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Shop/Category/Fig. 1 — Engine: Crankshaft, Connecting Rods, Pistons, Camshaft, Timing Gear/Norton Piston Ring Set, Std., 850 Only
Norton Piston Ring Set, Std., 850 Only
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DiagramFig. 1 — Engine: Crankshaft, Connecting Rods, Pistons, Camshaft, Timing Gear · ref 41
Subsystemengine bottom
Listed in parts books1973

Norton Piston Ring Set, Std., 850 Only

Standard-size piston ring set for the 850 engine.

PN · R26640K

This is a standard-size piston ring set for the 850 engine, one of the parts that shows up in the crankshaft, connecting rod, and piston section of the parts book. The catalog only ties it to the 850 displacement and marks it as a standard-size fit rather than an oversize or rebore option.

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Ring sets like this go into the piston grooves to seal the cylinder and control oil, and this one is called out specifically for the 850 engine rather than being a general-fit item. Our record on this one is thin beyond that, so if you're rebuilding an 850 and need to confirm exact ring count or gauge before you order, give us a call and we'll sort it out with you.

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