Z400 D 1978 o rings cylinder base??

Hi all,can anyone tell me if I'm supposed to put o rings before base gasket in grooves in engine or just the 2 oil o rings???
when stripped it was none in there...
Cheers

Use the O rings around the oil passages. Instead of a gasket you can use three bond to seal the cam chain tunnel and cylinder bores.
Oil will seep at these locations and produce a leak if not sealed.


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Thanks for reply
second rebuild as usual
using more threebond now
Cheers