| Also known as | 70-0345 |
| Listed in parts books | Not catalogued by year yet |
VALVE GUIDE-TRID
Valve guide for Triumph triples cylinder heads, PN 70-6420/004 (formerly 70-0345).
This is a valve guide listed for the Triumph triples in the shop's records, carried under 70-6420/004 with an earlier catalog number of 70-0345. The /004 suffix suggests it's part of a sized or oversize series rather than a one-off part, though the catalog entry we have doesn't spell out the exact size step.
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A valve guide sits in the cylinder head and does what the name says - it guides the valve stem in a straight line as the valve opens and closes, keeping wear even and the valve seating correctly. It's a wear item that gets attention during a head rebuild or when someone's chasing an oil-smoking or valve-guttering problem.
We don't have much more detail on file for this one beyond what's above. If you're working on a triples head, give us a call with your head casting or the guide you're replacing so we can confirm this is the right size for your rebuild.
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