Kawasaki 750 x2 exhaust options and opinions
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  1. #1
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    Kawasaki 750 x2 exhaust options and opinions

    Looking for advice on the best exhaust. I have a line on a Coffman and a pjs. Wondering which would be best for racing. Price is the same. Current build. 750 small pin. Single 46 with pjs intake. Westcoast exhaust manifold. Hooker impeller.

  2. #2
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    Re: Kawasaki 750 x2 exhaust options and opinions

    pics of both help... several versions of both were made
    1994 WB1 1100 conversion - 57mph on GPS

  3. #3
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    Re: Kawasaki 750 x2 exhaust options and opinions

    Quote Originally Posted by StuRat View Post
    pics of both help... several versions of both were made
    pictures attached
    Attached Images Attached Images

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    Re: Kawasaki 750 x2 exhaust options and opinions

    I would be concerned. That first picture is mine. I sold that pipe 2 years ago or so. Thats a first gen coffman on the right. Unless you have specifically laid eyes on these in person I would say don't waste your time with whoever it is you are dealing with.

    And when I say "mine" I mean that is my photo. I took it. Honestly if you dig through enough of my posts far enough back you can probably find the listing.
    Last edited by StuRat; 06-23-2022 at 08:47 PM.
    1994 WB1 1100 conversion - 57mph on GPS

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    Re: Kawasaki 750 x2 exhaust options and opinions

    Quote Originally Posted by StuRat View Post
    I would be concerned. That first picture is mine. I sold that pipe 2 years ago or so. Thats a first gen coffman on the right. Unless you have specifically laid eyes on these in person I would say don't waste your time with whoever it is you are dealing with.

    And when I say "mine" I mean that is my photo. I took it. Honestly if you dig through enough of my posts far enough back you can probably find the listing.

    i own the pjs and I bought it from you!! Just seeing if the Coffman is worth the money or not. I can sell the pjs to my buddy if the Coffman is better

  6. #6
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Kawasaki 750 x2 exhaust options and opinions

    Generally I prefer the Coffman over the PJS. As you probably know
    the PJS was designed to make HP at a higher rpm (6750), and the
    Coffman at 6500rpm.

    The cast aluminum Coffman is a completely different pipe that is
    designed for more peak HP and rev out further than any other pipe.
    It is also tuned for 6500 rpm, but it is a much better design.

    But most Jet Ski engines are not set up to rev further.

    That said, the stamped Coffman will have good peak HP, but not
    not as much as the cast pipe. The design makes peak HP and
    signs off after peak hp like most watercraft pipes.


    Bill M.
    Horsepower == Speed, RPM != Speed



  7. #7
    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    Re: Kawasaki 750 x2 exhaust options and opinions

    Between the 2 pipes posted in the pics and you own the pj's, I'd run that. You have 2 stinger sections to try and with the 750, I'd definitely go with the longer stinger.
    96 superjet- rockered, -4, wide tray, adjustable footholds, kv148 mag setback pump, skat 7/14 impeller, rrp adjustable pole, blowsion ovp steering, 62t/62t, ada head, zeel A02T cdi, dual 44s, boysen power reeds, TNT SS chamber

    93-x2, newmiller ported SP750, milled head, R&D single 46 intake, sbn46, fpp blaster chamber pipe, hooker 9/15, umi, rhaas squirrel cage, dakine foot straps

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