| Also known as | E3114 |
| Diagram | Fig. 14 — ENGINE UNIT FITTINGS AND FOOTRESTS · ref 20 |
| Subsystem | engine bottom |
| Listed in parts books | 1960–1962, 1964–1965, 1967–1968, 1970–1971 |
Crankshaft stud (1 7/16 in. O.A.)
Crankshaft stud, 1 7/16 in. overall length, for mounting rotor-end hardware on the unit twin crankshaft.
This is the crankshaft stud, 1 7/16 in. overall length, that shows up in the crankshaft and connecting rod section of the parts book, and also gets listed under engine unit fittings and footrests. It's the older-style number for this part; the legacy reference E3114 points to the same stud.
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A crankshaft stud like this is used to secure components mounted on the end of the crank, such as the rotor and its side plate, on unit-construction Triumph twins. It's a small piece of hardware, but it takes real clamping load, so if you're finding one stretched, cross-threaded, or the threads look chewed up, it's worth replacing rather than reusing.
Our catalog record shows this stud appearing across a run of unit twin engines from 1960 to 1971. Confirm against your specific crankcase and rotor setup before ordering, since crankshaft-end hardware changed over the years and later engines used a different stud arrangement.
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