Well I just spent $80 on Cometic gasket set this week. unfortunately I am still not running to say if it was just a case of more money than brains. There are a few bugs at play and I had two failures and a that time I had Winderossa gasket . So I eliminated that possibility. Also learned that there is a direction on installing a head gasket on my Invader. Apparently the steel ring is wider on one side than the other. And I was told too put the wide side down to the cylinder. Something about drawing the heat up out of the cylinder. Not sure if this makes sense, but I followed recommendations since I have my fair share of aluminum ash trays on my work bench.