| Also known as | E3750 |
| Diagram | Fig. 6 — CYLINDER BLOCK AND HEAD · ref 40 |
| Subsystem | engine top |
| Listed in parts books | 1964–1970, 1974 |
ROCKER ARM T100 UNIT - EX L/H, IN R/H
Exhaust (L/H) and intake (R/H) rocker arm for the unit-construction T100 cylinder head.
70-3750 is a rocker arm for the unit-construction T100 twin, part of the valve gear up in the cylinder head. This particular number covers the exhaust rocker on the left-hand side and the intake rocker on the right-hand side, so before you order, make sure you know which position you're filling on the head.
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This part shows up across the cylinder block and head sections for the 3TA, T90, T100S, T100C, T100R, and T100T figures in our catalog, meaning it was used broadly across that smaller unit-twin family rather than being a one-year part. You may also see it listed under its older E3750 number if you're working from an earlier parts book.
Rocker arms like this pivot on a shaft and transfer motion from the pushrod (or cam follower) down to the valve, so wear here shows up as noise or loose valve clearances at the top end. If you're rebuilding a head, it's worth checking the rocker bore and the pad that contacts the valve stem for wear at the same time you replace or inspect this part.
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