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Bearing
numbers listed shown are the numbers used by one of the original
suppliers. BSA used a number of different companies to supply bearings and
the numbers listed can easily be cross referenced by a bearing factor to
the modern equivalent where available.
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Clutch
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Clutch
loose: 1/4x1/4 rollers Qty
22
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Steering
head cups and cones loose: 1/4dia.
Ball bearings Qty 40
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Front
wheel bearing:
2K1178X and
2K1130N1 (inners and outers numbered separately)
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Rear
wheel bearing: 2K05079
and 2Ko5185
(inners and outers numbered separately)
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The
rear wheel bearings can be replaced with a modern equivalent, Bearing:
no.30204
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Engine
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Timing
side lipped roller: MRJA7/8
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Timing
side ball:
RHP MJ
7/8" - SKF RMS7 - FAG MS-9
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Drive
side lipped roller:
MRJA25
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Drive
side ball: 6205C3
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Engine
main bearings should be a C3 class fit. Specify this when ordering.
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Gearbox
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Gearbox
main bearing:
6207
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Gearbox
mainshaft bearing (Kickstart end): LJ3/4
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Magdyno
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Dynamo
bearing (drive end): 6202
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Dynamo
bearing (Brush end, 60 watt only): 608
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Wartime
45watt ‘short body’ dynamos were fitted with an ‘Oilite’ bush on
the brush end. of the armature. The 60watt ‘long body’ dynamo was
introduced in 1954 and replaced the earlier type. This later type is
frequently found on earlier machines.
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Magneto
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Points
end bearing: E15
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Drive
end bearing. Two types of drive end bearing were used in Lucas
‘Magdyno’ mags. The periods of use overlapped each other so it is not
possible to be specific about which type would be used in a given year as
this period of change coincided with the late pre war and wartime
period.
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Type
1:
N3048
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Type
2: E15
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The
E15 is the more common and later type. N3048 is generally no longer
available.
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