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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Changing oil with an anti-wet sump pump valve?
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<blockquote data-quote="Peter Holmes" data-source="post: 69532" data-attributes="member: 302"><p>Far be it from me to second guess Davids reasons for not using an anti sumping device, but here goes, it depends what device you choose to use, on Old Harry, Marcus Bowden has fitted an ingenious device connected to the petrol lever tap, turn the petrol on and off and you automatically also turn the oil on and off, foolproof and without any flow restriction whatsoever. Some other devices that are totally automatic and rely on the oil pump suction that the pump creates to unseat a sprung loaded ball off a seat to allow oil to pass, this only happens when the engine has been started and the pump creates suction, I purchased one of these devices, but one attempt at sucking the ball of its seat using my own lung power was enough to concern me, simply put it must detract somewhat to the already questionable performance of the Vincent lubrication system, if I have got it wrong, sorry David.</p></blockquote><p></p>
[QUOTE="Peter Holmes, post: 69532, member: 302"] Far be it from me to second guess Davids reasons for not using an anti sumping device, but here goes, it depends what device you choose to use, on Old Harry, Marcus Bowden has fitted an ingenious device connected to the petrol lever tap, turn the petrol on and off and you automatically also turn the oil on and off, foolproof and without any flow restriction whatsoever. Some other devices that are totally automatic and rely on the oil pump suction that the pump creates to unseat a sprung loaded ball off a seat to allow oil to pass, this only happens when the engine has been started and the pump creates suction, I purchased one of these devices, but one attempt at sucking the ball of its seat using my own lung power was enough to concern me, simply put it must detract somewhat to the already questionable performance of the Vincent lubrication system, if I have got it wrong, sorry David. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Changing oil with an anti-wet sump pump valve?
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