| Listed in parts books | Not catalogued by year yet |
TACH DRIVE PLUG
Threaded left-hand-thread plug that seals the unused port on the tachometer drive body, replacing the older pressed-in welch plug.
This is the tach drive plug, part number 71-4131, a threaded plug that closes off the unused port on the tachometer drive body. Triumph moved to this threaded-plug design after the earlier pressed-in welch plug had a habit of working loose and falling out, so this one screws in and stays put.
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Note the left-hand thread on this one — worth keeping in mind if you're pulling it for inspection or replacing it, since it's easy to assume it's a standard right-hand fastener at a glance.
We don't have detailed catalog history on file for this specific part, so if you're not sure your gearbox uses the threaded-plug version versus the older welch plug type, give us a call and we'll help sort out what you've got before you order.
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