Calthorpe

Unfortunately, Calthorpe motorcycles of the same model were not always manufactured to the same specification, and although our catalogue shows the bearings that are generally fitted it should only be used as a guide. It is useful to remember that each of the four Calthorpe bearings are of different shapes and if the pattern is available correct identification is simplified.

250cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side	Timing Side
-	O.H.V. models	-	-	-	-	-	-
1934-38	Ivory, Minor & R1	R1-19	C1	-	SE26	-	-

350cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side	Timing Side
-	O.H.V. models	-	-	-	-	-	-
1932-36	Ivory 3, K2, K4	D7-19	C2		SE26	-	-
1937-38	K5-37, K5-38	M5-19	C3		SE27	-	-
1937-38	K5-37, K5-38	M5-19	C3		SE27	-	-

500cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side	Timing Side
-	O.H.V. models	-	-	-	-	-	-
1932-35	Ivory IV & V, M1, M2, M3	M1-19	C2	-	SE27	-	-
1936-38	M4, M5	M5-19	C3	-	SE27	-	-
1939	M5-39	M5-19	C4	-	SE27	-	-

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