I recently purchased some new power valves, (Center, LH and RH) and received them yesterday. I installed the center valve, and began installing the LH and RH valves. During Timing, I found it difficult to time the RH valve with the LH valve. Upon further inspection of the valves, I found that the NEW RH valve differed from the old RH valve SUBSTANTIALLY. The slot where the center valve pin rides was rotated (in comparison to the old RH valve).
The RH Valve part number I ordered was 12005-1110. Could they have mis-bagged a KX 250 valve or something??
Here are some pics showing what I'm talking about. The new RH valve is on the left, and the old RH valve is on the right.