Also see; Big End Shells

We have a very large range of bearings, both new old stock and remanufactured. We also carry crankpin big end assemblies. Search thecatalogue by part number

Period bearing manufacturers were SKF, Hoffman, RHP, Torrington, Timken and Ransome & Marles. Our main stock of bearings are genuine new old stock. We also stock INA/FAG Bearings. You should beware of cheap, pattern imitations!

This page is currently in progress, please search the catalogue using part numbers.


Part# Cross Ref numbers Description Model

Needle Roller Timing Side Bearing Conversion Kit

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BSA C15/B40
70-1591 MJ 1 1/8 – MS11 – RMS9 Ball Bearing
D/S Crank ’39-59
T/S Crank ’54-59
Triumph T100
70-1592 MJ1 – RMS8 – MS10 – BRM1 T/S Ball Bearing Triumph 1939 T100 ’39-47
70-2877   T/S Roller Bearing Triumph T100/T120 ’50-53
57-0448 LJ31.7 Gearbox High Gear Bearing LH Triumph T100 ’39-59
S35-7 RLS6 Gearbox mainshaft Bearing RH Triumph T100 ’39-59
70-3835 SKF6306 – MJ30 Main Bearing DS Triumph T100 ’60-68
70-9493 SKF NF306 – MRJA30 Main Bearing DS
Triumph T100 ’69-74
70-7850   Needle Roller bearing – Conrod bigend BSA Late B40/B50/B44


Crankshaft Main Bearings

Part# Description Model
SKF6209 Ball Bearing, Crankshaft drive side Royal Enfield Twins 500/700/750
N209 Roller Bearing, Crankshaft timing side Royal Enfield Twins 500/700/750
06-4118 Crankshaft Main Bearing, FAG Superblend (Brass) Replaces 06-3114 Norton Commando

Crankshaft Driveside Main Roller Bearing

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BSA A7/A10 1949-63
Ariel Huntmaster 1954-59

Other Bearings


Part# Cross Ref numbers Description Model
N4965 SKF 10-1-132655 Hoffman Double Row Bearing Vauxhall/Sunbeam
W0897 Rear Wheel Bearing (Sprung Hub)
XLJ 3. 1/2 JC3 (5″ OD X 3 1/2″ ID X 3/4″ T)
Triumph Pre Unit, Sprung Hub
41-0760A   Crankpin Assembly (Needle Roller Type)
C/w bearing and race
Late BSA B40
60-4100 High Gear Bearing Triumph

Gearbox High Gear Bearing

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5 Speed Models
Triumph T120/T140/T150/T160
BSA Rocket 3
T140 Sprag Bearing 60-7291
  Sprag Bearing to suit electric start Triumph T140
97-4031 Click Here forSteering Head Race Sets

Taper Head Bearing (2 Required)

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OIF Models
BSA B25/B50/A65/A70
Triumph TR5T/T120/T140/T160/T25

We also carry a range of Alpha Crankpin/Big End Assemblies