, Ohio
    Posts
    263
    +1
    43
    Besides the shaved head and fuel controller, what other mods does the ski have, if any? And, how much tuning have you had a chance to do since adding the controller?

    If you're otherwise stock, I wouldn't be surprised if you'd run a max of 64 or 65mph as is right now, and that's on smooth water where it has a chance to stop porpoising and max out.

  6. #16

    Join Date
    Feb 2019
    Location
    Maryland
    Posts
    9
    I filled out my signature and think I got all of the info in there. I need to mess with the angle of the ride plate. Right now its just bolted flush to the hull without any washers/ shims.

    I got my tach in yesterday, so when I get the chance to make it out on some smooth water I can get a better idea as to how it is performing.

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Jet pump rattle at idle in the water
    By jackofalltrades in forum Polaris Open Discussion
    Replies: 20
    Last Post: 05-13-2018, 06:54 PM
  2. 2-Stroke Waverunner Gp800 rattle at idle
    By Paul1987 in forum Yamaha Projects & Build Threads
    Replies: 0
    Last Post: 07-06-2016, 06:12 AM
  3. GP1300R Idle issue
    By Peachymc in forum Yamaha Open Discussion
    Replies: 12
    Last Post: 03-16-2013, 06:50 AM
  4. Rattle/knock at idle
    By Dixieboy in forum 2-Stroke Performance
    Replies: 10
    Last Post: 09-06-2009, 10:11 PM
  5. GP1300R Idle Issues
    By Trinimd in forum Yamaha How To & FAQs
    Replies: 7
    Last Post: 06-25-2007, 04:02 AM

Posting Permissions

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