Page 1 of 2 1 2 LastLast
Results 1 to 10 of 17
  1. #1

    Modified GP1200R head gasket

    Can I run the stock head with only a single layer of the stock head gasket? I'd like to do this to raise a little bit of compression as a test/longevity.

    Would a very very thin layer of YamaBond hold it in/on tight?

    Thank you


  2. #2
    Happily Self-Employed WFO's Avatar
    Join Date
    Nov 2005
    Location
    Houston, Texas
    Posts
    12,801
    +1
    450
    I would remove just the center layer of the gasket

  3. #3
    I thought you'd say that Thank you. Do you think only one layer would create leakage or squish issues?

  4. #4
    Happily Self-Employed WFO's Avatar
    Join Date
    Nov 2005
    Location
    Houston, Texas
    Posts
    12,801
    +1
    450
    been there, done that

    squish would be okay, but it will not hold for long

  5. #5
    I am going to get this stock head milled 10thou. its got some visual impurities which I'm sure milling will remove.

    What about YamaBond 4 as an assistant to a single layer gasket? I also heard of folks lightly spraying the single layer with copper such as the following from Permatex. Permatex states on the description said to be good for head gaskets:

    http://www.autozone.com/autozone/acc...ier=520940_0_0_

  6. #6
    mudslanger's Avatar
    Join Date
    Jul 2010
    Location
    Huntsville Al
    Posts
    1,326
    +1
    49
    I have run a single layer gasket a lot and have not had any issues. i have had issues with a warped head and a stripped head bolt that caused a head gasket failure. the spray copper coat works good too to insure a good seal especially if the coating is flaking off the gasket. the best combo in my opinion if you are wanting to run a single layer gasket is to run individual heads with some kind of spray copper coat or gasket coating. lots of things can cause the gasket or gaskets to fail and eliminating those factors will insure a good seal and durability.

  7. #7
    I was doing some reading on this Permatex Copper Gasket spray. Apparently its only for old style non-coated gaskets and not to be used with rubberized/viton coated gaskets like the top and bottom layers of a GP1200r gasket.

    I pulled the middle layer of the stock gasket out which is not coated. I was going to do this anyway to reduce from 3 to 2 layers - but then I thought of another idea. Since the coper coating works for bare metal gaskets I went ahead and sprayed on 2 coats both sides to the center metal gasket layer only. The copper spray recoat is 30 seconds with a dry time of about 5 minutes.

    I then/also used an extremely small amount of Yamabond 4 Marine and extremely lightly coated the cylinder top and head bottom. The amount of Yamabond I used was so little that it really only glazed the surfaces with gray rather than the usually light smear cover. I probably used only 8~10 drops of YamaBond 4 Marine for everything. I put the copper coated stainless layer gasket on the block, and then installed the stock head. 10NM, 20NM, 30NM, then finally 36NM of torque all around in order required. So little Yamabond that it didn't even ooze out.

    I let it all sit/set and dry for about +/- an hour.

    Now I'm seeing 135PSI on all three jugs - which is way more than I've ever seen before.

    I'll post back ride results and/or if this setup fails

  8. #8
    Myself's Avatar
    Join Date
    May 2007
    Location
    North Central Arkansas
    Posts
    2,772
    +1
    129
    I'm interested in the results.

  9. #9
    powerstroke specialist mikegp's Avatar
    Join Date
    Mar 2011
    Posts
    2,529
    +1
    190
    Quote Originally Posted by Myself View Post
    I'm interested in the results.
    results are always the same, water intrusion and burn cylinders with a little rust damage to crank bearings do to water inside the engine for two days.

  10. #10
    Mikegp,

    Have you ever tried with the spray copper and Yamabond 4?

    eric

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Gp1200r head/head gasket
    By NickyDunzo in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 07-29-2012, 05:41 AM
  2. GP1200R head gasket reusable?
    By TX21 in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 07-25-2009, 08:29 PM
  3. Replies: 1
    Last Post: 06-29-2006, 06:25 PM
  4. thinner head gasket wont go on right
    By PAINKILLER in forum 4-Tec Performance
    Replies: 12
    Last Post: 05-15-2006, 08:58 AM
  5. Rotax Racing Head Gasket good or bad
    By Jrsrxp in forum 4-Tec Performance
    Replies: 2
    Last Post: 09-06-2005, 08:33 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
  •