| Also known as | E9494 |
| Diagram | Fig. 2 — CRANKCASE · ref 24 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970, 1974 |
BEARING 500 CRANK TIMING SIDE 1969-74, A10 GEAR/BOX FAG S. KOREA
Timing-side crankshaft main bearing for Triumph 350/500 unit twins, catalog number 70-9494.
70-9494 is the timing-side main bearing for the crankshaft on Triumph's 350 and 500 unit-construction twins. It sits in the crankcase on the timing side, carrying the crank and letting it spin true against the timing gear cluster. The catalog also lists it against an A10 gearbox reference, so if you're cross-checking parts books on either side you'll see it show up more than once.
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This one appears in the crankcase section of the parts books with a catalog span running 1969 into the early '70s. The alias E9494 is just the older-style part number for the same physical bearing, so if your book or an old invoice shows that number, you're looking at the same component.
Any time you're pulling the crank for inspection or rebuild, this bearing is worth a look — wear here shows up as play or noise on the timing side. Bring us your old one or the numbers off your parts book if you're not sure it's an exact match for your engine.
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