| Listed in parts books | Not catalogued by year yet |
RING SET NORTON 500+.040
A +.040 oversize piston ring set for the Norton 500 engine.
This is a piston ring set for the Norton 500 engine, sized at +.040 over standard. That oversize figure tells you it's meant for a bore that's already been machined out during a rebuild, not a stock-bore engine. This is a Norton part, not a Triumph part, and it belongs in the engine top end alongside the pistons it's fitted to.
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We don't have much more detail on this one in our records beyond the ring set description and the oversize spec. If you're not certain which oversize your barrels have been bored to, check your rebuild paperwork or measure the bore before ordering, since ring sets are sized tight to the piston they're meant to seal.
Give the shop a call if you want to confirm this is the right set for your engine before you order.
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