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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Gearbox Sealing
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<blockquote data-quote="Tom Gaynor" data-source="post: 1965" data-attributes="member: 4034"><p><strong>Burman boxes - idle speculation......</strong></p><p></p><p>Firstly, thanks nkt267, I now know where to get straight 140 gear oil, for use in my Sunbeam worm drive! Who suggested this was just idle gossip? </p><p>Sid Biberman avers that filling Vin twin boxes with EP90 makes them feel smoother (EP90 is about SAE40 vis). I've tried it. I can't honestly say I noticed: maybe it's me. I use ATF in Vin and Manx boxes (ATF is probably minus SAE20 vis ) with no problems, and Anyold SAE40 in the Rudge because it's never in there for long.</p><p>Renold used to say that putting heavy oil in chaincases was fruitless because the chain just cut a channel in it and remained dry. 'iggins (The Prof) in MPH casually exploded the theory that making an oil bath for cams - the cam would dip into the cooling and lubricating oil on each rotation - was other than a waste of time. When (Volvo?) made one, c/w a perspex viewing rig, it was evident that all the oil was swept out of the cooling and lubricating bath on the first rotation and the cam remained dry thereafter.</p><p>Not unrelated: was there a date when Burman changed to oil-filled boxes, or was it oil for some bikes, grease for others?</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 1965, member: 4034"] [b]Burman boxes - idle speculation......[/b] Firstly, thanks nkt267, I now know where to get straight 140 gear oil, for use in my Sunbeam worm drive! Who suggested this was just idle gossip? Sid Biberman avers that filling Vin twin boxes with EP90 makes them feel smoother (EP90 is about SAE40 vis). I've tried it. I can't honestly say I noticed: maybe it's me. I use ATF in Vin and Manx boxes (ATF is probably minus SAE20 vis ) with no problems, and Anyold SAE40 in the Rudge because it's never in there for long. Renold used to say that putting heavy oil in chaincases was fruitless because the chain just cut a channel in it and remained dry. 'iggins (The Prof) in MPH casually exploded the theory that making an oil bath for cams - the cam would dip into the cooling and lubricating oil on each rotation - was other than a waste of time. When (Volvo?) made one, c/w a perspex viewing rig, it was evident that all the oil was swept out of the cooling and lubricating bath on the first rotation and the cam remained dry thereafter. Not unrelated: was there a date when Burman changed to oil-filled boxes, or was it oil for some bikes, grease for others? [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Gearbox Sealing
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