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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Smoking Engine
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<blockquote data-quote="timetraveller" data-source="post: 167383" data-attributes="member: 456"><p>I doubt that this will be the cause of your problems but if you have still left the original engine breather intact then the atmospheric breather on the valve cap and the timed breather are working against each other. Just block off the timed one somehow and then try again.</p><p></p><p>I am not sure what could cause the engine to smoke only after 50 miles but it would be worth checking the lower valve guides, just incase one takes some time to come loose and then tightens up when the engine cools down.</p><p></p><p>It might also be worth considering what oil you are using. If it is a thick oil then it could be that it takes that time to warm up and become thin enough to show up some other fault.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 167383, member: 456"] I doubt that this will be the cause of your problems but if you have still left the original engine breather intact then the atmospheric breather on the valve cap and the timed breather are working against each other. Just block off the timed one somehow and then try again. I am not sure what could cause the engine to smoke only after 50 miles but it would be worth checking the lower valve guides, just incase one takes some time to come loose and then tightens up when the engine cools down. It might also be worth considering what oil you are using. If it is a thick oil then it could be that it takes that time to warm up and become thin enough to show up some other fault. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Smoking Engine
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