Triumph Pre Unit 650 Black Diamond valve/guide kit Valve guide size:+.050" manganese (.551") 343" and replaces Triumph part

343" and replaces Triumph part number 70-2904

They have a 3mm allen hex to adjust

and effective length is 8

and will work with stock Triumph 500

Triumph Pre Unit 650 Black Diamond valve/guide kit Valve guide size:+.050" manganese (.551") 343" and replaces Triumph partKibblewhite valves are the best you can get for your Triumph twin. Proven on the street, dirt, Bonneville Salt Flats, and race tracks everywhere, these are the legendary Black Diamond valves. These forged stainless valves are specially impregnated which makes the stems incredibly hard and wear resistant. The reduced friction is also better than hard chrome or nickel plating. Nothing even comes close in terms of longevity. When used with bronze guides