| Also known as | E8163 |
| Diagram | Fig. 10 — TIMING COVER AND CONTACT BREAKER · ref 10 |
| Subsystem | engine bottom |
| Listed in parts books | 1968, 1970–1971, 1973–1974, 1976–1980, 1983, 1985 |
WASHER AA BOLT 1/4X1/2
A plain 1/4 x 1/2 washer used under bolts across various Triumph timing cover, gear cluster, and electrical fittings.
Part number 70-8163, also listed as E8163, is a plain washer sized 1/4 x 1/2 that Triumph used under bolts in a number of locations around the engine and electrics. The catalog shows it turning up in timing cover work - both the standard contact breaker cover and the later magnetic pulse sensor covers - as well as around the gear cluster, crankcase timing gears, and even electrical equipment and exhaust side cover fittings.
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It's a small, plain fastener washer, the kind that spreads load under a bolt head or nut so it doesn't dig into the case or cover. Given how many different figures it shows up in across 1968 through 1985, this is one of those parts that got used wherever a 1/4 inch bolt needed a washer, not something tied to one specific assembly.
Worth keeping a few of these in a parts drawer since they show up in so many jobs on the timing side and elsewhere. Confirm the bolt you're working with actually calls for this size before you order.
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