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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Pump and Oiling Sytem Modifications
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<blockquote data-quote="Marcus Bowden" data-source="post: 165529" data-attributes="member: 3287"><p>Thank you very much Greg, I fit a second bush in at the cam end as that is where most loading is so the oil is still controlled.</p><p>The post war single stock pump will be fitted with double start as my twin is .</p><p> Thinking that I want all the oil to be filtered I've already drilled into the filter chamber from the timing cover but corresponding with a German friend he pointed out that the feedback from my Honda p/p would return the sump oil back to my oil tank, which would be correct. So the outlet from the p/p sleave must be blocked off and a non return valve fitted into the sleeve end plug (ball & spring) To do the same to a twin the oil feed to the crank pin would have to be enlarged considerably.</p><p>What I've done to my "A" Comet when fitting a floating bush Enfield style.</p><p>Floating bush with herring bone grooves taking oil out to the extremities but stopping before the edge. Pin and con-rod eye polished as much as possible with 0.002" either side of bush . Oil pressure in the region of two bar or 30 psi but having difficulty starting so fitted coil ignition now</p><p>[ATTACH=full]54437[/ATTACH]</p><p>oil p/p housing machined out to deliver half as much again, the brass is a cockup as I went too deep</p><p></p><p>[ATTACH=full]54438[/ATTACH]</p><p></p><p>Big bore quill made and fitted with a teflon seal up against the mainshaft that cold moulds into tapered end of crank</p><p>[ATTACH=full]54439[/ATTACH]</p></blockquote><p></p>
[QUOTE="Marcus Bowden, post: 165529, member: 3287"] Thank you very much Greg, I fit a second bush in at the cam end as that is where most loading is so the oil is still controlled. The post war single stock pump will be fitted with double start as my twin is . Thinking that I want all the oil to be filtered I've already drilled into the filter chamber from the timing cover but corresponding with a German friend he pointed out that the feedback from my Honda p/p would return the sump oil back to my oil tank, which would be correct. So the outlet from the p/p sleave must be blocked off and a non return valve fitted into the sleeve end plug (ball & spring) To do the same to a twin the oil feed to the crank pin would have to be enlarged considerably. What I've done to my "A" Comet when fitting a floating bush Enfield style. Floating bush with herring bone grooves taking oil out to the extremities but stopping before the edge. Pin and con-rod eye polished as much as possible with 0.002" either side of bush . Oil pressure in the region of two bar or 30 psi but having difficulty starting so fitted coil ignition now [ATTACH type="full"]54437[/ATTACH] oil p/p housing machined out to deliver half as much again, the brass is a cockup as I went too deep [ATTACH type="full"]54438[/ATTACH] Big bore quill made and fitted with a teflon seal up against the mainshaft that cold moulds into tapered end of crank [ATTACH type="full"]54439[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Pump and Oiling Sytem Modifications
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