The rear of the motorbike seat is support by seat springs

FLST 1986-1994

they won't disintegrate after being on your bike for a year

Sold in pairs as pictured

These threaded steel bungs are 3/4" diameter and are drilled and tapped all the way through with 3/8"-16 thread

Rocker Box Caps / Covers for Triumph Motorcycles 1963 - 1972 - Chrome Vendor_Zodiac The rear of the motorbikeThese finned, hex rocker box caps fit Triumph motorcycles 1963 all the way through 1972. In 1973 the rocker box inspection cover changed to the large single oval style and these won't fit. Chrome plated, this set of four covers includes sealing washers to keep that shiny motor looking fresh and clean.