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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Series D oil tank
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<blockquote data-quote="greg brillus" data-source="post: 92290" data-attributes="member: 597"><p>I know of several people including my self who have at elevated speeds had oil spewing from the tank cap. Not all Vincent owners with Girdraulics have had tank slappers either, but I see logic in how the tank breathing works. The oil system may not be high pressure or flow but it does scavenge at approximately twice the volume as what it delivers. It is my belief that at elevated engine speeds that the small hole in the tank cap would struggle to flow enough to compensate this difference in volume. I tend to look at why designers do something and then reason why we should change it ........I prefer to leave my tank breather/chain oiler open and run to the back axle. Perhaps some just don't ride fast enough for it to be an issue................<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="greg brillus, post: 92290, member: 597"] I know of several people including my self who have at elevated speeds had oil spewing from the tank cap. Not all Vincent owners with Girdraulics have had tank slappers either, but I see logic in how the tank breathing works. The oil system may not be high pressure or flow but it does scavenge at approximately twice the volume as what it delivers. It is my belief that at elevated engine speeds that the small hole in the tank cap would struggle to flow enough to compensate this difference in volume. I tend to look at why designers do something and then reason why we should change it ........I prefer to leave my tank breather/chain oiler open and run to the back axle. Perhaps some just don't ride fast enough for it to be an issue................:) [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Series D oil tank
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