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150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum

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  #1  
Old 03-16-2010, 11:31 PM
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Question Valve clearance?

Does anyone know the correct valve clearance for the gy6 150? Is the "A" version spec the same as the "B" version? I've searched several sites and the specs are all different.
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Old 03-17-2010, 12:30 AM
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according to my manual
.003 to .005 inch on both valves
for tomberline punisher
olderthan
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Old 03-17-2010, 06:26 AM
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my manual says .003 to .004 i set both my valves at .005
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Old 03-17-2010, 09:59 AM
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I guess, since I have a Carbide too, it would be the same on mine too?
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Old 03-19-2010, 04:38 PM
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Thanks for the replies.
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Old 03-21-2010, 08:33 PM
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The gy6 valve specs should be .003" intake and .005" exhaust. These are the best clearances I found to give top performance. TOM
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Old 06-04-2010, 05:57 AM
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I have read the manuals and some engg books, Most of all suggest .003 to .004 is good, some also suggest that it should be .001 for best results, you can look for what suites you best.....
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