Triumph 500 Unit Black Diamond Valve/Guide Kits

Kibblewhite valves are the best you can get for your Triumph motorcycle. 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 and properly installed and finished, much tighter tolerances than factory can be used successfully for quieter operation, less friction, and much longer service life.

These intake valves are sized for the 1967-1974 Unit 500 heads. They may or may not fit earlier heads with the 1.430" intake valve, depending on the seat.

This valve kit is for the 500cc Unit construction that uses a "non squish band" head.  The valve head sizes are 1.540" intake and 1.325" exhaust. The manganese bronze valve guides are .501" standard, with oversizes of +.002, +.004", +.006", and +.015" only.

If you are building a Triumph Unit 500 or are rebuilding a head, these are the highest quality parts you can use. Oversize guides are available at the same price, and can be selected in the drop down menu. 

For Triumph 500cc Black Diamond valve installation notes click here

For Unit 500 "racing" spring kit click here

This kit is for 1967-1974 T100R, T100C, T100S, T100T, and TR5T unit construction models.  THESE VALVES WILL NOT FIT PRE UNIT 500 HEADS.