Royal Enfield-350

Royal Enfield

Owners of an Indian Enfield "Bullet" engines currently supplied with the original design of floating bush big end bearing will be pleased to learn that the roller bearing conversion is a direct replacement. No additional work is required other than the standard fitting procedure. The roller bearing conversion for both the Royal and Indian Enfield machines can give substantially better service than the floating bush assembly. Many early Royal Enfield machines use discrete main bearings comprising; Main shaft, cage, rollers and outer race. All of these items are manufactured by Alpha Bearings and have been shown below with the corresponding REM part numbers.

125cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side		Timing Side
––	Two Stroke Models	––	––	––	––	––	––	––
1939-45	Royal Baby, RB, RE125 & Ex WD	W27420	RE1N	––	SE70	115	315	315
1943-50	RE, RE125	W27420	RE1W	––	SE70	115	315	315

150cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side		Timing Side
1934-36	"T"	W20642	RE3	––	SE71
1953-62	Ensign, Prince	W27420	RE1W	––	SE70	120	120	120	120

225cc

Year	Model	Con rod casting No.	Big end Part No.	Cage Part No	Small end Part No.	MAIN BEARINGS
						Drive Side		Timing Side
	Two Stroke Models
1928-32	A, AC	––	RE4	K23	SE72
1932-40	A, AC	W16935 SE237	RE4	K23	SE72
1951-53	S	W21346	RE12S	K60	SE64	REM1	Shaft		REM3
						REM7	Race		REM9
						REM19	Cage		REM13

250cc (roller bearing models)

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 Models
1935-36	B	WHT	RE6¾		SE64
	O.H.V. Models
1932-34	B, Bullet	––	RE5	––	SE71
1934-40	S, S2, SS, Bullet	W21346	RE6 ¹¹/₁₆	––	SE64
1936	S	W21346	RE6⁵/₈	––	SE64
1954-57	Clipper	W39546	RE12	K61	SE64	REM2	Shaft		REM3
						REM7	Race		REM9
						REM19	Cage		REM13

250cc (plain Bearing models)

Year	Model	Big end Shell No.	Big end journal Standard size & tolerance	Small end Part No.	MAIN BEARINGS
Year	Model	Big end Shell No.	Big end journal Standard size & tolerance	Small end Part No.	Drive Side	Timing Side
1958-66	Clipper	GS9387	1.7495-1.750	Please return the con rod.
1957-66	Crusader, Crusader Sports	W39014	1.7495-1.750		135	R135
1963-66	Continental	W46709	1.7495-1.750

Royal Enfield 350cc

Royal Enfield 500cc & over

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