| Diagram | Fig. 24 — HANDLEBAR — CONTROLS — FUEL TANK · ref 39 |
| Subsystem | controls |
| Listed in parts books | 1971–1972, 1974, 1976–1977 |
FUEL LINE ASSY T140 71-78
Fuel line assembly for the T140 twin, running from the tank to the dual Amal carburetors.
This is the fuel line assembly for the T140 twin, part number 83-3927. It runs from the tank down to the pair of Amal carburetors, the dual-carb setup on these oil-in-frame Bonnevilles. The catalog shows it in use across mid-1970s production years, so if your parts book lists this same number you're in the right place.
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On these bikes the fuel line has to split and feed two carbs off the one tank outlet, so this is sold as the complete assembly rather than a single length of hose you'd cut down. It's a straightforward wear item - rubber and fittings age, especially if the bike's sat with old fuel in the system - so it's worth a look if you're seeing leaks, cracking, or a stale gas smell around the tank unions.
Double check the figure listing against your own bike before ordering, since the parts book ties this one to the oil-in-frame Bonneville production run and carb setup.
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