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Type: Posts; User: Bob Gruen; Keyword(s):

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  1. Replies
    880
    Views
    360,271

    Re: POST YOUR CUSTOM PAINT

    Back in High school / College:

    557358 557359
  2. Replies
    12
    Views
    2,648

    Re: Side exhaust relocation

    Even when they made them they never took the inside appearance into consideration. I think you are asking for something you'd be disappointed in anyway.

    Bob
  3. Replies
    7
    Views
    1,615

    Re: 85 JS550 Dual SBN 38 Set Up.

    The way those carbs should be set up the carb with the pump should have it's restrictor drilled out and the other carb should have it intact. This is designed to keep the fuel pressure even in the...
  4. Replies
    6
    Views
    2,274

    Re: X2 dual cooling thread #1243

    If you are in Cancun you are probably in pretty warm water. You would be better off running both lines into the engine.

    Most people just bodge these things together, and it looks a mess and can...
  5. Replies
    13
    Views
    2,245

    Re: 1985 JS550 PP Motor Failure

    Are you sure you don't have an air leak at the rear seals? More times than not a rear cylinder failure is due to an air leak at the rear crank seals. Did you do a leak down test after the failure?...
  6. Replies
    39
    Views
    6,814

    Re: Kawasaki 550,650,750

    I'm in the market for a Supretrapp waterbox (rubber boot quality is really important of course). Also might be interested in an aluminum charging flywheel for a 650.

    Bob
  7. Thread: 650 Porting

    by Bob Gruen
    Replies
    39
    Views
    10,112

    Re: 650 Porting

    I know this is an old thread, but I'd like to understand this 70% rule: is it 70% of the bore diameter as measured in the round cylinder with calipers, or as drawn out on a flat template? Putting...
  8. Replies
    13
    Views
    1,976

    Re: (JS550) What Pipe Yields Big Screamy??

    Loud skis get our sport banned. A ton of places I used to ride have been fenced off as 'parks' to effectively close off access to Jet Skis.
  9. Replies
    7
    Views
    1,850

    JS650 conversion with a 440 pump and drive

    I saw a complaint on a Facebook group from a guy that said he couldn't keep bearing in his 440 drive line. He claimed that his hot motor was just too much for them and he had to swap them out for...
  10. Replies
    7
    Views
    2,545

    Re: X2 Tubbies with side exhaust

    Stock position really hurts left turns. Simply moving it to the nose is better than adding tubbies.
  11. Replies
    7
    Views
    1,401

    Re: 750 conversion questions/input

    135 Main and 1 & 1/2 turns
    72 Pilot and 1 & 3/4 turns
    50 Middle jet
    Pop Off 26 lbs

    These are the stock jets and even switching to a much bigger pipe (FPP Blaster) and a 2" exhaust system all I...
  12. Thread: x2 refresh

    by Bob Gruen
    Replies
    22
    Views
    3,623

    Re: x2 refresh

    The fuel restrictor is drilled out on the carb with the pump but in place on the carb without the pump. This eliminates pump pressure as a variable between the two carbs. No need to run an...
  13. Re: 93 Kawasaki x2 big pin 750 bogs when giving throttle

    My 750 Small Pin settings are OEM, even though I have a lot of mods. Notice how high the pop-off is for a Keihin. I'd start by opening up the carbs, checking the pop-off, and seeing what sizes your...
  14. Replies
    4
    Views
    517

    Re: Keinin cdk2 L and H only turn one 1/4.

    Look at Post #12: 750 X-2 Rebuild
  15. Replies
    30
    Views
    20,179

    Re: Rebuild: 2 550SXs

    Like a lot of us I have a perm magnet aftermarket starter. They work well, but they have a bit of a defect in that they are not sealed well. If your ski ever 'sinks', water will probably intrude...
  16. Replies
    10
    Views
    1,293

    Re: New to jet skis

    If you have a set of jumper cables that are small enough to get into your engine bay then you can jump it off of your car to see if your Jet Ski battery is your issue.

    Also, there are three seals...
  17. Replies
    20
    Views
    2,019

    Re: hooker 10/16 for modded 750

    10/16 has proved to not have enough pitch for my 750 small pin. I have dual Keihins, Factory Pipe Blaster Chamber, and a full 2" system. Also running the small pin CDI which has a lower rev limit...
  18. Re: SXR or Blaster limited chamber, 3 gallon tank?

    I did a Blaster Limited chamber with a TDR water box and all I had to do was mildly dent the chamber and mod the hood. It is in my build thread which you can find in my sig.

    Bob
  19. Re: Anyone have an extra Coffman’s 650 chamber?

    I have this:

    546123

    It has the formed stainless head-pipe so I am guessing it is first gen(?). The head-pipe has a pinhole right above the manifold interface that would need to be welded. This...
  20. Replies
    18
    Views
    1,708

    Re: WTB 1994/95 X2 Water box

    FYI, The 2" TDR Waterboxes are drop in replacements, but you would still need the OEM Styrofoam mount or to custom mount using the older rubber mounts (like I did). If you opt for the TDR stay away...
  21. WTB: Ocean Pro Holeshot Nozzle for JS550SX or JS440

    Looking for a Ocean Pro Holeshot (big bore) nozzle for the JS550SX pump. I'd also consider swapping out the OEM pump for a 440 pump & drivetrain, so I'd consider that nozzle too.

    Thanks,

    ...
  22. WTB: Jet Dynamics ride plate for Kaw 550

    Hoping to save a few bucks over the cost of a new one.

    Bob
  23. Replies
    2
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    638

    Re: 440/550 Parts

    How much are you asking for the blue ride plate?
  24. Replies
    12
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    1,457

    Re: 650sx with a 750 questions

    For the exhaust (when he has more money): Cut the exit end off of the stock pipe's stinger and have a 2" end welded on. Replace the OEM waterbox with a 2" TDR that you offset for stainless mandrel...
  25. Re: Top Side Paint or Gel Coat, What is safe to get away with???

    Rust-Oleum "appliance epoxy" (which is just enamel) is cheap and good way to match the Kawasaki white Imron paint. Not sure if it will match Yamaha white well, but the "Appliance Epoxy" is easy and...
  26. Replies
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    20,179

    Re: Rebuild: 2 550SXs

    Jafaboy,

    Great pics! It should be noted that the steering cable tube is pretty darn thick, even it you graze it with the toothed stainless tube you are not going to punch a hole in it. (See post...
  27. Replies
    25
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    3,912

    Facebook vs. Forums

    As a Facebook user and a member of many different online forums (PWCToday, diyAudio, Pelican Parts, WranglerForum, etc), I am surprised how many people don't get the difference. They see the two...
  28. Replies
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    6,194

    Re: 650sx cooling lines

    If you have two lines going into your exhaust manifold than you should have two lines coming out of your head. You can add a 2nd fitting to the existing plugged tap on your head and dump it overboard...
  29. Replies
    31
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    6,194

    Re: 650sx cooling lines

    This, and the paint on your headpipe, seem to indicate that you have major cooling issues. The ski is modded and depending on the water temps you ride in you may need a cooling upgrade to flow more...
  30. Replies
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    8,414

    Re: Craziest x2 exhaust setup?

    Not crazy at all, That's the best way to get 'er done on an X2.
  31. Replies
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    1,036

    Re: Gp760 potential purchase

    A quality galvanized double trailer are $800 minimum, painted depends on the condition.

    The GP760 depends on your skills, the value of your time, and the condition of the hull and drive:
    ...
  32. Feedback on the Latest JS hull handeling aids...

    So I am considering adding one of the latest handling aids for my 550SX. The boat is primarily just a 'fun' boat for both me and my friends (some of which are newbies), but the guys I ride with are...
  33. Re: There is a chrome add on that will fix all the broken photobucket hot links

    Just added the Firefox Add-On, works for me now as well. "Photobucket Embedded Image Fix".
  34. Replies
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    1,412

    Re: so i bought a 1989 650sx

    BN carbs are not junk. Every carb ever used on a PWC has had idiosyncrasies, and sometimes it is hard to even identify the type of carb that you are dealing with because although they look the same...
  35. Replies
    30
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    20,179

    Re: Rebuild: 2 550SXs

    (Mostly) Finished.

    Just want to bend the handle bars, put new grips on it, and install a quick steer. I don't think it will be ridden enough to justify spending any more money on it than that.
    ...
  36. Replies
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    16,372

    Re: 750 X-2 Rebuild - Yamaha fuel filler

    Most people hate the X-2's fuel door; some of us hate it enough to change it. Every once in a while WB1994 makes a run of X2 external filler plates that mimic the contours of the Yamaha hull's fuel...
  37. Replies
    12
    Views
    1,731

    Re: 88 JS550 Start before rebuild?

    Running it no-load won't prove a whole lot. Even weak spark or other wonky ignition problems may not be evident until you actually splash it.

    I'd actually suggest you open the bottom end without...
  38. Replies
    4
    Views
    1,402

    Re: Kawasaki x2 exhaust outlet relocation

    You can look at my build thread and the "Blaster Pipe Basics" thread for details on my X2. Garrcass made a handful of 2" "Johnny X2" style exhaust hull fittings. It works pretty good, but I think he...
  39. Replies
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    13,903

    Re: 701 motor how much power potential

    I have everything described above but the MSD enhancer, and I rode a modded Kaw 900 and it was incredible. The heavy motor improves the handling and the extra power is arm wrenching.

    Bob
  40. Re: Should I use a battery maintainer over the winter?

    If it is a "float" maintainer, yes. B&D is not the greatest brand. I rotate a .8 amp Battery Tender between 4 skis, and I really should get a second one.
  41. Replies
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    20,100

    Re: 750SX re-homing, pic heavy

    I have had good results with the following method:
    * Clean out the fiberglass with lacquer thinner, cutting out loose bits or parts that do not lay flat. Leave enough in place to guide your...
  42. Thread: Js550

    by Bob Gruen
    Replies
    7
    Views
    1,231

    Re: Js550

    If it has a stock head, then 120 psi is really good. I have a reed engine with a Newmiller recreational milled head @168psi. Of course you can't tell that it is milled, it just looks like a stock...
  43. Replies
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    3,809

    Re: x2 750 wan't more low end

    There are two types of timing plates, one is fixed with holes while the other is adjustable as it is slotted. If you just want more low end power, remove the advance timing plate, you'll loose top...
  44. Replies
    15
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    10,405

    Re: X2 across te front of a trailer.

    I bought a longer galvanized tube for the stiffening brace. Now the brace is definitely put under a bending moment and therefor contributes more to stiffening the A frame section.

    531428

    Detail...
  45. Thread: Js550

    by Bob Gruen
    Replies
    7
    Views
    1,231

    Re: Js550

    Depends on the state of the rest of the ski. Compression is a good indicator, but there are a whole host of things that wear out and must be tended to. Crank seals, impeller, pump housing, etc. $450...
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