[QUOTE=Pripyat;54611]I had read that the stock valves were smaller than 28/23. I measured the stock valves and they are almost identical to the 28/23 Taida head. Where did the smaller stock valve measurement come from or did I just read incorrect info? I'm wondering if the valve seats are different.
If your measuring a head off a Howett motor, The stock Howett heads come with the larger valves. Before aftermarket "performance" heads were available, Howett heads were a highly desirable item. At the time, most all of the gy6 manufacturers used a smaller valve head.
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