| Diagram | Fig. 16 — FRAME · ref 24 |
| Subsystem | frame |
| Listed in parts books | 1974 |
PIPE HERRING BONE 5/16X9
An oil feed pipe (5/16 x 9) from the chaincase and chains section, used to route oil to the primary chain area.
71-3450 is an oil feed pipe listed under the CHAINCASE AND CHAINS section of the parts book, so it's tied into lubrication for the primary chain area. The catalog calls it a herringbone pipe, which refers to the braided or knurled outer pattern on this style of oil line rather than anything about its function - that pattern is common on these small feed pipes so they can be gripped and seated without a wrench chewing them up.
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The listing gives its length as 5/16 x 9, which is the size and length of the pipe itself. It shows up once in our records, tied to the 1974 model year, and it's a straightforward part - if the old one's split, cracked, or leaking at a union, this is the replacement to reach for.
Given how small and specific a piece this is, it's worth double checking the fitting ends and routing against what's coming off your bike before you order, since chaincase oil feed pipes can vary in small ways between years.
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