| Also known as | 06-4286 |
| Listed in parts books | Not catalogued by year yet |
ROD INSERTS NORTON +.010 - ANDOVER
Set of .010 undersize big end bearing shells for a Norton twin with a reground crankshaft.
This is a set of connecting rod (big end) bearing inserts for a Norton twin, ground .010 inch undersize to match a reground crankshaft journal. The catalog lists it as "Rod Inserts Norton +.010 - Andover," which tells us these are the Andover-era Norton bearing shells rather than anything Triumph.
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Big end bearings sit between the connecting rod and the crank journal, and they take a beating over the life of an engine. When a crank has been reground to clean up wear or damage, it needs matching undersize shells like these to bring clearance back to spec. These come as a set, so you get the shells needed for the rebuild rather than piecing it together one at a time.
Our record on this part number is thin beyond the description itself, so if you're not certain your crank has been reground to the .010 undersize dimension, measure before you order. Call the shop if you want to talk through what you're working with.
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