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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Exhaust Tappet
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<blockquote data-quote="Marcus Bowden" data-source="post: 119329" data-attributes="member: 3287"><p>The last four years of my career I joined three ships on the East Coast of America at different intervals with a gang of two or four Philippines fitter / motormen purely to overhaul generators. Some times we would join and the generator was already stripped down with all pushrods in one rocker cover (little larger than Vincent covers) nine or five cylinder 18 or 10 rods respectively. When overhaul completed and started twenty thirty hours later tappets would be rattling, adjusted, 100 hours again 200 again, 500 again. When something has been running together for extended service they all wear differently. If my gang and I did an engine the pushrods would be marked at the top with a centre pop mark for inlet and two marks for exhaust and placed in the individual rocker covers along with the matching rocker assemblies. When started it would run to the next service interval 1,500 hours.</p><p> With my bike pushrods, they are marked 1,2,3&4 put into a lathe on top speed and lapped into each follower & tappet sockets gyrated with fine past then jewellers rouge. The test is, rod into a socket with a dab of oil and rod should stay there with it gyrated around for a few seconds hanging on surface tension. very seldom do I adjust tappets.</p><p>bananaman</p></blockquote><p></p>
[QUOTE="Marcus Bowden, post: 119329, member: 3287"] The last four years of my career I joined three ships on the East Coast of America at different intervals with a gang of two or four Philippines fitter / motormen purely to overhaul generators. Some times we would join and the generator was already stripped down with all pushrods in one rocker cover (little larger than Vincent covers) nine or five cylinder 18 or 10 rods respectively. When overhaul completed and started twenty thirty hours later tappets would be rattling, adjusted, 100 hours again 200 again, 500 again. When something has been running together for extended service they all wear differently. If my gang and I did an engine the pushrods would be marked at the top with a centre pop mark for inlet and two marks for exhaust and placed in the individual rocker covers along with the matching rocker assemblies. When started it would run to the next service interval 1,500 hours. With my bike pushrods, they are marked 1,2,3&4 put into a lathe on top speed and lapped into each follower & tappet sockets gyrated with fine past then jewellers rouge. The test is, rod into a socket with a dab of oil and rod should stay there with it gyrated around for a few seconds hanging on surface tension. very seldom do I adjust tappets. bananaman [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Exhaust Tappet
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