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ys 160dz Question ?

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Old 05-15-2013, 03:16 AM
  #1  
kobi
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Default ys 160dz Question ?

Helllo
Today I changed the valve springs of my engine dz160,
I noticed that have six holes around the inlet valve in the cylinder head ( Attached Image )
My question what these holes are used ?
Thanks
kobi
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Old 05-17-2013, 09:02 AM
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petec
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Default RE: ys 160dz Question ?

Pressurization of the air/fuel charge and top end lubrication.
Old 05-18-2013, 03:05 AM
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kobi
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Default RE: ys 160dz Question ?

Thanks
petec
I also question the producer and this is what they replied:

Dear Mr. HAMTZANI

DZ160 and other our engines have holes. The room inner the valve cover connects to inlet manifold. The room is used as the air chamber.
Thank you very much.

Best Regards
Naohisa Yamada

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