Valve intall tool

Has anyone ever used one of these. If so what size are the valve stems on an 09 YZ250F and how well do they work

A cheaper alternative would be to just get a socket roughly the same diameter as the valve retainers, and put a stick magnet through the socket. As you push down on the socket and compress the valve spring, the magnet will pull out the valve keepers.

I have the head apart, just looking for a tool to put it back together

Then just rest the valve keepers in their position and use a socket to push down on the retainer/valve spring and the valve keepers should fall into place. That's what I always do.

I'm sure that tool would work fine, but I was just trying to save you $50.

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