JAY-CB500T
Member
I have traced an excessive oil leak coming from the points cover. Oil is coming out of the seal behind the advancer.
While doing this inspection ive found a lot of up & down play in the end of the Exhaust Camshaft, the aluminium housing has worn so I replaced the housing with a better condition secondhand one and a new seal. All seemed OK until I went on a ride and come back to oil leaking out of the points cover again. So I think I need to replace the exhaust camshaft, it's quite difficult to measure while it's in the engine. But my question is, what has caused this excessive wear? I have rebuilt the engine and replaced all seals, gaskets, rings, professionally done honed barrels and lapped valves. The bike runs sweet as a nut in my opinion apart from this oil leak. I've followed videos for the rebuild, settting valve timings etc and fitted electronic ignition which all works great. I really don't want to put new parts on for the same issue to happen again.
While doing this inspection ive found a lot of up & down play in the end of the Exhaust Camshaft, the aluminium housing has worn so I replaced the housing with a better condition secondhand one and a new seal. All seemed OK until I went on a ride and come back to oil leaking out of the points cover again. So I think I need to replace the exhaust camshaft, it's quite difficult to measure while it's in the engine. But my question is, what has caused this excessive wear? I have rebuilt the engine and replaced all seals, gaskets, rings, professionally done honed barrels and lapped valves. The bike runs sweet as a nut in my opinion apart from this oil leak. I've followed videos for the rebuild, settting valve timings etc and fitted electronic ignition which all works great. I really don't want to put new parts on for the same issue to happen again.
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