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Thread: "Thump-8" 4 stroke 1/8th scale engine
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Old 09-06-2009 | 06:30 AM
  #60  
dieselpilot
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Joined: Jul 2009
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I'll have to do some searching. I've never heard of a Roots type YS. Webra engines were all rotary valve. There was an OPS OHC belt driven four stroke.

Greg
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