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  1. Re: Higher Compression and Advanced Timing 94 750 SSXI Reliabilty

    I thought 650s use a fixed timing across the whole rpm range?
  2. Thread: 10/18 skat

    by runrider
    Replies
    3
    Views
    2,586

    Re: 10/18 skat

    C75 big hub or little hub?
  3. Re: SXR/ 750 sx factory pipe with Nynja C4 Chamber

    I'll take it
  4. Replies
    11
    Views
    2,081

    Re: Motor acting strange

    A lot of time when you're doing you're first runs after a new build, the carb hasn't gotten enough fuel get because you hardly filled the tank. If the carb is sucking bubbles for any reason, it can...
  5. Replies
    3
    Views
    1,137

    Re: 750 crank question

    Rebuild. Most people don't know how to check a crank and will sell you a bad one unknowingly.
    Wsm cranks for me.
  6. Replies
    18
    Views
    3,367

    Re: Factory pipe chamber length

    https://runningrich361049759.wordpress.com/2020/01/15/tuning-exhaust-water-injection-on-jet-skis/

    This one covers water injection.
  7. Replies
    18
    Views
    3,367

    Re: Factory pipe chamber length

    Here is some helpful bathroom reading.
    https://runningrich361049759.wordpress.com/2020/01/07/how-to-read-two-stroke-exhaust-pipes-and-predict-their-powerbands/
  8. Replies
    6
    Views
    1,753

    Re: Kawasaki 750 small pin vs big pin crankcase

    I heard good things about a SP top and BP bottom. I thought the BP bottom has better porting. No first hand experience. Your statement about case volume makes a lot of sense.
  9. Replies
    37
    Views
    9,054

    Re: 650 X2 Light Mod Impeller of Choice

    Yeah, John, we are on the same page. I misspoke - I intended to say that big pins, not small pins, can struggle to reach their powerbands with impellers that are too tall. Hookers add more load than...
  10. Replies
    37
    Views
    9,054

    Re: 650 X2 Light Mod Impeller of Choice

    Hookers load the nozzle harder, and that generates thrust. It also makes it harder for the motor to rev up as high, and many motors... Especially small pins... Can't reach their peak power RPM.
    A...
  11. Replies
    37
    Views
    9,054

    Re: 650 X2 Light Mod Impeller of Choice

    Hooker 9/15 if you want to pay for it. If you're cheap, get the 15.5.
    You should get your motor checked out. 135 compression is almost low. If the motor is good, bump that compression up.
  12. Replies
    10
    Views
    4,303

    Re: 650 X2 Ride Plate Openions

    Theres three factors I look at. One is length, and two is the chine depth, and three is suction holes. Length helps with stability at speeds, and limits slide out. Chines keep you from sliding out...
  13. Replies
    19
    Views
    5,942

    Re: JS and 750 parts

    Good seller. Thanks again
  14. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    You're saying that a hooker is merely a steep skat swirl c75 impeller that's been repitched shallower (leaving the steep root angle) and cut back to fit a 650 pump?
  15. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    How can you tell a skat c75 from a hooker?
  16. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    Yeah I'm using a #20 as well. The powerband is just so low. I'm going to try swapping in a #22 without changing anything just to see what happens. Will post results in some number of weeks.
  17. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    554160554161554162554159
  18. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    I'll receive it Monday.
    I'm optimistic that a nozzle change might help both low and top end because the #20 is rumored to have a power peak around 7100rpms. If anyone has port measurements, maybe I...
  19. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    I just bought a hooker 10/16 and plan to use bends, nozzles, and motor changes in search of 50mph with strong acceleration.
  20. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    Who was it in NY? I race there.
  21. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    Gotcha! Yeah I'm not sure how much I trust this cheap tach. For sure this setup should be able to spin a 10/18 faster... If I really am down on rpms, i think it has (as much or) more to do with a...
  22. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    What? How can that be? I know you know what you're talking about - you're Johnny X2. But I need to understand why if it pulls hard all the way up to 6800, how can it be overpropped? Besides, I...
  23. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    It's a standard 650 skat, not a c75. My nozzle is the stock x2 nozzle with factory trim (I like a little up trim for carving buoys). I think the stock nozzle is 80mm, but I didn't measure it.
    Yes,...
  24. Re: Kawasaki Impros 140mm Hooker Impeller - what's your ski and set up

    I've got a 10/18 skat on my sp750/Coffman x2. It pulls pretty hard and let's me take the holeshot but tops out at 43mph and under 6800rpm with the stock pump and nozzle. I'm going to try a few more...
  25. Thread: Front fills?

    by runrider
    Replies
    17
    Views
    5,865

    Re: Front fills?

    Who makes them in NJ?
  26. Replies
    25
    Views
    8,486

    Re: 1989 X2 Tips for a Newb!

    1. The pipe won't make it loud. Pipes add power. Generally, used pipe price reflects power.
    2. Drilling the waterbox will make it louder. More holes = more volume. Also, reduced backpressure and...
  27. Replies
    1
    Views
    2,739

    Re: '87 X-2 Jet-Ski For Sale

    Price?
  28. Re: WTB 750 carb+Mani local in Wilkes-Barre PA TODAY

    Single preferred. Anything to get back on the water pronto.
  29. WTB 750 carb+Mani local in Wilkes-Barre PA TODAY

    WTB 750 carb+Mani local in Wilkes-Barre PA TODAY
  30. WTB 750 carb+Mani local in Wilkes-Barre PA TODAY

    WTB 750 carb+Mani local in Wilkes-Barre PA TODAY
  31. Replies
    12
    Views
    1,532

    Why am I so exhausted at WOT in chop?

    Whenever I ride WOT/race pace in rough water, I tire out REALLY quickly. Like maybe a couple minutes of WOT in chop, and I'm toast. I'm 180 lbs and training for a marathon, so it's not my physical...
  32. Replies
    16
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    57,354

    Sticky: Re: Delaware Boat Access Sites

    Who did I see on the Lehigh river under 33 today? Three guys on stand ups.
  33. Replies
    6
    Views
    1,396

    Re: 650 X2 carb at 5 turns out???

    For a new-to-you ski that wass obviously suffering from the hands of a novice mechanic, you should go through and check a few things to see what you're working with. First, compression, then crank...
  34. Replies
    12
    Views
    1,712

    Re: 750, lost spark.

    Yeah I think everyone went to fb.
    Did you check your electrical connections, grounds everywhere for corrosion?
    Did you change spark plugs?
    Did you cut back plug wires?
    You sound like you know...
  35. Replies
    4
    Views
    1,243

    Re: Hull swap: my 650sx for your x2 (PA)

    Bumpity bumpity bump.
  36. Replies
    4
    Views
    1,243

    Re: Hull swap: my 650sx for your x2 (PA)

    Bump. I can also build it up to match your trade in value... Would also take cash plus hull.
    I want another x2 hull and no way is the wife letting me buy another ski. I NEED. A hull trade!
  37. Replies
    22
    Views
    44,832

    Re: How far into the fall are you running?

    We ought to organize a ride next year. I'm hanging it up for the fall early this year.
  38. Replies
    23
    Views
    2,756

    Re: Question-please read factory pipe

    Seems a little disingenuous to raise your price after people already said they would buy at a lower price. That's not how negotiation works. You don't ask for $1, then when I agree, demand $2 and see...
  39. Replies
    38
    Views
    4,844

    Re: 650SX Factory B pipe Sudco 42mm blue carb

    Wow, what mods got you to 52 on a 650 x2 with a Coffman?
  40. Replies
    4
    Views
    1,243

    Re: Hull swap: my 650sx for your x2 (PA)

    Near Allentown.
  41. Replies
    4
    Views
    1,243

    Hull swap: my 650sx for your x2 (PA)

    I have a 1989 650sx that I would love to swap for an x2. I would like to strip it down and keep my own innards, but we can talk and work out a fair deal. It is in good shape. The pole is stock, but...
  42. Replies
    22
    Views
    44,832

    Re: How far into the fall are you running?

    Hey undyingbreed, aren't you the guy I sold that 93 x2 to? How did that project go!??
  43. Replies
    7
    Views
    1,274

    Re: X2 UMI Steering stem

    I'm thinking of adding one of these. How was it? Why are you ditching it? Dibs if the other two guys fall through.
  44. Replies
    6
    Views
    1,396

    Re: 650 X2 carb at 5 turns out???

    I thought they only turn out 3 turns max... Not familiar with that exact model, but 4-5 sounds off.
  45. Replies
    3
    Views
    1,217

    Re: 1988 650cm X2 Hull Design

    Nope. The bottom half of the x2 was only used on x2. Even it's sister, the 650sx, is significantly different. If you like the way it rides but get a sore neck, you can modify the riding position by...
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