Triumph Pre Unit 650 Black Diamond valve/guide kitKibblewhite 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

Most shops don't bother to even open the boxes when sending out engine parts

For SAE 30 "Break-In Oil" see here

Sizes include 1/8W

Black Diamond 750 6mm valve and guide kit

No curing or setting time is required

This kit is designed to service rocker boxes on all Unit 500 Triumph engines from 1958 to 1974

the keepers are split

The guides are machined for the included seals and do not need any additional machining for valve clearance

This twist grip is part number 313/2NG and fits 7/8" bars

TB1184 is a semi drying sealant

Seat pressure is 90# at 1

and 4 HT lower collars