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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Post war motorcycles
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<blockquote data-quote="robin" data-source="post: 113713" data-attributes="member: 2677"><p>I have oil in the rear inlet stub. </p><p>The sealed lower valve guides are new, cylinder compression is good, ignition is good and on cold start up the exhaust is clean. However, after about 15 minutes warm up, at a fast tick over, the rear cylinder cuts out and investigation shows that the inlet stub has a puddle of oil in it.</p><p>If a paraffin test is done, whilst the cylinder is cold, there is not any leakage.</p><p>Any ideas please. </p><p>New cylinder heads are expensive and welding an invisible hole is problematic.</p><p>Thank you.</p><p>Robin.</p></blockquote><p></p>
[QUOTE="robin, post: 113713, member: 2677"] I have oil in the rear inlet stub. The sealed lower valve guides are new, cylinder compression is good, ignition is good and on cold start up the exhaust is clean. However, after about 15 minutes warm up, at a fast tick over, the rear cylinder cuts out and investigation shows that the inlet stub has a puddle of oil in it. If a paraffin test is done, whilst the cylinder is cold, there is not any leakage. Any ideas please. New cylinder heads are expensive and welding an invisible hole is problematic. Thank you. Robin. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Post war motorcycles
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