Triumph 500 Mushroom Valve Adjuster SET made in USA unit only Norton Memorabilia Should fit all Guzzi loop-frame

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

Used on Triumph Hurricane

and they were the best they ever used

NOT suitable for desmo

Great insurance/protection for your very expensive oil cooler

Triumph 500 Mushroom Valve Adjuster SET made in USA unit only Norton Memorabilia Should fit all Guzzi loop-frameSuitable 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.