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Old 11-15-2008 | 06:36 PM
  #16  
Tony Babington
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From: Staffs, UNITED KINGDOM
Default RE: ys engine surging at full throttle
Hello Petec, I have seen the thread about piston porting. It mentions drilling four #60 holes. Is this an American notation. Is it 0.6 mm, 60 thousands of an inch ( .060") or 60 microns which is equivalent to .008" 0r 0.2mm? Hope you can help. Kind regards Tony
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