| Diagram | Fig. 13 — SWINGING FORK AND SUSPENSION UNITS · ref 20 |
| Subsystem | primary |
| Listed in parts books | 1964–1968 |
Spring, 145 Ibs. Blue/Yellow 2 6T
A 145 lb rear suspension spring, blue/yellow coded, for the swinging fork suspension units listed against the 6T.
SA253/5 is a rear suspension spring, rated 145 lbs and marked with blue and yellow paint for identification. It's called out in the shop's swinging fork and suspension unit figures, so it's part of the rear shock assembly rather than anything front-end or engine related.
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The canonical description lists it against the 6T, and it shows up across catalog appearances from 1964 through 1968. Suspension springs like this one work in pairs on most twins, so check what your other side is fitted with before ordering just one.
The manufacturer tag on this part number says Amal, but Amal made carburetors, not suspension springs - that tag doesn't match what the part actually is. This is a rear shock spring, plain and simple, identified by its rating and paint code.
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