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  1. Replies
    4
    Views
    108

    Re: 1996 Wave Venture 1100 Running Rough

    While you are riding it, or on your trailer?


    Bill M.
  2. Replies
    23
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    1,357

    Re: Question about Cylinder stamp/ head stamp?

    You need to have the Driveline coupler splash guard to prevent
    water from being slung/sprayed into the flame arrestors while you
    are riding.

    It is one possible reason for the water damaged...
  3. Replies
    23
    Views
    1,357

    Re: Question about Cylinder stamp/ head stamp?

    That looks like water ingestion (while the engine was running)
    that eventually seized.

    You need to be sure the engine couplers splash guard is in place.
    If there is an aftermarket flush kit on...
  4. Replies
    5
    Views
    612

    Re: 650sx popup pressure

    Sorry, but that is just bad info from a bad source.


    Bill M.
  5. Replies
    23
    Views
    1,357

    Re: Question about Cylinder stamp/ head stamp?

    If that cylinder head is not flat, that could cause a problem. But those
    cracks are nearly harmless. Cracks that start and end within the water
    jackets will not effect how the engine runs.

    The...
  6. Re: 11/14 Pitch for 760 venture is hurting its top speed

    Checking the carbs is good advice.

    But since it is a Yamaha, I would inspect the low speed (pilot)
    screws. Yamaha's have problems starting and so people lower
    the pop-off or will turn out the...
  7. Replies
    23
    Views
    1,357

    Re: Question about Cylinder stamp/ head stamp?

    Did you have your new head remachined for more compression?

    And if so, how many psi is it supposed have?

    Do you know how many cc's were removed?


    Bill M.

    Head cracks are very unusual for...
  8. Replies
    3
    Views
    370

    Re: Kawasaki 750 X2 Swap Blown Head Gasket

    I didn't see a blown head gasket.

    But the Group K porting can create problems with your pipe
    and impeller choice.


    Bill M.
  9. Replies
    8
    Views
    368

    Re: starter turns in bursts

    The starter bendix used to be a common repair for early SeaDoo's.

    The engine would turn over as normal, and then the starter
    would disengage.

    Bill M.
  10. Replies
    8
    Views
    368

    Re: starter turns in bursts

    Try removing the gray pto cover and spark plugs. Try to turn the engine
    over by hand in both directions ~180 to 360 degrees.

    You are testing for something that is binding the engine. It could...
  11. Replies
    5
    Views
    212

    Re: Kawasaki 750 SX: What does this Spring Do?

    Jet Ski's do not require a spring because of the jet ski's center of gravity,
    the jet ski is unstable after the rider falls off, and so it plows the nose
    and starts to circle.

    But carb...
  12. Replies
    19
    Views
    4,336

    Re: 1100 ZXI Dies after 10 minutes

    To test the spark, any equivalent to the NKG B8ES will do.

    I believe that part number has been replaced, but it was
    just a generic medium heat range spark plug with no resistor.
    If you can not...
  13. Replies
    19
    Views
    4,336

    Re: 1100 ZXI Dies after 10 minutes

    That could be normal if you are testing with resistor spark plugs.

    First pull the spark plug caps and spray the inside of the caps, and the spark
    plugs with brake cleaner to wash out any...
  14. Replies
    1
    Views
    184

    Re: 1992 Kawasaki 750 ss idle issue

    The most likely cause is a vacuum leak at the carb base gasket.
    But the vacuum leak could be anywhere on the intake, main seals,
    or poor manifold vacuum caused by rusted cylinders.

    The engine...
  15. Re: kawasaki 650 -surging after running for an hour then quitting

    The only printed information for testing the stator and CDI tests
    the resistance (Ohm Test). Even though that is what is in the manual
    Kawasaki recommended to it's dealers to use a different test:...
  16. Replies
    29
    Views
    1,222

    Re: 650sx best mods for low end

    You made a poor choice.

    In order to avoid costly repairs, you need to recognize a problem.

    In this case your impeller and possibly your installation is the problem,
    not the cooling system.

    ...
  17. Thread: alot of x2 pics

    by wmazz
    Replies
    1,891
    Views
    513,017

    Sticky: Re: alot of x2 pics

    Sunkist

    569697
  18. Replies
    29
    Views
    1,222

    Re: 650sx best mods for low end

    Pick an impeller and build around it.

    There were 3 generations of Skat Trak 650 impellers. The first two
    generation impellers contributed to many limited, and mod 650's seizing
    while doing a...
  19. Replies
    16
    Views
    1,653

    Re: 951 porting advice

    Free Porting works because cylinders tend to allow fresh fuel-air
    mixture to escape out through the exhaust port before it closes.
    There is more than one way for this to happen. Generally it is ...
  20. Replies
    16
    Views
    1,653

    Re: 951 porting advice

    YUP, I disagree.

    My old super cylinder was free ported, but it is dangerous.
    OK to discuss theory. But if you are not familiar with it, just a
    little too much free porting, and our diaphragm...
  21. Replies
    22
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    818

    Re: Mikuni TMX triple?

    It would not be difficult to make your own 1 into 3 splitter and
    order 4 throttle cables, or maybe your local HD shop can make
    them.


    Bill M.
  22. Replies
    29
    Views
    1,222

    Re: 650sx best mods for low end

    I am curious which head you are using and the compression
    that you have measured?

    Hopefully it isn't a Ocean Pro head. The really bad 650 head
    set-up was an OP head and a .040" head gasket....
  23. Replies
    22
    Views
    818

    Re: Mikuni TMX triple?

    I see a potential problem for the TMX carb at a constant wot
    operation. No primary choke (replacement parts). Is it part of
    the casting like the early Keihin flat slides?

    The original Mikuni TM...
  24. Replies
    22
    Views
    818

    Re: Mikuni TMX triple?

    Mikuni used to make a cable actuated choke to replace the
    hand operated choke (enrichment valve).
  25. Replies
    22
    Views
    818

    Re: Mikuni TMX triple?

    Do it like Kawasaki did for the H1, H2. A single throttle cable into a
    3 way splitter. Try Terry Cable, they should be able to fabricate one.

    Next you will need to synchronize all 3 carbs at...
  26. Replies
    29
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    1,222

    Re: 650sx best mods for low end

    The TS exhaust manifold has a diverter similar to an aftermarket
    exhaust manifold.


    Bill M.
  27. Replies
    29
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    1,222

    Re: 650sx best mods for low end

    Add a TS650 exhaust manifold to your set-up.



    Bill M.
  28. Replies
    5
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    612

    Re: 650sx popup pressure

    No.

    Do you have a jet ski trailer? If so you can test it while it is on the trailer.

    If the engine just doesn't want to make rpm, look for an exhaust or
    fuel leak.

    How does it run with...
  29. Replies
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    Views
    7,649

    Re: Check out this cylinder failure. 720

    The text below was copied from the Sea Doo 2002 One Day School book.
    Page 4-24.

    The page I quoted from had 4 views of the piston, top, bottom, exh skirt,
    and intake skirt.

    Failure type:...
  30. Replies
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    7,649

    Re: Check out this cylinder failure. 720

    So o-rings are in a category by them selves, and do not act like gaskets?

    And what do you tell your customers, "your engine is going to fail eventually
    because the o-rings are designed poorly"...
  31. Re: Help Troubleshooting: 440 and 550 won't start when hot unless throttle opened ful

    The return line on the 38bn 440 & 550 uses a banjo bolt for the restrictor.

    Remove the banjo bolt, and turn it upside down. Either there will be a small
    hole for the restrictor, or about a 1/8"...
  32. Re: 97 Seadoo GTI: Starts/Idles Great, Does Not Accelerate

    That engine is really loaded up! sounds like it is only hitting on one
    cylinder and there is water mixed with the gasoline on the spark
    plug.


    In the video at ~13 seconds, you close the...
  33. Re: Help Troubleshooting: 440 and 550 won't start when hot unless throttle opened ful

    There is supposed to be a restriction in each carbs return line.
    Each carb is nearly plugged off at idle because the restriction
    is only .013".

    But if your 440 has a 38mm 550 carb, the...
  34. Replies
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    7,649

    Re: Check out this cylinder failure. 720

    Head gaskets don't blow for no reason, and after a head gasket
    fails, that reason continues to cause damage.
  35. Thread: Minty 550sx

    by wmazz
    Replies
    11
    Views
    1,199

    Re: Minty 550sx

    A 1/2 pipe (Coffman's), 17 degree impeller (I don't know if you can find one,
    but the extra pitch on a great torque pipe like a Coffman is really fun) and a
    38, 40 (sbn-i), or 44 mikuni sbn just...
  36. Replies
    3
    Views
    678

    Re: 640 crank shaft centre seal

    That's for dam sure. Unfortunately, my suggestions are difficult
    and time consuming to say the least.

    Most manufactures use a mechanical "labyrinth" seal there,
    it might be possible for you to...
  37. Replies
    39
    Views
    7,649

    Re: Check out this cylinder failure. 720

    If the water source was an O-ring, there would be no water
    damage to the piston skirts. Instead the cylinder would have
    seized from detonation.


    Bill M.

    Engines without dykes rings would...
  38. Re: Ski dies if let of throttle… easily starts again

    Sounds like the idle adjustment is set too low.

    Jet ski's need a slow idle, ~1000 rpm in the water so that
    it will circle easy.


    Bill M.
  39. Re: A car mechanic gets busted for a 148mph street race driving a customer's Corvette

    I posted this because it reminded me of the old days when taking
    a customers motorcycle out for a lunch run was normal practice at
    dealerships.

    Two customers who brought their bikes in for a...
  40. A car mechanic gets busted for a 148mph street race driving a customer's Corvette.

    From AutoBlog.com

    Over the weekend, as GM Authority reported, a 2021 Chevrolet Corvette owner in the San Francisco Bay
    area took his car to a regional dealer for an engine issue. He'd waited...
  41. Re: 97 Seadoo GTI: Starts/Idles Great, Does Not Accelerate

    Would you elaborate?


    I didn't hear a dead hole while it was cranking over in the video.




    No.
  42. Replies
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    1,048

    Re: 2004 Waverunner 800XLT

    If you were holding it in your hand, the lowest connector is
    the fuel in, and the highest connector is the return line.

    Pulse is usually in the middle, and attached to a fuel pump.


    Bill M.
  43. Re: 97 Seadoo GTI: Starts/Idles Great, Does Not Accelerate

    That problem effected twin carb engines, not single carb engines.

    They might have the same clearance specs, but the excessive
    clearance only caused problems with the dual carb engines.



    ...
  44. Thread: Sxr 1100 jetting

    by wmazz
    Replies
    15
    Views
    1,263

    Re: Sxr 1100 jetting

    When a carburetor doesn't transition from the low circuit to the
    high speed circuit, that can be caused by the wrong spring rate.

    It is an example of what happens when the pop-off is too high. An...
  45. Thread: Sxr 1100 jetting

    by wmazz
    Replies
    15
    Views
    1,263

    Re: Sxr 1100 jetting

    Did you recently rebuild the carbs with Chinese kits?

    Do they still have the stock springs?


    Bill M.
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