Results 1 to 3 of 3
  1. #1

    1998 GP800 Trim Tabs

    I have a typical 1998 GP800 that I can't seem to keep in the water (Porpoising) After reading several post I'm confused (no surprise) on the early 98 vs the later 98 models. How do I tell which one I have and will the trim tabs work on my machine and are they even needed on it. I don't want to modify the ride plate at all. It already has one broken bolt in it and I'm not willing to try removing them and breaking more. I'm posting a couple pictures of the back. If someone can help me identify what I have I'd appreciate it
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	2012-06-12_12-23-35_282.jpg 
Views:	79 
Size:	46.8 KB 
ID:	274331   Click image for larger version. 

Name:	2012-06-12_12-24-01_277.jpg 
Views:	37 
Size:	43.8 KB 
ID:	274333  

  2. #2
    Yamaha artisan Cutlass's Avatar
    Join Date
    Oct 2010
    Madison, WI, USA
    You have the later 98 hull. They do make small trim tabs for the later hulls. You also have the short ride plate. the longer 97 plate or a longer aftermarket ride plate should help your porpoising. Another thing that helps is a scoop style intake grate,because it'll suck you down to the water and also help keep the pump hooked up.
    There are techniques for removing and repairing ride plate bolts and the nut inserts in the hull. I had to repair mine. It takes a heat gun and scraper and lots of patience to remove the old nut inserts and you can repair from there by re-gluing the nut inserts or use a the method described in this post.

  3. #3
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    United States
    Braindead I am the guy you contacted on ebay regarding the tabs. here is a link to make them yourself as well.
    If you decide you want to purchase contact me here, I will give you a better deal than on ebay.
    I will be putting my ebay stuff on vacation setting tomorrow as I will be gone for a week.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Gp800 trim tabs
    By redneck71 in forum Yamaha Old School Skis
    Replies: 0
    Last Post: 10-02-2015, 04:06 PM
  2. 1998 GP760 trim tabs/ride plate/porposing questions
    By FireFoxxy in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 07-18-2009, 11:05 PM
  3. 1998 GP800 - Porpoising/Trim Tab Kit??? Which kit
    By jchale in forum Yamaha Old School Skis
    Replies: 38
    Last Post: 04-24-2009, 02:11 PM
  4. Riva RY2717 Trim Tab Kit - Wanted for GP800
    By jchale in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 03-02-2009, 05:02 PM
  5. gp800 trim tab instalation
    By dirt2ice in forum Yamaha PWC Performance (2-stroke)
    Replies: 9
    Last Post: 02-10-2007, 01:33 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