| Also known as | E12888 |
| Diagram | CYLINDER BLOCK AND HEAD, TR6R, TR6C (EARLIER MODELS) |
| Subsystem | engine top |
| Listed in parts books | Not catalogued by year yet |
Bolt, cylinder head
Cylinder head bolt for unit 650 Triumph twins, used in the cylinder block and head assembly.
71-2888 is a cylinder head bolt for the unit 650 twins, showing up in the cylinder block and head diagrams for TR6R, TR6C, and T120R across both earlier and later variants in the 1972 parts books. If your book lists it under the older E12888 number, that's the same bolt under its pre-decimal designation.
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These bolts hold the head down to the barrel, and they're one of the fasteners you want torqued correctly and in the right pattern when you're buttoning up a top end. Given how the catalog splits it out across earlier and later T120R variants, it's worth double-checking your specific engine's head bolt layout before ordering a full set.
We don't have more detail on this one beyond its place in the cylinder block and head assembly. If you're rebuilding a top end from this era, bring your old bolt to the counter or check your parts book figure to make sure this is the right length and location for your engine.
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