Bearing, mainshaft, roller, Hoffmanfor Norton single cylinder engines. This bearing is a roller bearing. Early engines have two bearings, later engines have two rollers and a single row ball bearing. Use the double row ball bearings as an alternative - they were used on all military Nortons. OR use the roller bearing withou tthe lip and use a spacer as used on International engines. Original Part Number: 9033; A2/30; 17704 - Mainshaft ball bearing driving side 8858; A2/32; 17702 - Mainshaft roller bearings
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