Suitable for Triumph 650 and 750 twin engines through 1977.

The only adjusters you should use in your vintage British machine, period.  American-made, Rockwell hardness 60, micro-finished 'mushroom' head.  

These adjusters create a wide valve contact area, improving the sometimes dubious geometry of high-performance British pushrod ohv engines.  No more pitted valve stems.

I will answer questions promptly, good luck and thanks for looking.