| Also known as | E4159 |
| Diagram | Fig. 23 — OIL TANK · ref 32 |
| Subsystem | engine bottom |
| Listed in parts books | 1960–1962, 1964–1965 |
ROCKER OIL FEED PIPE - LONG STYLE 650 TRIUMPH UNIT/PREUNIT
Long-style rocker oil feed pipe for the 650 Triumph unit/pre-unit twin, running oil from the tank up to the rocker box.
This is the long-style rocker oil feed pipe for the 650 Triumph twin, catalogued for both unit and pre-unit engines. It carries oil up to the rocker box, feeding the top end of the motor from the oil tank. The older alias E4159 is the same physical part under the legacy letter-prefix numbering.
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It shows up in the oil tank figures of the parts books, which tells you it connects at the tank end and routes up to the rockers, but our records don't spell out every bend and fitting along the way. Catalog appearances run from 1960 to 1965, so that's the window we can confirm from what's in front of us.
If you're matching this against a pipe already on the bike, take a close look at the casting angle where it meets the rocker box before you order, since Triumph used more than one style here across the years. Give the shop a call if you're not sure which one your bike needs.
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