Results 1 to 3 of 3

Thread: GPR Tab spacing

  1. #1
    mrbtd's Avatar
    Join Date
    Jul 2005
    Location
    Lindenhurst, Illinois, United States
    Posts
    4,309
    +1
    2

    GPR Tab spacing

    I was looking at my tabs tonight and found some oddities on the spacing from front to back and side to side.

    Are there optimal measurements ? Does it matter which tabs i.e. stock/shortened/extended.


  2. #2
    Moderator RX951's Avatar
    Join Date
    Apr 2005
    Location
    League City, Texas
    Posts
    16,066
    +1
    23
    * when you say oddities, are these measurements you are finding by measuring with a digital caliper ?

    * it depends on how much spacing there is by how you are tuning in your handling. Typically, washers are added to control porpoising and add lateral stability.

    * the aftermarket R&D tabs have extensions on them to add more stability in rough water. These extensions entend the hull length which in turn will put more of the nose in the water (reduce lift)

    * some people "cut" the extensions off and imitate the stock length of the OEM tabs.

    * some people also run the OEM tabs and add washers to them.

    * the aftermarket R&D tabs are thicker than the OEM tabs by roughly .110 if memory serves right.

    * some people will also take the tabs off all together.

    * It all depends on what you are attempting to gain
    i.e.) more stability, more top end, more rough water control ect.....

    * also look too, the OEM tabs are not "flat". They are tapered thinner toward the inside of the hull. the outer edge of the tabs are thicker than the inside edge.

  3. #3
    mrbtd's Avatar
    Join Date
    Jul 2005
    Location
    Lindenhurst, Illinois, United States
    Posts
    4,309
    +1
    2
    Quote Originally Posted by RX951 View Post
    * when you say oddities, are these measurements you are finding by measuring with a digital caliper ?
    Yes - From the hull to Front of the tab I get 10.83mm on one side and 11.4 on the other. I am measuring from the furthest outside point.

    I am also getting different measurements from side to side on the ride plate.

    I keep thinking it should all be straight under there mine is definetly not centered. I have shortened R&D tabs on there now that are polished. It may be in the tolerances of the Tabs.

    I know I have read somewhere about opening up the tab mounting holes a little.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. WTB WTB: Stock GPR Tabs...
    By richdash in forum Yamaha Classifieds
    Replies: 3
    Last Post: 08-03-2010, 06:12 AM
  2. FS: GPR tabs/ Riva & R&D IR plates
    By codymouse54321 in forum Yamaha Classifieds
    Replies: 3
    Last Post: 09-16-2008, 10:25 AM
  3. Riva GPR tabs
    By Duke in forum Yamaha Classifieds
    Replies: 0
    Last Post: 09-02-2008, 04:24 PM
  4. Ride Plate / Trim tabs Spacing ?????
    By MIARider in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 03-04-2008, 12:02 PM
  5. GPR Trim Tab Question
    By CrazyA in forum Yamaha PWC Performance (2-stroke)
    Replies: 9
    Last Post: 10-08-2007, 10:56 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
  •