| Diagram | Fig. 26 — Exhausts, Mufflers, Passenger Footpegs · ref 1 |
| Subsystem | exhaust |
| Listed in parts books | 1975 |
Norton Tube, Cross
Exhaust balance (cross) tube connecting the head pipes on a Norton Commando, part 06-6332.
This is the exhaust balance tube (cross tube) for the Norton Commando twin, part number 06-6332. It's the small pipe that connects the two exhaust head pipes together underneath the engine, letting the two cylinders share exhaust pulses to even out backpressure and smooth the exhaust note.
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It sits low in the exhaust system, between the head pipes and ahead of the mufflers, and it's a wear item that rusts through or cracks at the welds over time since it takes a lot of heat cycling. The catalog record ties this one to the Commando line, with a single appearance logged for 1975.
If you're replacing your balance tube, check the condition of the head pipes and clamps around it too, since a leak at the tube often shows up as leaks or blowing at the joints on either side.
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