Jsp brand stators
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  1. #1
    PWCToday Newbie
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    Jsp brand stators

    Hi all! I have been working on my neighbors 1998 kawi 750 stx. He said it was running fine but then died. I replaced the stator with a jsp brand stator if amazon. Now the ski runs fine on the trailer but will only go about 28 mph and sounds like it’s missing on a cylinder. The compression on each cylinder is about 125. Dvi voltages are red/purple-178volts unplugged.Blue/green-6.5v when plugged, 13volts when unplugged. Cdi output voltage is 2.2 volts plugged in, 148 volts unplugged. So I “think” the voltages are good?? It have brand new coils and voltage regulator.
    i pulled apart the carbs, visually checked and cleaned them. Any ideas? I read a few reviews about the jsp brand stators stating not to buy, if course after i had already bought it. Any help would be appreciated… Tks

  2. #2
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Jsp brand stators

    What you'll need to do is use your meter on a household outlet and see if it reads around 120v. If it does, then that stator is creating way too much voltage. Excitor should only be aroun 60-70vac and pickup around 1vac. Then steadily increasing as the rpm increases. I reckon way too much voltage would surely 'confuse' the cdi. Possibly even burn it up.
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  3. #3
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    Re: Jsp brand stators

    Thanks for the reply. I checked my fluke 87V meter and had 120 volts without the dva. With the ES brand dva I had 165 volts. So everything seems to be correct for both imho. So if you agree I will purchase a little better brand of stator like the SBT brand?? Should I be reading those voltages with the cables unplugged? At least fir me it was very hard to fi d any info on what the voltage should be. I think the only ones I found was for a yamaha which matched up pretty good for the voltage I had but obviously wrong. Thanks again for the help!!

  4. #4
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: Jsp brand stators

    Use the Fluke. Normally we are looking for 'loaded' voltage. That's with everything hooked up. Just stab the meter leads into the backside of the connector. Don't use a DVA adapter, just straight leads. ALL aftermarket electrical is hit and miss. The last Kawi 750 I did I got 3 bad ones in a row!! I'm waiting on one right now for a 4 stroke Yamaha that was brand new bad.....and that one is a 4 hour job!
    http://www.facebook.com/twinlakesjetskirepair

    '89 Kawi 650SX 42.4 GPS
    +3" stock pipe, ported ex. manifold, drilled waterbox, blueprinted pump, Ocean Pro ride plate

    '99 Yama GP1200 65U 61.8 GPS
    ported cylinders, matched cases, milled head, blueprinted pump, long ride plate

    '96 Seadoo HX 717 53.13 GPS
    light porting, massaged cases, lightened flywheel, port matched manifolds, Rossier pipe, stubby pump cone

  5. #5
    PWCToday.com Is My Home Away From Home Bionic racing's Avatar
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    Re: Jsp brand stators

    Did you replace stator because it was not sparking ? Just fixed an six pro 1998 , original owner ski , same symptoms , broken reed rear cylinder was the problem , pull air box top , start and rev up , if you see fuel spitting back up through a carb , that’s the cylinder with the bad reed , it will have spark , it will have compression , it will have fuel , it will sound like it’s running on one cylinder , cause it is , change whole reed block , wa la , riding this weekend

  6. #6
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    Re: Jsp brand stators

    Quote Originally Posted by Bionic racing View Post
    Did you replace stator because it was not sparking ? Just fixed an six pro 1998 , original owner ski , same symptoms , broken reed rear cylinder was the problem , pull air box top , start and rev up , if you see fuel spitting back up through a carb , that’s the cylinder with the bad reed , it will have spark , it will have compression , it will have fuel , it will sound like it’s running on one cylinder , cause it is , change whole reed block , wa la , riding this weekend
    right I had no spark at all on either cylinder. It’s been a while back now but it was easy to see that the original stator was fried/melted. I believe it was the trigger that was burnt.

  7. #7
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    Re: Jsp brand stators

    Wow 3 bad ones in a row! Hopefully u could tell that before u installed them but if like this one prolly not. If not thats a lot of wasted labor from crappy parts!

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