05-23-2015, 12:43 AM
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#16 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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I haven't heard of any other cases of valve recession for the ZS177MM/NC250 engine. I also find it difficult to understand how adjusting the intake valve too loose would cause valve recession.
 CO2, Have you been riding in dusty conditions? Did you oil your air filter? Have you examined your carburetor boots for possible damage? I ask these questions because I wonder if dust is entering the cylinder head with the fuel/air mixture. 
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Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894 |
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05-23-2015, 12:29 PM
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#17 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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I'm wondering the same thing, Spud. If the valves were too loose, they would hardly open, compared to the proper setting.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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05-23-2015, 02:40 PM
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#18 | |
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Join Date: Jul 2013
Location: Türkiye
Posts: 88
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Quote:
İ suspect to my drive style , a mountain rampage, some times i used high performans(supermoto wheels,13 front+crf250l 40 rear sprocket+high rpm=150+kmh, isee max speed my bike 163kmh short time.) and , to activate compression = valve to crush skirt. 11.5:1 compresion ratio. (some times i used comresion, brakes on mountain road.) |
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Linear Mode
