Quote:
Originally Posted by scamandin
By rotocap, I'm guessing you mean the cap nut? They are fine. I even switched them to make sure.
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No under the valve spring there's a thing that spins (called a rotocap)...
The valve should close up against the seat in the head. If the valve spring is so old that it doesn't compress as much as it should then the valve might not be closed when you are measuring the clearance. If the rotocap is squashed / collapsed then you've got the possibility of a similar problem.
I'm thinking that you've either got one valve higher then the rest or 9 valves lower than they should be!
If you've got one high one then I'm betting you've got a valve seat problem. Not good news...
Some more data for you =>
The valve spring should be about 50mm long when unloaded (I can give you the exact length you should have if you pass on your spring colour codes).