| Diagram | Fig. 5 — CYLINDER BLOCK AND HEAD TR7RV · ref 12 |
| Subsystem | engine top |
| Listed in parts books | 1974, 1976–1977 |
Cylinder head gasket
Copper cylinder head gasket, 10-stud, for the Triumph 750 twin top end (PN 71-3681).
This is the cylinder head gasket, part number 71-3681, for the 10-stud head arrangement used on the Triumph 750 twin. It shows up in the parts book under both the CYLINDER BLOCK AND HEAD TR7RV figure and the CYLINDER BLOCK AND HEAD, T140V figure, so it's the piece that seals the joint between the barrel and the head on these engines.
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It's a copper gasket, which is the standard material for this application - copper handles the heat cycling of an air-cooled top end and can be annealed and reused if you're careful, though most folks just fit a new one when the head comes off. Catalog appearances for this part number run 1974 through 1977.
If you're chasing a compression change or dealing with head warpage, this is the standard-thickness version. Confirm your stud count and head casting match before ordering since Triumph ran more than one head gasket configuration across the 750 twin's life.
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