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Any thoughts,

I'm doing a valve adjustment and I cant seem to get the closing shims off the end of the valve stem.
I have removed the split rings and the closing shims turn freely, but at the top of each one of my valves there seems to be a thin line about 3mm from the top of the valve stem the prevents the shim from being removed. The line preventing the shim from coming off is on all the valves and is too even to be a wear mark. There are also some stampings around the top of the valve stem. Something like EK5 or somthing similar to this.
Ideas? My local Duc shop is closed Mondays.

The bike is a 99 M900s with V2 heads and 13,000.

Thanks,
Ted
 

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Newer 2V Ducatis (1998 and up) seem to have a small groove cut near the top of the valve. The closing shim gets a little bit beat up with the stock collets(split rings) and gets mushroomed.

What does this mean for you?

Well, this mushroomed lip interferes with the line/groove near the top of the valve. And you get to spend some time sanding that groove down to allow the closing shim to come off.
 
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