| Also known as | E7640 |
| Diagram | Fig. 13 — ENGINE FITTINGS AND EXHAUST SYSTEM · ref 24 |
| Subsystem | exhaust |
| Listed in parts books | 1968 |
Right exhaust pipe
Right-hand exhaust head pipe for the engine fittings and exhaust system, part 70-7640, later revised to 70-7639/4.
This is the right-hand exhaust pipe, part number 70-7640, also carried in older records under E7640. It's listed under the engine fittings and exhaust system section of the parts book, where it routes exhaust gas away from that cylinder to the muffler.
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The catalog shows this pipe appearing in 1968 listings, and the factory later revised it under a newer number, 70-7639/4, so if you're cross-referencing against a later parts book that's the number you may find instead. When you're sourcing one of these, check your frame and exhaust bracket setup against what you've currently got, since pipes like this are side-specific and shaped to route correctly on one side of the machine only.
If you're not sure whether your bike takes this exact pipe versus the later revised part, give the shop a call and we'll sort out which one you need before you order.
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