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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Oil Use
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<blockquote data-quote="davidd" data-source="post: 46751" data-attributes="member: 1177"><p>Martyn,</p><p></p><p>Very Nice! I am glad that you efforts were rewarded. It is also nice to know that in all probability your blow-by is at a minimum. I think your comments on the contents of the catch can are also good. The wayward oil contains a small percentage of fuel and water which makes its banishment worthwhile. </p><p></p><p>I am still curious about the placement of the spindle slot. If I knew it was different on a Comet I certainly had forgotten. I checked a spare engine for the Grey Flash and it was face down. I check the Flash itself and it was not face down but it was pointing toward the rear axle. It was as far down as it could be and still remain behind the shroud. I don't believe it had spun because I used this engine for years and never had an issue. Because I work on mostly non-stock motors, I never use the markings. So if the spindle had moved I would have re-timed it without knowing. I ran this engine until June of 2009 with the stock breather and I only remember emptying it at the annual check. I stopped using the stock breather because on the next engine I decided to leave the breather pinion out and use the Ducati breather. Because you have a blank-off plate on the generator hole anyway, it is simple to mount a breather there. I do not have a catch tank on the racer as nothing has ever ventured out.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 46751, member: 1177"] Martyn, Very Nice! I am glad that you efforts were rewarded. It is also nice to know that in all probability your blow-by is at a minimum. I think your comments on the contents of the catch can are also good. The wayward oil contains a small percentage of fuel and water which makes its banishment worthwhile. I am still curious about the placement of the spindle slot. If I knew it was different on a Comet I certainly had forgotten. I checked a spare engine for the Grey Flash and it was face down. I check the Flash itself and it was not face down but it was pointing toward the rear axle. It was as far down as it could be and still remain behind the shroud. I don't believe it had spun because I used this engine for years and never had an issue. Because I work on mostly non-stock motors, I never use the markings. So if the spindle had moved I would have re-timed it without knowing. I ran this engine until June of 2009 with the stock breather and I only remember emptying it at the annual check. I stopped using the stock breather because on the next engine I decided to leave the breather pinion out and use the Ducati breather. Because you have a blank-off plate on the generator hole anyway, it is simple to mount a breather there. I do not have a catch tank on the racer as nothing has ever ventured out. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Oil Use
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