Differences in 750 engines of different dates
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  1. #1
    PWCToday Newbie Vasilis 440's Avatar
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    Differences in 750 engines of different dates

    Hello, I just bought a Kawasaki X-4 (750SS) which I think is a '93 model (JH750A-600393 HIN) with a broken engine. Now I'm trying to find parts to rebuild it and I want to make it with Pro-x parts. The problem is that Pro-x doesn't have any parts for this model. Yet they have parts for the '97 model. Wiseco has parts for both models but with different codes. Is there any difference in the engines of those two dates, '93 and '97. Aren't they same? If I take parts for the '97 model will they fit mine?

  2. #2
    Resident Guru mmcahow's Avatar
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    Re: Differences in 750 engines of different dates

    Well the big difference you need to look for is the difference between the small pin 750 and the big pin 750's.

  3. #3
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: Differences in 750 engines of different dates

    1997 is a big pin = 22mm wrist pin

    1993 is a small pin = 20mm wrist pin
    Last edited by mcn6; 05-16-2016 at 01:26 PM. Reason: Sphelling



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  4. #4
    PWCToday Newbie Vasilis 440's Avatar
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    Re: Differences in 750 engines of different dates

    So, as long as I will make a total rebuild of the engine, I will not have any problems buying all the staff for the '97 model, they should fit each other. I will keep the crankshaft, crankcase, cylinder block and cylinder head. The rest will be replaced. The big end diameter of the connecting rod, and therefore the crankpin, is it the same for both models?

  5. #5

    Differences in 750 engines of different dates

    If you're keeping your existing crankshaft you need the small pin "93" Pistons also... To run big pin pistons you'll need cases, crank, jugs for a big pin.... The small pin head would give a different compression ratio so you may want a new head also depending what it gets you

    I'm currently resleeving my small pin, replaced cases and new wiseco pistons. I had SBT Pistons previously, they were great, only needed a rebuild because I overheated it and cracked a sleeve. Definitely still lots of parts available for them


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    Last edited by sirsleeper; 05-16-2016 at 10:43 PM.

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