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      JUST IN!   04/24/2018

      HOW TO: 4-STROKE PISTON REPLACEMENT DONE RIGHT!

bruce lockwood

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About bruce lockwood

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    California
  1. Look closely at the bolt and you will see a slot for screw driver. Maybe it is attached to a metallic bellows that when said screw is turned in/out it moves the bellows thus adjusting the volume of the header. Simple way to change power characteristics. Cheers Bruce