| Also known as | E3251 |
| Diagram | Fig. 3 — CYLINDER BARREL AND HEAD · ref 19 |
| Subsystem | engine top |
| Listed in parts books | 1963–1964 |
INLET ROCKER T20 CUB
Inlet rocker arm for the Triumph T20 Cub cylinder head.
This is the inlet rocker arm for the Triumph T20 Cub. It lives up in the cylinder head, riding on the rocker shaft, where it takes motion off the pushrod and transfers it to the inlet valve to open it at the right point in the cycle.
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We don't have a lot of catalog history on this particular number, but the part identity itself is clear enough from the description: it's the inlet-side rocker arm, specific to the T20 Cub engine, not a part that swaps over from the bigger twins.
If you're rebuilding a Cub head, check the rocker for wear at the valve pad and where it rides the shaft before you put it back in. Give us a call if you want us to confirm fitment on your particular Cub before ordering.
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