oil leaking from timing mark covers
my friend has a 1986 xt600z. he recently tried to check the tappets. when removing the circular crankcase cover to turn the engine round, oil poured out of it. this does not happen on my dommie. is this normal, i think not. if not would it likely to be a blown oil seal. are these hard to replace, ie can you take off the crankcase cover and replace it or do you have to split the engine crankcase. any ideas would be much appreciated.
thanks
oz
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