Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 27
  1. #1
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,589
    +1
    1,272

    MSX hull - optimal trailer bunk spacing?

    Question is, how have other MSX owners configured their bunks?
    How far apart are your bunks at the rear (outside edge to outside edge), and is it OK to have that air gap between the bunks and the rear hull area with the widely spaced bunks?

    Is there any concern with hull stress cracking in the step area (or anywhere else) from hull flexing while trailering?

    When I picked up my 2004 MSX 140 on Friday, the dealer adjusted the trailer bunks for me, while I watched. Initially, they set the bunks up fairly wide, and the MSX slide on nicely (Liquid Rollers).

    However, I noticed that the last 18" or so of the hull was not touching the bunks at all (finger width gap). The MSX hull has a stepped area on each side of the ride plate, and that meant the entire back of the boat was supported only by the hull step.

    I asked the dealer tech if he though that was going to be a problem, as I had a several hundred mile drive ahead of me. He agreed that it was not optimal, and eventually moved the bunks quite close together, so the bunks are now positioned under the sides of the ride plate. The hull there is not stepped, so the weight is evenly distributed along the bunk's full length.

    While trailering it home (occupying one side of a double Triton Elite), I noticed that despite being tightly restrained with two ratcheting web straps at the rear, the MSX had a tendency to bob around side-to-side on every bump in the road. I think this is because the bunks are so close together, there is a lot of hull overhang on each side.

    The Triton has welded on strap attachment points, but they are actually a little closer together than the hold down U-bolts on the MSX transom. I could create wider attachment points on the trailer, but if I can position the bunks wider, then the existing trailer points should be good enough.

    Photos are of the closely spaced bunks, as it was on the drive home.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	P4279859a.jpg 
Views:	312 
Size:	2.84 MB 
ID:	69875   Click image for larger version. 

Name:	P4279857.JPG 
Views:	363 
Size:	2.04 MB 
ID:	69876   Click image for larger version. 

Name:	P4279854.JPG 
Views:	332 
Size:	2.00 MB 
ID:	69882  


  2. #2
    Rocky_Road's Avatar
    Join Date
    Aug 2007
    Location
    Florida Panhandle
    Posts
    826
    Clean looking ski!

    How many hours...and ever seen salt?

    Oh, yeah...my bunks are farther apart. I will try to snap a picture tomorrow.

  3. #3
    06Busa's Avatar
    Join Date
    Aug 2005
    Location
    Joliet,IL
    Posts
    193
    I can check the manual for bunk spacing in the AM. No access to it here. But mine sat a little funny till I spaced the bunks better.

  4. #4
    06Busa's Avatar
    Join Date
    Aug 2005
    Location
    Joliet,IL
    Posts
    193
    Actually just looking at your bunk spacing. I agree with Rocky. I believe my bunks are about dead center to the drain plugs.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,589
    +1
    1,272
    Quote Originally Posted by 06Busa View Post
    ...I believe my bunks are about dead center to the drain plugs.
    Wouldn't that put the bunks right under the first chines (concentrated load point)?

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,589
    +1
    1,272
    Quote Originally Posted by 06Busa View Post
    I can check the manual for bunk spacing...
    I might have missed it, but I haven't seen any info regarding trailer bunk spacing in the online MSX 140 Owner's or Service manuals.

    I presume the MSX 110/150 manuals would be the same as the MSX 140.

  7. #7
    06Busa's Avatar
    Join Date
    Aug 2005
    Location
    Joliet,IL
    Posts
    193
    I sure thought it was in the manual. Might have been the repair manual.
    I do know my bunks are not on the ride plate. OK, pretty sure.

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,589
    +1
    1,272
    Quote Originally Posted by Rocky_Road View Post
    Clean looking ski!

    How many hours...and ever seen salt?
    Fresh water only, 89 hours, clean hull bottom and deck.

    For some reason, I cannot find the thread from when I was hunting for a 2004 MSX 140.
    I was sure I had posted some pictures of it in that thread (Dec-Jan time frame).

    Anybody else notice that some old threads/posts just don't come up when searching?

  9. #9
    Rocky_Road's Avatar
    Join Date
    Aug 2007
    Location
    Florida Panhandle
    Posts
    826
    Quote Originally Posted by K447 View Post
    Fresh water only, 89 hours, clean hull bottom and deck.

    For some reason, I cannot find the thread from when I was hunting for a 2004 MSX 140.
    I was sure I had posted some pictures of it in that thread (Dec-Jan time frame).

    Anybody else notice that some old threads/posts just don't come up when searching?
    I can definitely agree that this ski has never had salt 'touch' it's lips!

    Looks like you are in for a whole lot of fun...just need the saddlebags to make it complete!

    P.S. I think that I have a new tool kit (unused), if you didn't get one.

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,589
    +1
    1,272
    Quote Originally Posted by Rocky_Road View Post
    ...I think that I have a new tool kit (unused), if you didn't get one.
    Thanks for the offer!

    Polaris Tool kits. I have a couple now.
    Not too impressed; steel tools + watercraft dampness + time = not so shiny tools.

    I want to put together a decent, yet compact, non-rusting tool kit for each ski.
    Suggestions for what should be in it?

    Triple spare spark plug holder, and ...

Page 1 of 3 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. Trailer Bunks Scratching / Skuffing Hull Is It Normal?
    By IIIEXOCETIII in forum Yamaha Open Discussion
    Replies: 13
    Last Post: 07-24-2014, 09:41 PM
  2. Replies: 8
    Last Post: 07-10-2014, 06:13 PM
  3. Replies: 5
    Last Post: 11-25-2013, 12:25 AM
  4. Trailer bunk spacing
    By oldnick in forum Kawasaki Open Discussion
    Replies: 2
    Last Post: 03-04-2013, 09:26 PM
  5. GPR Trailer Bunk Spacing
    By Paul2005GPR in forum Yamaha Open Discussion
    Replies: 0
    Last Post: 03-16-2010, 10:52 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
  •