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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
04 Yz250f
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[QUOTE="Imho, post: 713262, member: 28822"] I should also clarify the above and say that cam lobe/bucket wear also affects clearance in that as they wear the clearance increases. Cam lobe/bucket wear is more pronounced when an engine is new or has just been rebuilt (or is poorly maintained) and is part of the bedding in process. Generally, if an engine has been run-in then valve seat wear and reducing clearances will be the major factor. All of the above is most prevalent on the exhaust side where temperatures are higher and the valve cooling happens when the valve is sitting in the valve seat. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
04 Yz250f
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