Norton 600+

Norton continued

600cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side		Timing Side
-––	Side Valve Machines	––	––	––	––	––		––
1947-52	Big Four, 1	––	N3	––	SE51	––		––
-––	O.H.V. Machines	––	––	––	––	––		––
1933-58	19	E4099	N3	––	SE51	LS10	RL10L	RL10L

630cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side		Timing Side
-––	Side Valve Machines	––	––	––	––	––		––
1931-33	Big Four, 1, 14	––	N1	––	SE51	––		––
1933-54	Big Four, 1, 14	––	N3	––	SE51	LS10	RL10L	RL10L

750cc500cc, 600cc & 650cc Twins

Year	Model	Big end shell	Big end Std size		MAIN BEARINGS
––	––	No.	From	To	Drive Side		Timing Side
1964-68	Atlas	B2101LC	1.7500"	1.7505"	R330L		330
1968-on	750 & 850cc Commando	(23255 or 25384)	––	––	––		––

Norton under 600cc

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