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

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  1. 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...
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    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...
  3. Replies
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    1,043

    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...
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    854

    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...
  5. Replies
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    854

    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...
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    2,599

    Re: Craziest x2 exhaust setup?

    Not crazy at all, That's the best way to get 'er done on an X2.
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    513

    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:
    ...
  8. 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...
  9. 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".
  10. Replies
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    632

    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...
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    5,568

    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.
    ...
  12. Replies
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    5,175

    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...
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    844

    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...
  14. Replies
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    674

    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...
  15. Replies
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    5,098

    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
  16. 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.
  17. Replies
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    11,529

    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...
  18. Thread: Js550

    by Bob Gruen
    Replies
    7
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    587

    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...
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    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...
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    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...
  21. Thread: Js550

    by Bob Gruen
    Replies
    7
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    587

    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...
  22. Re: Kinda disappointed with a heavily modified 750

    I am a firm believer that the 750 engine needs a full 2" exhaust system to get the most out of it. This means: FPP Blaster Limited Pipe, 2" TDR baffled water box, and a custom 2" thru hull fitting,...
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    Re: 650 X2 carb at 5 turns out???

    3 turns out is max; any more than that and 1) you are not actually increasing the fuel flow, 2) the spring tension will not hold the screw and it may back out further on it's own.

    It sounds like...
  24. Thread: 750 x2 help

    by Bob Gruen
    Replies
    55
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    2,413

    Re: 750 x2 help

    Plug wires go bad and can act up under an increasing load. If both carb configs behave the exact same way I'd suspect ignition. Maybe one lead is dropping out, which would be easy to spot on the...
  25. Re: Looking for x2 or stand up riders in central Florida to ride with.Lakeland Winter

    I *might* be moving back to the Sarasota area in the near future...
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    Re: bilge pump kit 550 SX

    I never found a kit that was worth a darn.

    It will function better (and actually look cleaner) if you glue the pump to the lowest surface of the hull. Brackets generally hold the base 3/4" above...
  27. Thread: 750 x2 help

    by Bob Gruen
    Replies
    55
    Views
    2,413

    Re: 750 x2 help

    Check valve on the tank? Is the tank building and holding pressure?
  28. Replies
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    Re: First Stand Up Ski

    I know of no problems with using a garden hose; you definitely want to run the hose wide open. What you do not want to do is let the hose run while the engine is off. If you leave it long enough it...
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    Re: X2 project for over winter

    I really like the SXi OEM Keihin dual 40s. They have an undeserved bad reputation, so you can find them used pretty cheap. They work really well with the stock jetting:

    135 Main and 1 & 1/2 turns...
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    Re: X2 fuel door fill

    I have one for sale (snafu, my fault; ended up with 2, only need 1). $50 + shipping.

    530510

    Bob
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    Re: Another Blaster Build

    True statement. After going from my 701 to a friend's modded 900 I can say that the extra weight, along with the extra power, really does improve the handling. When getting back on a 2 cylinder the...
  32. Thread: 750 x2 help

    by Bob Gruen
    Replies
    55
    Views
    2,413

    Re: 750 x2 help

    Are you sure you do not have any exhaust leaks?

    Did you ever put a new check valve on the tank? You can usually get a Yami check valve from ebay for 1/2 the price of a Kawi. Your tank should hold...
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    Re: Rebuild: 2 550SXs

    My high school boat had an Ocean Pro piston port block with twin 38s, various pipes, gutted stock water box, and a 440 pump with an Ocean Pro big bore nozzle. It used to tug hard when you pulled the...
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    Re: Rebuild: 2 550SXs

    First ride impressions:

    I have not ridden a pole ski / 550 in 20 years, and I'm used to forcing a Blaster or X2 over on their sides to carve a turn, so getting back into the balance of a pole ski...
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    Re: Rebuild: 2 550SXs

    The ski is back together and finally running. I sent the head and flywheel off to Newmiller, pics of the flywheel lightening below. Because the yellow zinc coating is machined away it is a good idea...
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    Re: JS550 two skis - Which Carb is What

    I think that is the inner boss that the older design plastic nipple is molded around. The plastic nipple would break off, leaving behind the inner structure that you still could zip tie the hose to...
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    Re: Will an exhaust make a difference?

    Don't run it. That is a high RPM pipe meant for a 440 which has smaller pistons so it can rev to higher RPMs. Even full mod 550s needed a longer pipe that what you posted. You are better off keeping...
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    Re: 650 Conversion Ski - Lorde mount

    When you tapped it, did you keep it metric or convert to standard? Metric threads are finer and don't back out as easily.
  39. Replies
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    Crank seals outer edge

    How are people handling the outer edge of the crank seals? Tearing down my engine has shown some corrosion and seal failures at the outer edge of the seals. Possibilities:



    Dry - Factory OEM...
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    Re: 650sx, engine fried??? Just bought ski

    The pitting on your head will be a problem, could cause predetonation. It will need to be resurfaced and re-shaped. If you insist on just putting it back together for the season take some fine grit...
  41. Re: Jetting Guru's! Dual 3 jet Keihin CDK2 40's help!

    The carb throats are very different, so I would not try to correlate jets between brands (or sizes).

    My own experience with the Keihins was that I increased the jet size from stock when I went to...
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    Re: 1986 JS550/750 Conversion Build

    The JS hull gets unstable around 45mph. The topic has been discussed at length here on the forum, but in a nutshell the flat section in front of the pump is a bit too wide and it lifts the bulk of...
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    Re: Duel cooling question?

    Not a must, but even if both taps on the pump are connected it will only flow as much as the head will let out. In effect you would be down to single cooling.

    A drill, a tap, and a fitting and...
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    Resealing the Motor

    Now that everything is back together I decided to re-seal the motor. Although the motor looks great from the outside, it is a '92 and appears to be factory sealed. As an upgrade, I bought 3 OEM...
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    Re: Pitting on crank, any home fixes?

    I just ordered 2 SKF Speedi Sleeves. I'll document the installation and my impressions in my 550 build thread.

    Bob
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