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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: 165503" data-attributes="member: 597"><p>Stu, I'm not sure of the availability of any Mk 3 cams....... generally i have bought my new cams from Neal Videan here in Australia........he only supplies the stock profile Mk 1 and Mk 2 grinds........i have not had any issues with them, and even the Mk 1 type with new followers do not seem to be noisey at all........i am very weary of any Vincent cams on account of several failures I've seen........But i put most of these down to poor materials or grinding process (or lack of) in their manufacture........On the mods that Marcus carries out on the spindles....... I do a similar mod but not the spindles, i machine a radial groove within the inboard cam bush ( the one closest to the crank case) in line with the existing lobe feed hole, but also in line with the innermost hole in the cam spindle.........This increases the feed to the inner (inlet) lobe to what it should be instead of the tiny timed squirt that it receives in stock form.......how the inlet lobe and follower survive here at all is a complete mistery........Think about the "Timed squirt" that it gets as the hole in the spindle and the hole in the cam lobe line up for a fraction of a second........crazy.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 165503, member: 597"] Stu, I'm not sure of the availability of any Mk 3 cams....... generally i have bought my new cams from Neal Videan here in Australia........he only supplies the stock profile Mk 1 and Mk 2 grinds........i have not had any issues with them, and even the Mk 1 type with new followers do not seem to be noisey at all........i am very weary of any Vincent cams on account of several failures I've seen........But i put most of these down to poor materials or grinding process (or lack of) in their manufacture........On the mods that Marcus carries out on the spindles....... I do a similar mod but not the spindles, i machine a radial groove within the inboard cam bush ( the one closest to the crank case) in line with the existing lobe feed hole, but also in line with the innermost hole in the cam spindle.........This increases the feed to the inner (inlet) lobe to what it should be instead of the tiny timed squirt that it receives in stock form.......how the inlet lobe and follower survive here at all is a complete mistery........Think about the "Timed squirt" that it gets as the hole in the spindle and the hole in the cam lobe line up for a fraction of a second........crazy. [/QUOTE]
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Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Pump and Oiling Sytem Modifications
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