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EXHAUST VALVE GUIDE NORTON 850 +.004 ROWE
Oversized (+.004 in.) exhaust valve guide for the Norton 850 engine.
This is an exhaust valve guide for the Norton 850 engine, oversized at +.004 in. for a worn or re-bored guide bore. The +.004 spec means it's meant for a cylinder head that's already had its guide bore opened up slightly, so it's not a direct drop into a standard-bore head without machining.
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This is a Norton part, not a Triumph one, so if you're working on a Commando or other Norton 850 twin, this is the guide to look at for the exhaust side. We don't have much more history on this specific listing beyond that spec, so give us a call if you want to talk through what head you're fitting it to before you order.
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