| Diagram | Fig. 2 — CYLINDER BARREL, EXHAUST PIPES, VALVES · ref 10 |
| Subsystem | engine top |
| Listed in parts books | 1969–1971 |
BSA Tube — exhaust pipe connecting
A BSA A65 exhaust balance/connecting tube linking the two exhaust pipes, cataloged for 1969–1971.
70-9890 is a connecting tube used in the exhaust system, listed in the catalog under CYLINDER BARREL — EXHAUST PIPES — VALVES. It's the piece that ties the two exhaust pipes together rather than a standalone header pipe, and it sits up at the cylinder barrel end of the exhaust run.
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The catalog record for this one ties it to the A65 platform, appearing across model years from 1969 to 1971 in the rows we have on file. This is a BSA part, not a Triumph one, so don't cross it over to a Triumph twin without checking your own parts book first.
If you're rebuilding the top end or doing an exhaust system refresh on an A65 from this era, this connecting tube is worth checking against your existing setup before you order — call the shop if you're not sure which pipe configuration your bike uses.
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