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

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  1. Replies
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    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:
    ...
  2. 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...
  3. 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".
  4. Replies
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    512

    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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    4,478

    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.
    ...
  6. Replies
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    4,336

    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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    550

    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...
  8. Replies
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    432

    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...
  9. Replies
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    3,974

    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
  10. 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.
  11. Replies
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    9,529

    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...
  12. Thread: Js550

    by Bob Gruen
    Replies
    7
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    510

    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...
  13. Replies
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    2,209

    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...
  14. Replies
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    1,643

    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...
  15. Thread: Js550

    by Bob Gruen
    Replies
    7
    Views
    510

    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...
  16. 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,...
  17. Replies
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    584

    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...
  18. Thread: 750 x2 help

    by Bob Gruen
    Replies
    55
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    2,140

    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...
  19. 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...
  20. Replies
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    309

    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...
  21. Thread: 750 x2 help

    by Bob Gruen
    Replies
    55
    Views
    2,140

    Re: 750 x2 help

    Check valve on the tank? Is the tank building and holding pressure?
  22. 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...
  23. Replies
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    681

    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...
  24. Replies
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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
  25. Replies
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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...
  26. Thread: 750 x2 help

    by Bob Gruen
    Replies
    55
    Views
    2,140

    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...
  27. Replies
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    4,478

    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...
  28. Replies
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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...
  29. Replies
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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...
  30. Replies
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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...
  32. Replies
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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.
  33. Replies
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    295

    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...
  34. Replies
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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...
  35. 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...
  36. Replies
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    1,667

    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...
  37. Replies
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    299

    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...
  38. Replies
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    4,478

    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...
  39. Replies
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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
  40. Re: Reattaching Pipe to manifold - whats the secret?

    As far as the large hole in the head pipe: You can certainly leave it stock. "Drying out" a stock pipe involves three steps: sealing and re-drilling a smaller hole, mounting a water fitting on the...
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    1,248

    Re: Pitting on crank, any home fixes?

    ???? You're pulling my chain, right ????

    I was just looking at SBT's website and the pictures they have of a 550 crank appears to have speedy sleeves already on it. Not a ringing endorsement for...
  42. Replies
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    1,248

    Re: Pitting on crank, any home fixes?

    At 1/3" inch wide can you get both rear seals, or just the inner one?

    Bob
  43. Replies
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    1,248

    Pitting on crank, any home fixes?

    Pretty sure I already know the answer to this, but I thought I'd ask...

    Opened up the bottom end of my low hour 550 reed motor to swap in some new crank seals and found that the crank is...
  44. Thread: Sunk

    by Bob Gruen
    Replies
    30
    Views
    1,076

    Re: Sunk

    They have enough foam trapped in the rear hull to stay afloat. A lot of guys remove the hood foam on an X2 to install a surf brace, which is a bit dangerous but probably better than cracking a hull...
  45. Thread: X2

    by Bob Gruen
    Replies
    10
    Views
    678

    Re: X2

    Finally, someone who knows enough to put the graphics on the back!
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