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Blowing lots of oil - Rings???

Posted: Fri Apr 12, 2013 5:26 pm
by Skip
My bike is giving me a real nightmare; the first time I took it for a decent spin it covered its self in oil. I traced this to a breather pipe which had been disconnected from the airbox when the bike had another carb fitted. The oil pot was full of mayo and spew both mayo and oil out into the atmosphere (along with oil). I removed the pot and associated pipework and replaced it with longer items which vented just behind the numberplate via a pair of modern non-return valves rather than 'duck bills' which I couldn't find......... I thought I'd sorted the problem, but realise now that all I've been doing is treating the symptoms rather than the cause....... I work a little over 3 miles from home and by the time I get to work after a gentle trundle, there is a sheen of oil on the casing just behind the cylinder and a fairly comprehensive drip(s) from various other locations...... I suspect, because I think the bike has had a long lay up prior to my ownership, that one or more of the piston rings is perhaps 'stuck in' allowing the crank case to be pressurized beyond normal levels. No oil is burnt at all, so I'm ruling out worn valve guides etc. The bike has covered less than 5000 miles - anybody got any thoughts or suggestion as to what I do next as this is really starting to annoy my enjoyment of the bike! REgards & REspect Skip. Exeter.