Big End Catalogue
A.J.S. A.J.S. models 14,14S,14CS, 14CSR, 8 (light 350) and 7R all employ crankpins that are rather slender and which are subject to frequent breakage. To overcome this difficulty Alpha Bearings can bore out the flywheels and fit oversize crankpins that are most satisfactory in service. Alpha Bearings also offers a range of two part crankpins for engines employing: AMC5, AMC6, AMC7, AMC8 AMC12L, AMC12S, AMC12LX & AMC20. The use of the conversion pin AMC12LX is strongly advised for 7R engines. The exact point when the AMC5 was replaced by the larger AMC6 is not certain. Please check the press fit dimension to make certain the correct replacement bearing is ordered.
500 cc
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 | - |
- |
- |
- |
- |
- |
- |
- |
| 1928-30 | K9, M9 | WHT |
AMCWE |
- |
- |
- |
- |
- |
- |
| 1930 | R9 . . . . . . . . . . . . . . . . . | - |
AMCS2 |
- |
- |
- |
- |
- |
- |
| 1931-36 | S9, T9, 33-9, 34-9, 35-9, 36-9 | WHT |
AMCS2 |
- |
- |
- |
- |
- |
- |
| 1935-37 | 4, 19, 14 | - |
AMCLC |
K2 |
SE1 |
- |
- |
- |
- |
- |
O H V Models | - |
- |
- |
- |
- |
- |
- |
- |
| 1930-36 | R8, S8, 33-8, 34-8, 35-8, 36-8 | WHT.K |
AMCS2 |
- |
- |
- |
- |
- |
- |
| 1931-35 | SB8, TB8, 33-B8, 34-B8, 35-18, 36-18 | WHT |
AMCS2 |
- |
- |
- |
- |
- |
- |
| 1937-40 | 8, 9, 18 | WHT |
AMC6 |
K3 |
SE1 |
- |
- |
- |
- |
| 1946-53 | 18, 18S, 18C | WHT |
AMC6 |
K3 |
SE1 |
LS10 |
LS10 |
STD650 |
|
| 1954 | 18S, 18C, 18CS | WHT |
AMC6 |
K3 |
SE1 |
LS10 |
LS10 |
017489 |
|
| 1955-63 | 18S, 18C | WHT |
AMC6 |
K3 |
SE1 |
LS10 |
LS10 |
021481 |
|
| 1955 | 18CS. . . . . . . . . . . . . . . . . | WHT |
AMC6 |
K3 |
SE1 |
MS10 |
LS10 |
021962 |
|
| 1956 | 18CS. . . . . . . . . . . . . . . . . | WHT |
AMC12 |
K51 |
SE1 |
MS10 |
LS10 |
023346 |
|
| 1964-66 | 18, 18CS | - |
AMC20 |
K51 |
SE1 |
MS10 |
LS10 |
RL10L |
030184 |
AJS 250 & 350 cc
AJS 500cc+ Twins