These full radius steel bungs are 1" long x 3/4" diameter and are 3/8"-16 thread

O-ring sealed idle mixture screw: Ensures precise adjustments and prevents leaks

Main Jet: 125 (T120/T140 twin-carb 650/750 models use a 130 main jet)

glass not cheap plastic knockoffs

There has been no compromise in quality and authenticity

Rocker Box Caps / Covers - Starburst MCM Style - for Triumph Motorcycles 1963 - 1972 Subcategory_Fender Mounts & Brackets These full radius steel bungsThese really cool, cast aluminum Triumph rocker box inspection caps are reproductions of the rare MCM Starburst caps of the 1950's and 60's. These fit unit Triumph motorcycles 1963 1972. You get four of these trick rocker caps with your purchase.