| Also known as | E8166 |
| Diagram | Fig. 3 — GEAR CLUSTER AND TIMING COVERS · ref 110 |
| Subsystem | engine bottom |
| Listed in parts books | 1968, 1970 |
Contact breaker lead sleeve
An insulating sleeve that protects the contact breaker lead as it passes through the timing cover on unit Triumph twins.
70-8166 is the sleeve that protects the contact breaker lead where it runs through the timing cover area on unit-construction Triumph twins. It's a small insulating piece that keeps the wire to the points from chafing against metal as it passes through the case, which matters since a worn-through lead here can short out your ignition. The legacy number for this part is E8166, so if you're working from an older parts book you may see it listed that way.
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It shows up in the parts books under both the gearbox cluster/timing cover figure and the electrical equipment figure, since it sits right at the boundary between the two systems - mechanical on one side, electrical on the other. Catalog listings for this one run from 1968 to 1970.
It's a minor item but not one to overlook if you're chasing an intermittent ignition fault or doing a full timing cover job. Give us a call if you want to confirm it matches what's on your bike before ordering.
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