| Also known as | F4136 |
| Diagram | Fig. 13 — SWINGING FORK AND SUSPENSION UNITS · ref 32 |
| Subsystem | primary |
| Listed in parts books | 1960–1962, 1964–1968 |
BOLT,CHAIN GUARD MOUNT
Stepped bolt that mounts the chainguard to the swinging arm on mid-to-late 1960s Triumph twins.
This is the bolt that holds the chainguard to the swinging arm. It shows up in the parts books under the figures covering the swinging fork and suspension units, so it's part of the rear end hardware that keeps the chainguard bracketed in place rather than rattling loose against the chain.
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Older parts books list this one under F4136, which is just the pre-current-numbering form of the same physical bolt. Our records show it across catalog entries running from the mid to late 1960s, which puts it in the era of the swinging arm frame Triumphs before things moved on to later thread standards.
It's a small, specific piece of hardware, but it's not one to guess on. If you're rebuilding the rear end or chasing down a missing or stripped mounting bolt for the chainguard, this is the part number to have on the bench next to your parts book so you know which stepped bolt and thread combination your bike actually takes.
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