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Js550 cylinder jug

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  • 11-09-2017, 10:35 PM
    Js550 cylinder jug
    I have an '82 js550. I bought it and tore it down. There are a few not too bad scratches but since I'm this far torn down I want nice cylinder walls. It has been bored out to the point that I'm looking to replace the jug and I'm wondering are all PP550 jugs compatible? If not, What's compatible with my 82 motor?
  • 11-10-2017, 09:33 PM
    Re: Js550 cylinder jug
    All JS 550 piston port cylinders are basically the same.
  • 11-20-2017, 07:06 AM
    delta rat
    Re: Js550 cylinder jug
    There's a huge difference in porting between the 82-85 jugs and the 86-90 530a jugs which are labeled 530a above the intake. More aggressive porting on the 530a. Look for some later jugs that are still on their original or first bore. It not good to use 550 jugs past 1mm over.
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