Help with O ring identification please

[Mike_Berkshire]

I have just received a Vesrah gasket set for my '76 K2 550 and I have been sorting through the pack of O rings to work out what is what. DS sticking packing tape over the parts list on the back didn't help. I have all the O rings sorted and Im left with one query. There are 3 O rings given as part number 91303-035-000. Two of these are for around the oil control valves where crank case joins the barrels. I cant for the life of me work out what the third one is for; can anyone tell me?

Also, I rather foolishly believed that the plastic sealing discs that go in the head and cover the head bolts would be in the kit. Not so and at £5 each a bit of a shock. I have found 4 of the old ones but the other 4 must have ended up in the bin. I assume its advisable not to reuse these old ones or work with a mixed set?

[Nurse Julie]

I think it's for the tacho drive Mike or have you accounted for that one? . No, don't use the original head sealing washers (pucks as they are called).

[Sesman]

Or the clutch case operating arm shaft?

[Laverdaroo]

If you mean the pontefract cakes, yeah, just buy some new ones don’t reuse old ones. You might as well, you’re in there and there’s a chance that you don’t match the right one to the right hole and cause leakage etc and have to strip it down again

That other o ring, it’s not for the gear change lever through the case is it?


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