Triumph 500 Mushroom Valve Adjuster SET made in USA unit only Norton Memorabilia Includes o-rings for the larger

Includes o-rings for the larger plugs

This listing is for the one stack

Should fit all Guzzi loop-frame twin until '74 or so

(You Norton guys shut up

Matching stainless seat knobs available in my store

Triumph 500 Mushroom Valve Adjuster SET made in USA unit only Norton Memorabilia Includes o-rings for the largerSuitable for UNIT Triumph 500 twin engines. 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.