MATCHLESS

Many of the Matchless singles employ crankpins that have very small shank or press fit diameters. All Crankpins supplied by Alpha Bearings benefit from a two piece design with the exceptions of "Lightweight" models and the original "conversion" bearing for the G50. Alpha Bearings has for many years offered a service of re-boring the crankpin holes and manufacturing a much more substantial crankpin. Although there are significant improvements in using a two piece crankpin the flywheel design is not considered to be invincible.

250 cc

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

––

––

––

––

––

––

1930-33 D2, F4, G2, G7, Sports & Clubman (ohv)

WHT

AMC4

––

SE1

LS9

LS9

STD650

1958-60 G2,G2CS

WHT

AMC14

K50

SE143

LS9

LS9

042239

1961-63 14, 14S after engine no.10367

042225

AMC14L

K50

SE143

MS10

RLS9

1961-63 G2CS, G2CSR

043021

AMC17H

K51

SE143

MS10

RLS9

 

350 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

––

––

––

––

––

––

1924-31 D. L4

L/4 E318(H)

AMC/Taper

––

SE1

LS9

LS9

STD650

––

O.H.V. models

––

––

––

––

––

––

––

1933-35 D3

D/8E 1816

AMCSU

K6

SE1

     
1935-36 D3

WHT P

AMCLC

K7

SE1

     
1937-39 G3

WHT

AMC5

K3

SE1

     
1940-52 Clubman, G3, G3/4, G4 & Special

WHT

AMC6

K3

SE1

     
1940-51 G3L, G3LS & G3LC

WHT

AMC6

K3

SE1

LS10

LS10

STD650

1952-53 G3LS, G3LC & G3LCS

WHT

AMC6

K3

SE1

LS10

LS10

017489

1954 G3LS, G3LC & G3LCS

WHT

AMC6

K3

SE1

LS10

LS10

021481

1955-63 G3LS, G3LC

WHT

AMC6

K3

SE1

MS10

LS10

021962

1955 G3LCS

WHT

AMC6

K3

SE1

MS10

LS10

021962

1956-59 G3LCS

WHT

AMC12

K51

SE1

MS10

LS10

1960 G5

44023

AMC17

K51

SE143

LS9

LS9

042239

1961-63 G5

44023

AMC17

K51

SE143

MS10

RLS9

1964-66 G3 & G3C

-

AMC20

K51

SE1

MS10

LS10

RL10L

030184

 

400 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

––

––

––

––

––

––

1930-33 Silver Arrow

––

AMC9S

––

Matchless 500cc and over

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