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  1. Replies
    12
    Views
    399

    Re: Did I just cook my engine?

    May have been caused by a by a big end bearing thrust washer.

    There is a lot of scratching and dark spots inside the cylinders? It is hard
    to tell if is old rust damage or something new.
    ...
  2. Replies
    10
    Views
    313

    Re: 750 sxi water injection

    I purchased 1 just like that on ebay, and another that maybe better.
    But I don't know if it is exactly the same.

    Mine are:
    1/4" pipe fittings
    Stainless Steel
    12V DC
    Normally Closed

    I...
  3. Replies
    13
    Views
    399

    Re: Throttle linearity

    If that is what she was comfortable with, why not put the 550 back
    to stock, stock compression is 125psi, and add a 38bn from the 440,
    or a 38 sbn.

    This may seem like the obvious choice, but...
  4. Re: Dual Buckshots on a SXR 800 motor in a X2. Jetting help.

    +1

    But, the Buckshots (IMO) are awful carbs and you would be better
    off rejetting the stock sxr carbs.

    The buckshots will make your set-up very important in order to be
    reliable.
    ...
  5. Replies
    13
    Views
    399

    Re: Throttle linearity

    Since we have a few days until you ride it on Friday, how was
    the 440 set-up? Stock 38mm carb, stock exhaust, and maybe
    stock compression? with a s/s impeller.

    Do you know if the impeller is a...
  6. Thread: carb question

    by wmazz
    Replies
    4
    Views
    232

    Re: carb question

    +1

    Also, did you replace the o-ring on the needle & seats?


    Bill M.

    The in-line throttle shaft sbn-i carbs were odd-balls. They had a lower
    than normal pop-off, @ 16 to 21 psi according...
  7. Replies
    13
    Views
    399

    Re: Throttle linearity

    What is a "racing crank"

    Which description best describes the power output?

    (1). The power is smooth but accelerating too fast or (2) there is
    a dip in the power and then the power hits...
  8. Replies
    10
    Views
    484

    Re: 1990 550SX Crank Seal Question

    Hard to mess them up, if you purchase 3) 92049-3006 main seals.
    They are a much needed improvement over the stock main seals.

    The 1991 reed engine came with 2) 92049-3006 main seals. Your
    PP...
  9. Replies
    13
    Views
    625

    Re: Name that failure - Seizure

    The carbon popping is not a good sign. Water or heat.

    The cylinders look dry.

    Why did you choose Wiseco?


    Bill M.

    Did you use oem o-rings, and did you use something to hold them in...
  10. Replies
    5
    Views
    237

    Re: ZXI 750 Carb setting

    Did you disassemble the rack?

    Did you replace the springs?

    What is the lever height.

    The oem carb settings no longer apply. You need to learn how to tune
    the low (pilot) screws to what...
  11. Replies
    17
    Views
    617

    Re: 650sx Sudco 42 jetting?

    Here is a comparison of similar carb diameters for a similar engine size.

    650 => 38 cdk2 jet total 75/140 = 215
    587 => 38 SBN-i jet total 210 ---------- Very small main jet booster
    650 => 42...
  12. Replies
    17
    Views
    617

    Re: 650sx Sudco 42 jetting?

    Quinc, these specs have been bothering me. I have found another Sudco 42
    with leaner specs than this, but it still bothers me because I don't think these
    carbs are special, or more capable of...
  13. Replies
    13
    Views
    625

    Re: Name that failure - Seizure

    The cylinders look like they were only honed, and then installed aftermarket pistons?

    What brand were they, and what clearance did they have. They look like the
    cylinders were only lightly...
  14. Replies
    9
    Views
    203

    Re: 90 587 GT jetting Q

    90' used round body carbs, 91' used sbn carbs.

    The round body carbs have good low speed bypass holes for improved acceleration.

    They would be good dual 38's for a js650.

    ...
  15. Replies
    3
    Views
    271

    Re: 90' js440 igniter question

    I never seen a problem with a stator wire, but when the voltage
    regulator dies it usually fries the ground wire and some times the
    charging coil.

    Your ignition coil looks good. In many cases...
  16. Replies
    8
    Views
    188

    Re: 96 SPX dumping oil

    Was the engine hard to start? If you are lucky, that oil you see,
    may just be fuel from a flooded engine.


    Bill M.
  17. Replies
    3
    Views
    271

    Re: 90' js440 igniter question

    Always test spark with both plugs grounded at the same time

    Is the ground wire fried?

    There are 2 basic tests.

    1). Swap out the coil with a known good coil. If no spark, look at grounds,...
  18. Replies
    174
    Views
    17,336

    Re: Jetting Guru's! Dual 3 jet Keihin CDK2 40's help!

    http://www.pwctoday.com/showthread.php?t=464495
  19. Re: 1996 wave venture 700 runs great, but not getting fuel or spark after I shut it o

    A couple thoughts:

    Your goal should be: Use the choke after the ski has been sitting unused for
    several days. No choke after it has been started that day, and maybe the next.
    You should be able...
  20. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    I think all the watercraft, 900, 1100, 1200 ultra all have the same bogg
    just like the Kawasaki motorcycles did in the 80's. On the street bikes
    we would drill the low jets or modify the pilot...
  21. Re: 1996 wave venture 700 runs great, but not getting fuel or spark after I shut it o

    Is there a choke or fuel primer? If primer, does it feed both carbs?

    The standard low jet is a 67.5, and the low (pilot) screw setting (5/8)
    seems lean to me too. Good possibility those settings...
  22. Thread: 750sxi bog

    by wmazz
    Replies
    3
    Views
    260

    Re: 750sxi bog

    Did you reuse the old carb base gaskets?


    Bill M.
  23. Replies
    17
    Views
    617

    Re: 650sx Sudco 42 jetting?

    In the past I have seen 650 specs 75/145.

    The largest concern for me is the impeller. If it is an 8/16, rejetting
    should be easy. But if there is a straight pitch, finding jetting that
    is rich...
  24. Re: 95 Waveraider 1100 not getting vac pulse to fuel pump

    7 & 7



    Bill M.
  25. Re: Help with Ultra 150 Throttle position sensor

    I am curious why you suspect the TPS?


    Bill M.

    I also have a manual.
  26. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    My ZXI 900, and many of my 900 customers complained about a hesitation
    off idle. The 900 had the same basic carbs, but no accelerator pump. Instead
    it (the 900) had a rich low jet (#78), and...
  27. Re: 95 Waveraider 1100 not getting vac pulse to fuel pump

    I would prefer that you test the fuel pump output while it is connected to
    the engine.



    Most manufactures use a 1 way valve on the fuel tank vent line. You should
    see ~7 psi & ~ in-hg on...
  28. Re: BJP Prize Ski Build Thread - 650 Jammer - Jet Blast 2019

    What a great idea. The Wave Jammer was so much fun!!

    The WJ should be the WB1


    Bill M.
  29. Re: 95 Waveraider 1100 not getting vac pulse to fuel pump

    Both statements are concerning. Obviously your compression gauge reads at least
    25 psi low. But the 5 psi difference is significant on watercraft. It could be a sign
    that rust damage exists in the...
  30. Replies
    3
    Views
    257

    Re: 1993 750 SS Rebuild

    Repairs tend to get costly if you continue running an engine
    with a problem.

    I recommend you pull the pump, and inspect it, and the carrier
    bearing.

    Sounds like you have carb problems, we...
  31. Replies
    174
    Views
    17,336

    Re: Jetting Guru's! Dual 3 jet Keihin CDK2 40's help!

    Most people want it easy, and not learn how to tune or jet their
    carbs. The basic steps to rejetting a Mikuni are the same as a
    Keihin. I cover power tuning and the idle drop test in my blog.
    ...
  32. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    There are a few problems with how watercraft owners perceive impellers and
    the way manufactures market them.

    Many people look at impellers as though they were gears, or sprockets. Basically
    if...
  33. Replies
    10
    Views
    414

    Re: 81 Surf Jet No Spark

    It might be caused by a bad condenser (and the narrow point gap),
    but since these tests are easier than removing the points and
    condenser, I recommend trying these steps first. ...
  34. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    Have you dried out the pipe and/or the waterbox?

    Any mods to the waterbox?



    Bill M.
  35. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    What Impeller is in the pump?


    Bill M.

    important details

    when did the problem start: before or after the first carb overhaul?

    Did you ever find a problem inside the carbs?
  36. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    What impeller is in the pump? Has it been modified?


    Bill M.
  37. Replies
    174
    Views
    17,336

    Re: Jetting Guru's! Dual 3 jet Keihin CDK2 40's help!

    That is something that will help all Kawasaki Keihins, but Polaris
    Keihin's and Mikuni SBN's come stock at .024"


    Bill M.
  38. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    When I trained to be a mechanic, we spent an entire quarter on "carburetion"
    and that was literally one of the first things we were taught.


    Did you confirm the accelerator pump actually works?...
  39. Replies
    14
    Views
    505

    Re: 1996 ZXI 1100 hesitation/stalling

    Don't slam the throttle!


    Bill M.

    What you are complaining about is normal for most carbs no matter
    what kind of vehicle it is.

    Please don't use different colors again :(
  40. Re: 1993 Kawasaki 750 Super Sport Carrier Bearing Question!

    Just clear silicone. Not ultra silicone. I prefer clear because it is
    less noticeable. I use clear on the driveline and pump.

    For example I hate to see gaskets sealed with orange silicone,
    and...
  41. Re: ISO Seadoo 717/720 single carb with rotary valve cover.

    If you want jet specs, let me know.


    Bill M.
  42. Replies
    174
    Views
    17,336

    Re: Jetting Guru's! Dual 3 jet Keihin CDK2 40's help!

    Do you have a pipe on the JS750?



    So you know, that you would normally jet richer for cold weather, and leaner
    for hot weather??



    Maybe it will richen the low jet 1 size.
  43. Replies
    62
    Views
    3,186

    Re: Carbon pipe build

    That is how a good pipe is supposed to behave.


    Bill M.

    Is that with or without water injection??
  44. Replies
    2
    Views
    612

    Re: Hi From Northern Territory Australia

    Looks like you can enjoy your SeaDoo's all year long :)

    What is the average high and low temperatures where you live?


    Bill M.
  45. Replies
    12
    Views
    456

    Re: Huge backfire 96 xp

    I saw that happen to a guy with a hard starting SP (loaded up). He sprayed a bunch
    of starter fluid, then he put on the seat, and sat down on it and hit the start button.
    KaBoom!! the backfire...
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