M20/21 SINGLE SPRING CLUTCH
Also known as the AA clutch.
!

CLUTCH PUSH ROD
15-4261
!
DIAM 1/4"
LENGTH 12 3/4"  (=313mm)
Alt number 29-3477
M20/21 >1947, C11G 1954-57

CLUTCH CENTRE AA TYPE
15-4306
!

AA CLUTCH STEEL PLATE INTERNAL LIPS
15-4307
!
Outer diameter 126,3mm, Inner 86mm, inside lips 77,6mm
Need 3  of these per bike. AA clutch = central spring clutch.
For external lip plates see 66-3812

CENTRAL CLUTCH NUT
15-4312
!
Clutch nut M20. This is the central nut in many BSA’s and it has often been hammered!

GASKET UNDER BOWLERHAT
15-4316
!
Gasket for the central clutch cover

CLUTCH ROLLER
26-0650
!
M20/21 USE 22 of these 1/4" x 5/16" rollers
A7 >1950 needs 18x

STEEL PLATE AA CLUTCH EXTERNAL LIPS
66-3812
!

Outer diameter including lips 132,6mm, inner diameter 90mm, lips 9mm wideFor internal lips see 15-4307
Need 4  of these per bike.
AA clutch = central spring clutch.

AA CLUTCH DRUM
68-3809
!
NEW
Brand new clutch housing for the single spring clutch. Impressive quality.  British Made.