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  1. Replies
    11
    Views
    1,099

    Re: Help from the tuning gurus???

    Got home from vacation and finally got around to installing that lighter spring. The pop off measured like 7 psi with the new spring and I thought that was going to be too low but the ski seems to be...
  2. Replies
    14
    Views
    1,855

    Re: Water in Engine 900 zxi

    My experience has also been just pull the plugs and spark arrester lay the ski on its side and pour out the water while rotating the engine by hand. Then spin it with the starter a few times to blow...
  3. Replies
    4
    Views
    747

    Re: JS 550 in salt water? Good or Bad?

    I have a slightly different opinion. I agree salt is corrosive for sure. I have an 88 650 that had a ton of damage from salt when I got it. But that was from 25+ years of use and exposure. I run...
  4. Replies
    11
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    1,099

    Re: Help from the tuning gurus???

    I just checked the pop off with the carb installed and full of gas it poped at 28 psi I tried to check it again but once there wasn't gas in there it popped off a little lower every time.


    Sent...
  5. Replies
    11
    Views
    1,099

    Re: Help from the tuning gurus???

    The kit has three springs and lists two part numbers for Kawasaki applications and one for Polaris but I can't tell which is which. How do I differentiate between the 40gr Kawasaki spring and the...
  6. Replies
    11
    Views
    1,099

    Re: Help from the tuning gurus???

    I think it is genuine. It came on a piece of card stock labeled keihin and had a sudco sticker in the package.

    The carb tuning info I found from group k says if you end up adjusting the low screw...
  7. Replies
    11
    Views
    1,099

    Help from the tuning gurus???

    The carb I am using did not come from a Kawasaki 650. It is a CDK II 38 but from a different machine, Polaris or sea doo I think. Anyway, I put in the spring that matches the spring that was in there...
  8. Replies
    11
    Views
    1,099

    Re: Help from the tuning gurus???

    I can just measure pop off with the carb in place in the ski by blocking the return and pumping into the inlet until the needle opens right? What psi am I looking for?


    Sent from my iPhone using...
  9. Replies
    11
    Views
    1,099

    Help from the tuning gurus???

    I have an 88 650SX
    Stock exhaust
    AM ride plate and intake
    Skat 8-16 impeller
    I just upgraded to a CDK II 38 carb
    I got an intake manifold for the 38 and I bored out a stock flame arrester to...
  10. Replies
    27
    Views
    33,653

    Re: Got in trouble in Wisconsin

    Different scenario but I got a parking ticket while parked legally and out riding my standup. I called the cop that ticketed me and was told that although I was not breaking any laws someone had...
  11. Replies
    13
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    2,450

    Re: Ski died on the river miles from launch.

    Bummed you didn't make it. I saw your earlier posts about this and was pulling for you. Get the ski sorted out and complete your mission!


    Sent from my iPhone using Tapatalk
  12. Replies
    4
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    623

    CDK II 38 jets

    I just picked up a couple CDK II 38's with the hope of putting one on my '88 650SX in place of the stock 28.
    I have read that the stock jets for a 650 should be 140 and 75. Both carbs I got have...
  13. Replies
    9
    Views
    1,363

    Re: wtb stock keihin 38

    Found this that explains the difference between 38 and 40 and the jetting needed for a 760.
    http://www.pwctoday.com/showthread.php?t=415639

    But yeah I am also looking for a stock 38 hopefully...
  14. Replies
    9
    Views
    1,363

    Re: wtb stock keihin 38

    If the OP doesn't grab that single gabagool984 I am interested too. PM'd


    Sent from my iPhone using Tapatalk
  15. Replies
    13
    Views
    1,437

    Re: 650sx and new guy

    Yeah, what Jonny said! It didn't turn my 650 into a rocket ship but it was a noticeable improvement and I think worth the money.


    Sent from my iPhone using Tapatalk
  16. Replies
    13
    Views
    1,437

    Re: 650sx and new guy

    I am 6'4" and 230lb. I cant picture being able to get going in deep water with a foot on the tray. I put one knee up as I hit the throttle and then as the ski gets moving I drag the other leg behind...
  17. Re: '88 650SX carb problems? Runs on squirter only

    I have only used the OEM Keihin kit at the strong urging of several people. I have been told that the other kits are too much trouble and too hit or miss. Keihin kit has a rubber tipped needle.

    ...
  18. Re: '88 650SX carb problems? Runs on squirter only

    My needle stuck open once before I rebuilt my carb and gas was able to flow thru the pump just by gravity and completely fill my crankcase with gas overnight. So I don't think it's necessarily a bad...
  19. Re: '88 650SX carb problems? Runs on squirter only

    Mine runs fine at 130 compression. Mine takes 38 psi thru the fuel inlet to open the needle and let fuel thru. I plug the return port with my finger and pump air in the inlet with a bike pump, it...
  20. Replies
    15
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    4,822

    Re: Operating temp

    Being that there is no thermostat or anything to regulate the flow of cooling water the temp is going to vary depending on the air temp and water temp and engine load. My 650 head stays around 150...
  21. Replies
    850
    Views
    169,485

    Re: The 650sx Brotherhood

    I also collected a half gallon of fuel from the return line while the engine was running and it looks clean and clear.
    And the compression is 130 on my gauge in both cylinders, not perfect maybe,...
  22. Replies
    850
    Views
    169,485

    Re: The 650sx Brotherhood

    HELP. Fuel issue making me crazy today.
    88 650SX
    Rebuilt carb last season with oem keihin kit
    Ran great last year and for the first 6 gal this year
    Today it was running fine then I fell over...
  23. Replies
    850
    Views
    169,485

    Re: The 650sx Brotherhood

    I don't think crankcase drain was a bad idea either. Maybe 30 years later when the rubber dries out, but for reasonable design lifespan it can be a handy thing to have. Same with oil injection. I...
  24. Replies
    850
    Views
    169,485

    Re: The 650sx Brotherhood

    I understand the concept, dump the fuel in without making the engine suck it in. Thereby saving some battery and some starter wear. BUT, and it's a big unpopular but, But I am a believer in the...
  25. Replies
    850
    Views
    169,485

    Re: The 650sx Brotherhood

    That's certainly an option. I like the choke just fine and figure there are plenty of them available here from people who have switched to a primer.


    Sent from my iPhone using Tapatalk
  26. Replies
    850
    Views
    169,485

    Re: The 650sx Brotherhood

    WTB. I am looking for a choke cable for my 88 650SX. Anyone?


    Sent from my iPhone using Tapatalk
  27. Replies
    7
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    1,238

    Re: Replacing Steering Cable Seals

    I bought vacuum caps at the auto parts store and used a punch to make round holes in the tops of the caps. They hold up for a season or so.



    Sent from my iPhone using Tapatalk
  28. Replies
    7
    Views
    1,238

    Re: Replacing Steering Cable Seals

    I bought vacuum caps at the auto parts store and used a punch to make round holes in the tops of the caps. They hold up for a season or so.



    Sent from my iPhone using Tapatalk
  29. Replies
    7
    Views
    1,238

    Re: Replacing Steering Cable Seals

    I bought vacuum caps at the auto parts store and used a punch to make round holes in the tops of the caps. They hold up for a season or so.


    Sent from my iPhone using Tapatalk
  30. Replies
    17
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    2,016

    Re: 650sx Drive Shaft Rattle

    I know several guys with 650 SXs and they all rattle like the pump is broken when out of the water. Unless the noise you are hearing is something new to your machine I would not worry too much. ...
  31. Replies
    17
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    2,016

    Re: 650sx Drive Shaft Rattle

    The splined area of my shaft rattles quite a bit at both ends. It is quiet enough in the water but rattles a lot out of the water. I can feel the play by hand by wiggling the impeller or the shaft...
  32. Replies
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    Re: Operating temp

    Just a quick add in from the peanut gallery.
    The head on my stock 650 runs right around 145-155 degrees. I check every now and then just for a little peace of mind. I have never seen it go over...
  33. Replies
    7
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    910

    Re: Pop off pressure

    Mine never "popped " it holds pressure up to a certain point then it leaks. I call the point it starts leaking the "pop off" pressure.


    Sent from my iPhone using Tapatalk
  34. Thread: LOVE my JS300

    by CGPro856
    Replies
    14
    Views
    2,073

    Re: LOVE my JS300

    I am 230 and my buddy's bone stock 300 is a blast! It takes a while to get up to speed but I can ride it just fine. And it's super easy to toss around and hop little wakes!


    Sent from my...
  35. Replies
    6
    Views
    807

    Re: Flat trailer ski lrotection

    My 650 rides on 2x4's covered with carpet. As long as it's strapped down well it's fine. It takes more of a beating jumping boat wakes than on the trailer I am sure....
  36. Replies
    1
    Views
    631

    Tray mat replacement

    Has anyone tried using the interlocking floor mats they sell at Walmart as a replacement for hydro turf on a standup? For $20 I think I might give it a try.
    ...
  37. Replies
    0
    Views
    371

    WTB. Keihin cdk-II 38. 650sx

    I am still looking for a 91-93 650SX CDK-II carb and flame arrester.




    Sent from my iPhone using Tapatalk
  38. Replies
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    202,920

    Sticky: Re: Vintage Parts Gallery

    http://images.tapatalk-cdn.com/15/08/28/23dad1508c97b9a3601f83777978d980.jpg

    Brrraaappp


    Sent from my iPhone using Tapatalk
  39. Replies
    6
    Views
    1,132

    Re: 650SX Hard to start when warm

    I was told by two different pwc mechanics that it was a waste of time and money to use anything but the keihin brand kit on a keihin carb. They had both had so many problems with AM kits that they...
  40. Replies
    6
    Views
    1,132

    650SX Hard to start when warm

    If it has compression and is getting spark it has to be fuel related. When mine was flooding I could only start it when hot by holding the throttle pinned and cranking it for 20 seconds or so. ...
  41. Replies
    6
    Views
    1,132

    Re: 650SX Hard to start when warm

    When mine did that it was a leaking carb needle. The pressure in the tank created while the engine was running caused it to flood when I shut it off.
    Other than that maybe low compression when it's...
  42. Replies
    4
    Views
    655

    Re: 650sx won't stop.

    The stop switch shorts the black wire to the blue wire from cdi. If the switch is working check the black/yellow wires to ground from the cdi and regulator. ...
  43. Replies
    11
    Views
    1,379

    Re: What does this mean?

    I am happy enough with this for now. I had a richer setting and a ghost white front plug before I flipped the reed pedals. I suspect that new reeds would fix the issue but as I was told in a...
  44. Replies
    20
    Views
    2,195

    Re: 650 SX Plug colors driving me nuts

    My concern is damaging the engine by being too lean in the cylinder with the white plug. Everywhere you look people say "don't be lean" and a white plug means lean.

    I have has the same result...
  45. Thread: 650 head temp

    by CGPro856
    Replies
    2
    Views
    609

    650 head temp

    Anyone ever measure the temperature of the head on a properly tuned 650?

    I have heard touch it for 5 seconds before you have to move your hand. Or as long as water doesn't sizzle. But does anyone...
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