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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="greg brillus" data-source="post: 165527" data-attributes="member: 597"><p>Hi Marcus, I figured the mod was no different to the outer exhaust lobe, that gets oil fed constantly via the hollow section between the bushes........trying to "Time" the oil delivery is very hit and miss with the plunger strokes of the stock pump at any rate.......My race single runs a similar pump to yours....a Suzuki DR 250 dirt bike pump that runs at the same speed as the large idler, or 1/3 rd of crank speed.......and it only feeds the cam spindle.......the stock single start pump feeds the crank only. I have no idea what the secondary pump puts out in pressure, only that when you spin it over the oil squirting out of the hole in each cam lobe is impressive.......with previous failures of cams/followers in other race engines I've had, I figures an excess of oil here could do no harm........it would appear to me that its not so much an oil issue, but poorly made or a miss match of materials used that causes premature failure here.......Cheers......Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 165527, member: 597"] Hi Marcus, I figured the mod was no different to the outer exhaust lobe, that gets oil fed constantly via the hollow section between the bushes........trying to "Time" the oil delivery is very hit and miss with the plunger strokes of the stock pump at any rate.......My race single runs a similar pump to yours....a Suzuki DR 250 dirt bike pump that runs at the same speed as the large idler, or 1/3 rd of crank speed.......and it only feeds the cam spindle.......the stock single start pump feeds the crank only. I have no idea what the secondary pump puts out in pressure, only that when you spin it over the oil squirting out of the hole in each cam lobe is impressive.......with previous failures of cams/followers in other race engines I've had, I figures an excess of oil here could do no harm........it would appear to me that its not so much an oil issue, but poorly made or a miss match of materials used that causes premature failure here.......Cheers......Greg. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Pump and Oiling Sytem Modifications
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