Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 22
  1. #1
    Robsauto2's Avatar
    Join Date
    Aug 2005
    Location
    Oceanside, CA.
    Posts
    774
    +1
    7

    Need some help with gas valves

    OK, so I have the motor out and apart and looking at stuff, I notice the gas valves are leaking oil quite a bit. So i searched the site to learn more about these and saw a post that says the green bellows and red springs are for a triple pipe setup. Well I am single pipe with green bellows and red springs.

    When I first installed these 2 years ago I had a hard time tuning them. It would bog real bad until I turned the red caps in and went out 1-1/2 turns. Any more out and it would bog. I am thinking the valves are not opening all the way and this is why I cannot rev past 7000 rpms. I do have holes in the covers to see how far they open and THOUGHT they were fully open, but now looking close at them on the bench, I don't think they were.

    So my questian, what combo spring/bellows are you guys having good luck with? Also, where can I find part numbers for these parts?

    Thanks again guys for your help!


  2. #2

    Join Date
    Jan 2006
    Location
    Texas City, Texas
    Posts
    1,249
    +1
    15
    The green bellows and I believe the thin red springs are Sea-doo parts. (The thick red springs are Yamaha's). They have worked well for me. I have a single pipe set up.

    If your gas valves are leaking oil into the valve assembly and onto the caps... well that would be a place that you could loose a lot of rpms. I've lost 150 there before. At the time I cleaned them all up, used these special tie wraps that Razzbo and Fernando recommended, and after the valves were properly resealed, the rpms went back up.

    Now I use copper wire double wrapped to seal the bellows onto the caps.
    Last edited by salty; 08-11-2007 at 11:17 PM.

  3. #3
    Robsauto2's Avatar
    Join Date
    Aug 2005
    Location
    Oceanside, CA.
    Posts
    774
    +1
    7
    Quote Originally Posted by salty View Post
    The green bellows and I believe the thin red springs are Sea-doo parts. (The thick red springs are Yamaha's). They have worked well for me. I have a single pipe set up.

    If your gas valves are leaking oil into the valve assembly and onto the caps... well that would be a place that you could loose a lot of rpms. I've lost 150 there before. At the time I cleaned them all up, used these special tie wraps that Razzbo and Fernando recommended, and after the valves were properly resealed, the rpms went back up.

    Now I use copper wire double wrapped to seal the bellows onto the caps.

    Thanks Salty, I went and measured the thickness of the springs and they are .044". So where do you get the wire at?

  4. #4
    philip_gpr's Avatar
    Join Date
    Dec 2005
    Location
    Canada
    Posts
    2,724
    +1
    3
    if you remove the springs and ride the valves will be fully open - this way you can record your rpms at WOT with the valves open

  5. #5

    Join Date
    Jan 2006
    Location
    Texas City, Texas
    Posts
    1,249
    +1
    15
    [QUOTE=So where do you get the wire at?[/QUOTE]

    Home Depot. It's used to hang pictures.

  6. #6
    Robsauto2's Avatar
    Join Date
    Aug 2005
    Location
    Oceanside, CA.
    Posts
    774
    +1
    7
    Quote Originally Posted by philip_gpr View Post
    if you remove the springs and ride the valves will be fully open - this way you can record your rpms at WOT with the valves open


    I will try that on the next ride Phillip, thanks.

  7. #7
    Robsauto2's Avatar
    Join Date
    Aug 2005
    Location
    Oceanside, CA.
    Posts
    774
    +1
    7
    Quote Originally Posted by salty View Post
    Home Depot. It's used to hang pictures.


    Cool, do you use a special twist tool or just plyers?

  8. #8

    Join Date
    Jan 2006
    Location
    Texas City, Texas
    Posts
    1,249
    +1
    15
    Flat pliers.

    Start with about 18 inches of wire... extra length to work with.
    Make sure that you double wrap the wire around the valve and twist the ends at least 5 times. The black cap will interfere with the up and down travel of the gas valve where the wire sticks out the gas valve assembly once the cap is secured. You must trim the black cap in the shape of a half moon so that the twisted wires can stick out of the assembly and travel freely.

    Some people have chosen stainless wire, but I use copper because it is easier to bend.

  9. #9
    XL1200Ltd-Keith's Avatar
    Join Date
    Aug 2005
    Location
    Arizona
    Posts
    506
    Gas Valves Leak Fix

    (by Jonny5)


    This is how I have been running my gas valves for the last couple years:

    #1 I think it's 16g wire.... wrap it twice, give your self enough wire to work with this will make it easier.

    #2 Twist the two ends and pull snug..."don’t make it to tight or it will work it's way thru the bellow".

    #3 In my picture you can see the bellow being pushed over and this is a little to tight...to give you an idea.

    #4 Do about 5 to 6 twists and cut to about 1/8th of an inch.

    #5 Sometimes I might use a screwdriver to push the knot closer to the bellow. If it sticks out to far sometimes I just redo it (wire is cheap).


    Make sure it moves freely

    Hope this helps...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Power Valve Bellows.jpg 
Views:	37 
Size:	88.9 KB 
ID:	34809   Click image for larger version. 

Name:	Power Valve Bellows (1).jpg 
Views:	41 
Size:	96.4 KB 
ID:	34810   Click image for larger version. 

Name:	Power Valve Bellows (2).jpg 
Views:	42 
Size:	103.9 KB 
ID:	34811   Click image for larger version. 

Name:	Power Valve Bellows (3).jpg 
Views:	49 
Size:	100.1 KB 
ID:	34812   Click image for larger version. 

Name:	Power Valve Bellows (4).jpg 
Views:	40 
Size:	84.8 KB 
ID:	34813   Click image for larger version. 

Name:	Power Valve Bellows (5).jpg 
Views:	46 
Size:	89.9 KB 
ID:	34814  


  10. #10
    spud's Avatar
    Join Date
    Jul 2006
    Location
    Oceanside, California
    Posts
    1,347
    +1
    2
    Rob,

    Rpm's are down this weekend with the high temps 112° and the humidity. My hotrod was only turning 7050

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. Need help with Gas Valves.
    By Yellow93 in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 03-27-2010, 09:47 PM
  2. need some help with minor hull repair
    By stingray152003 in forum Yamaha Open Discussion
    Replies: 15
    Last Post: 02-01-2008, 07:52 AM
  3. Need some help with a 650 LX
    By utahnewbie in forum Yamaha How To & FAQs
    Replies: 0
    Last Post: 05-04-2007, 11:59 PM
  4. I Need Some Help With My Shark !!!!!!
    By sleblanc in forum Polaris Open Discussion
    Replies: 9
    Last Post: 12-20-2006, 03:17 PM
  5. Need some help with adjust a thrust
    By AaronC in forum 4-Tec Performance
    Replies: 6
    Last Post: 10-10-2006, 06:09 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
  •