I ll go with using the original gaskets from yamaha,I,ve just rebuilt my engine and bought a gasket set off ebay only to be dissapointed with the quality and the handfull of rubber o rings which fitted nothing!went through both casing gaskets and had to buy original ones.
What I did find was that if I removed a casing after using the yamaha gasket compound on both sides of the gaskets it tore every time resulting in new gaskets,....when I spoke to the yam fellow he said don,t use any gasket compound as they come already partly coated. I,ve just fitted one to the clutch cover and it is partly coated.....may be I should have just put compound on one side only-I,m sure somebody will pop along and tell me if its correct.
Good luck...oh the other thing is I bought both 5th gears and cam chain and a set of rings only to find the rings were the most expensive out of all the parts!....
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