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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." ![]() 2015 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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#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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#18 | |
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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