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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
anti sumping valve
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<blockquote data-quote="Tom Gaynor" data-source="post: 19268" data-attributes="member: 4034"><p>I have a new two-start pump, fitted 4 or 5 years and about 10,000+ miles ago. (In the light of experience, I do not recommend two-start pumps: a wholly unnecessary waste of money.) But. It doesn't sump. Maybe I'm just lucky. I do however use the bike regularly, at least 2 or 3 times a week: that must be significant. I can't however say that it sumps much when left for several months in winter. That may be because the oil solidifies...</p><p>I followed the tip in KTB, and put a drain plug in the feed banjo bolt (A22). If you've a lathe, it can take all of 20 minutes to do. If not, maybe 30. Draining the oil now means getting it hot (always a pleasure, and much quicker since I lagged my UFM), removing a 1/4" BSF capscrew in the feed banjo bolt, and waiting until it stops running. Easy-peasy...</p><p>Every five or six oil changes I bite the bullet and change the filter. I have to say that either there IS no debris in my system, or that the filter is wholly ineffective. No prizes for guessing my assumption.</p><p>It's a motor remarkably tolerant of less than perfect maintenance: more evidence of Irving's genius. A Vincent engine will run perfectly well for 50,000 miles from new, with almost no attention. For a car, 50 years on, that's expected. For a motorcycle, 50 years ago, that was incredible.</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 19268, member: 4034"] I have a new two-start pump, fitted 4 or 5 years and about 10,000+ miles ago. (In the light of experience, I do not recommend two-start pumps: a wholly unnecessary waste of money.) But. It doesn't sump. Maybe I'm just lucky. I do however use the bike regularly, at least 2 or 3 times a week: that must be significant. I can't however say that it sumps much when left for several months in winter. That may be because the oil solidifies... I followed the tip in KTB, and put a drain plug in the feed banjo bolt (A22). If you've a lathe, it can take all of 20 minutes to do. If not, maybe 30. Draining the oil now means getting it hot (always a pleasure, and much quicker since I lagged my UFM), removing a 1/4" BSF capscrew in the feed banjo bolt, and waiting until it stops running. Easy-peasy... Every five or six oil changes I bite the bullet and change the filter. I have to say that either there IS no debris in my system, or that the filter is wholly ineffective. No prizes for guessing my assumption. It's a motor remarkably tolerant of less than perfect maintenance: more evidence of Irving's genius. A Vincent engine will run perfectly well for 50,000 miles from new, with almost no attention. For a car, 50 years on, that's expected. For a motorcycle, 50 years ago, that was incredible. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
anti sumping valve
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