Spares for BSA WM20

This is a special page, solely listing spares for BSA WM20. Parts are genuine unless stated reproduction.

Spares for other WW2 Military motorcycles can be found here

Click on an image to view in more detail.

AMAL 276 C/1B WITH “LONG NECK” AMAL FLOAT.

THESE WERE OFTEN USED WITH VOKES AIR FILTER SETS AS GAVE MORE ROOM.

PRE WAR OUTER GEARBOX CASING BSA M SERIES .

PRE WAR GEARBOX OUTER .

NO CRACKS BUT CORROSION PITS IN PLACES . FITS WHOLE RANGE OF PRE WAR M SERIES BIKES .

N.O.S SUMP GUARD-2ND PATTERN. GENUINE. RARE.

THESE SUMP GUARDS ARE NOT YET COPIED WELL ,THESE ARE BSA FITTED 42-45 EXCELLENT CONDITION WITH CLAMP AND NUTS .

N.O.S TAX DISC HOLDER -CLIP FITTING .

A FEW IN R.A.F. PRE AND POST WAR BLUE. 1954 BOXED .

N.O.S MILITARY TAX DISC HOLDER .

THESE ARE IN ORIGINAL POST WAR COLOUR -WITH TONGUE FITTING. FEW ONLY. THISRAF ARIEL SHOWS ONE FITTED.

AMAL N.O.S FLOAT CHAMBER WITH PETROL PIPE FITTING

CORRECT 1M WM20 FLOAT CHAMBER WITH FLOAT , STORAGE WEAR .

REAR LIGHT – PERIOD ,GENUINE

THIS ONE IS ALLOY AND HAS GOOD LENS AND PERSPEX PLATE WINDOW . PART OF INTERNALS ONLY

W.D BATTERY CARRIER -ALL 4 PARTS -READY TO FIT . VGC

THIS SET FOR WM20 . STRAPS HAVE BEEN WELL REPAIRED AT SOME TIME .NOS TOP FIXING WITH ACORN NUTS .

REAR CONVOY LAMP. -WITH GENUINE WW2 COVER.

RE MANUFACTURED ,COPIED FROM ORIGINAL BY SKILLED ENGINEER . EXCELLENT .

POST WAR REAR NUMBERPLATE WITH REPRO LIGHT

useful if wanting to put on for road use . will fit any bike .

ALLOY HEAD M20- NOT WM20 – VERY GOOD CONDITION .

1 XSMALL FIN CHIP . PREFERED BY SOME RIDERS .USED POST WAR TO HELP WITH HEAT PROBLEMS.

BSA WM20 TANK

PETROL TANK -1940-42- 2ND TYPE , WITH CAP.

SOME SURFACE RUST THROUGH DAMP STORAGE AS HAS BEEN RUBBED DOWN. PUMP MOUNTINGS HAVE BEEN REMOVED .

LUCAS MAGNETO IN GOOD WORKING CONDITION .INCLUDING BSA DRIVE SPROCKET.

CORRECT FOR WM20 AND OTHERS . GOOD SPARK .TAKEN OFF RUNNING BIKE .

FRONT MUDGUARD .IN GREAT CONDITION .

GOOD STRAIGHT GUARD WITH THE ODD DENT AS YOU MIGHT EXPECT .

AMAL 276 C/1B. -COMPLETE CARBURETTOR.

GOOD CLEAN LOOKING CARB WITH SOME NEW PARTS FITTED .

BSA WM20 FLAT REAR MUDGUARD ,SUPERB CONDITION .

1942-45 FLAT REAR MUDGUARD .EXCELLENT CONDITION ,WITH ALL BRACKETS .

GOOD ,COMPLETE ,READY TO RE FIT PART A1 CONDITION.

OIL TANK IN BLACK-GOOD CONDITION .

NO DENTS SEEN. -WORKING LID

gearbox mainshaft, sleeved, nut. -holds on clutch

good condition ,nice flats to nut

METAL PETROL PIPE -ORIGINAL FITMENT.

TAKEN FROM RUNNING MACHINE . RARE PART.

CLUTCH ACTUATING CAP WITH ADJUSTER.

ABOVE AVERAGE CONDITION.LITTLE USEAGE.

FRONT MUDGUARD STAY.

GOOD -STRAIGHT

KICKSTARTER PEDAL -M SERIES -CHROMED

BEEN CHROMED SOME YEARS ,STILL GOOD FOR CIVVY BIKE OR BOBBERS

REAR RACK-GENUINE . LOVELY CONDITION .

HARD TO GET PART .MANY COPIES AROUND .

GEARBOX PLATES -PAIR

JUST PLATES-GOOD CONDITION.

BARREL AND PISTON .+40 LITTLE USED . FIN DAMAGE.

AS NEW PISTON . BARREL HAS SEVERAL FINS DAMAGED ON TAPPET/VALVE CHEST SIDE .GOOD FOR RIDER WHO WANTS CHEAPER OPTION .

MODERN REPRO 6 1/2″ DU42 COPY .

COMPLETE .GOOD REFLECTORAND BULB HOLDER .

LARGE DRIVERS SADDLE – LYCETTE COVER-FITS MOST LARGE BIKES

TAKEN OFF RUNNING BSA WM20 ,WILL FIT OTHER MACHINES .UNUSUAL NOSE WHICH IVE SEEN FITTED TO CIVILIAN MACHINES .-E MAIL ME IF YOU RECOGNISE IT ?

CUT OFF PETROL TANK-1942 ONWARDS .

VERY GOOD CONDITION ,GENUINE. GOOD CAP .LOOKS GOOD INSIDE

bottom end -complete- very good runner – 1943

serviced in 1955 and little used . good engine to use .

BSA 1941-1945 PVC COVERED SPEEDO CABLES .

THESE FIT ALL BSA WM20,S . UK MADE . USED LATER WAR 42-45

RUBBER COVERED SPEEDO CABLES FOR BSA 1939-1941

JUST IN SMALL BATCH ,MADE TO MY SPEC.

LARGE SPRUNG SADDLE – MILITARY STYLE .- POSTWAR MADE.

GOOD CONDITION REPRO SADDLE . GOOD COVER .

FRONT WHEEL-COMPLETE WITH SPEEDO DRIVE .

GOOD RIM, RE SPOKED, GOOD HUB . BRAKE PLATE SHOES AND DRUM GOOD .

SMITHS PRE WAR SPEEDOMETER

SMITHS SPEEDOMETER.- PIN DRIVE PRE WAR . FITTED TO BSA AND NORTON .

THIS IS A FULLY RECONDITIONED AND GUARANTEED UNIT BY PHIL WOODS . INCLUDES GENUINE CABLE

TOOLBOX – PRE AND POST WAR M20 RANGE .

GOOD CONDITION -READY TO FIT . HAS HAD EXTRA BRACKET PUT ON .

DRIVERS SADDLE SPRINGS -5″

GOOD PAIR ,USEFUL FOR TALLER RIDERS . UNPLATED W D .

OIL TANK , WITH GOOD LID .

GOOD USEABLE CONDITION .

CHAINSTAY BRIDGE CONNECTING SET +MUDGUARD FIXING

ALL GOOD , SOME CORROSION TO SPACERS.

FRONT ENGINE PLATE COVER . FITTED TO SOME DELUX 1940 MODELS

RARE PART . BELIEVED FITTED TO LATE 39/EARLY 40 W M 20S .

BSA REAR MUDGUARD TAIL PART.

REAR MUDGUARD TAIL -66-6941

EXCELLENT ORIGINAL CONDITION .NO REPAIRS .LITTLE USED.

INNER PRIMARY IN GREAT CONDITION

COMPLETE AND READY TO RE FIT -WITH PLATE ETC .

REAR STAND SPRING -GENUINE

USED ORIGINAL PART

KICKSTART LEVER

SOME PITTING WITH PIN

FRONT ENGINE PLATE SET WITH GENUINE BOLTS

NICE SET INCLUDES VALVE CABLE SPECIAL BOLT

REAR BRAKE PEDAL -COMPLETE AND GOOD .

HAS FRAME BOLT FIXING . BRAKE STOP PLATE AND SPRING

BSA WM20 LIFTING HANDLE

LIFTING HANDLE . 1942 ONWARDS

GOOD CONDITION -READY TO FIT . FITS ANY MODEL.

BSA WM20 FRONT STAY

FRONT MUDGUARD STAY

GOOD CONDITION .

WM20 GEARBOX ,GOOD CONDITION

GEARBOX , CASES CLEANED AND INTERNALS SEEM GOOD .

ONLY TESTED FOR 4 GEARS ON BENCH NOT RUNNING BIKE

DU42 SHELL

LUCAS DU42 WW2 HEADLIGHT SHELL WITH SWITCH PLATE

VERY GOOD CONDITION HAS SPRING FOR CLIP BUT NOT CLIP

SILENCER IN CHROME . AS NEW

STORAGE USE ONLY ,GOOD CONDITION

BSA M20 ENGINE PLATE SET

FRONT ENGINE PLATE WITH CORRECT BOLTS

NICE TO SEE SOME GENUINE BOLTS

BRAKE ROD SUITABLE FOR MANY BIKES

CAME FITTED TO BSA WM20 . NOT CORRECT FOR BUT WORKED.

BSA M20 VALVE LIFTER

EXHAUST VALVE LIFTER ASSEMBLY -COMPLETE

GOOD -USED - VALVE LIFTER -A MUST HAVE PART FOR YOUR BIKE .

BSA PRE WAR M20 KICKSTART IN CHROME

PRE WAR CHROME KICKSTART. BSA PILED ARMS MARKED.

JUST PRE WAR USED ON KM AND MAYBE DELUX MODELS

BSA 1940 COMPLETE WM20 FRAME

FRAME COMPLETE , EARLY 1940 WITH V5C .

THIS FRAME IS FROM CONTRACT C5610. FOR 4000 BIKES . ORIGINAL REAR FRAME

REAR BRAKE PEDAL SHAFT 66-7029

GOOD WITH CORRECT NUT

REAR BRAKE PEDAL WITH BUSH

STRAIGHT ,GOOD CONDITION PEDAL

BSA M20 SEIES EXHAUST PIPE .

EXHAUST PIPE – STORAGE USE ONLY

VERY GOOD CONDITION . NEVER USED .

BSA M20 SILENCER

SILENCER- STORAGE USE ONLY

POST WAR , SOME BLEMISHES BUT NEVER USED M20 SILENCER

15-7160 FRONT MUDGUARD STAY PLATES X 2. 15-7160

SO OFTEN MISSING ,SPREADS THE LOAD AROUND FIXING AND HELPS LOCATE FRONT STAY

bsa wm20 toolbox

ww2 toolbox ready to fit and use .unrestored.

has all fittings . knob is not original and hole has been enlarged to take it . good for users not for restored bikes .

FORKS, COMPLETE SET .VERY GOOD AND STRAIGHT SET. 42-45. 66-5016

CHECKED BY JAKE ROBBINS . MISSING TOP HANDLE BAR CLAMPS ONLY.

BSA WM20 COMPLETE REAR CHAINWHEEL

REAR BRAKE PLATE AND CHAINWHEEL ASSEMBLY . COMPLETE WITH STUB AXLE

THE CHAINWHEEL IS IN GREAT CONDITION , TEETH VERY GOOD .READY TO FIT WITH BRAKE LEVER AND ADJUSTERS AND REAR BOLTS.

FRONT STAY BSA WW2 M20

FRONT STAND 42-45 WITH STRENGTHEND RT PART

GOOD ORIGINAL CONDITION READY TO FIT

BSA RIGID REAR FRAME WW2

REAR FRAME, 1942 -45 WITH FOOTREST LUGS

GOOD CONDITION REPAIRED SILENCER ATTACHMENT

RARE PRE-WAR BSA FRONT HUB _3240

RARE PRE WAR 350cc HUB WITH SPINDLE AND INTERNALS

TURNS ,HAS NO PROVISION FOR LEFT SIDE SPEEDO BOX. CORRECT FOR ROD TYPE BREAKS , thinner shoes and drum than heavyweights .

BSA SPEEDOMETER BRACKET

SPEEDOMETER BRACKET

GOOD CONDITION -READY TO FIT

BSA WM20 ENGINE PLATE SET

ENGINE PLATES WITH BOLTS

READY TO FIT . INCLUDES VALVE LIFTER CABLE SPECIAL BOLT

A M20 GEARBOX PLATE SET

GEARBOX PLATE SET WITH GEARBOX ADJUSTER BOLTS

ALSO GEARBOX/FRAME BOLTS AND SPACERS

BSA WM20 REAR STAND

REAR STAND , U.K REPRO NOT GENUINE- BARE

REPRO STAND HAS HAD REPAIR BY JAKE ROBINS ,NOW VERY GOOD

BSA WB30 GEARBOX , RARE , COMPLETE

PART NUMBER 65-3048 FITTED TO 1940 B29 AND LATER WB40.

rear wheel bsa wm20

REAR WHEEL ,GOOD RIM , SPOKES AND HUB INTERNALS

THE 3 BOLTS HOLDING DRUM HAVE NOT BEEN TIGHT, CAUSING HOLES TO ELONGATE .. USEABLE BUT NOT BEST CONDITION. good bearings etc .

POST WAR NUMBER PLATE

USEFUL FOR THOSE WHO NEED NUMBER PLATES ,TOP BRACKETS HAVE CRACKS BUT EASY REOPAIR

ww2 Lucas du42 headlight shell

HEADLAMP SHELL- LUCAS DU42 WITH CLIP 6 1/2″ WW2

good condition du42 ready to fit

BSA M20 COMPLETE BRAKE PEDAL SET

REAR BRAKE FOOT PEDAL WITH FULCRUM PIN,PEDAL STOP AND SPRING

READY TO FIT COMPLETE ASSEMBLY LESS ROD

bsa wm20 pillion footrests

PILLION FOOTRESTS – PAIR

GOOD CONDITION RESTS

bsa m20 head steady

head steady -66-421

fitted to all wm20 and postwar m series

REAR BRAKE STOP PLATE BSA WM20

REAR BRAKE PEDAL STOP PLATE 66-7033

WITH SPRING . GOOD CONDITION

bsa m20 gearchange lever

GEAR CHANGE FOOT LEVER

in desert colour-good splines

gearbox adjuster fixed part bsa wm20

GEARBOX ADJUSTER ANCHOR

fits on gearbox plates and allows tie rod to adjust

bsa wm20 gearbox adjuster tie rod

GEARBOX ADJUSTER TIE ROD

good condition part.

bsa timing cover WW2

WW2 TIMING COVER .

good condition we have replaced quill with NOS part

BRASS CONVOY LIGHT CONNECTOR ASSEMBLY -NEW

NEW – REAR TAIL LIGHT WITH CONNECTOR ASSEMBLY 4 PARTS AS ORIGINAL

THESE ARE VERY ACCURATELY MADE BRASS COINNECTORS . THE PROPER FITTING FOR CONVOY LIGHT AT REAR

MAG/DYNO DRIVE SPROCKET .

GOOD CONDITION MAGNETO SPROCKET FOR M20

bsa wm20 original handelbars

handelbars -genuine set wm20 .

used and useable ,pretty straight

LUCAS HEADLAMP DU42 PANEL AND WW2 SWITCH

LUCAS DU42 PANEL WITH GOOD 4 POSITION MILITARY SWITCH

WORKING PART ,FITS ALL WW2 MOTORCYCLES WITH SMALL DU42 HEADLIGHT UNIT .

wm20 frame complete with v5c

FRAME COMPLETE WITH V5C.may split .

EARLY FRONT FRAME good straight . later rear 42 onwards .

bsa wm20 clutch centre castellated nut

clutch center nut . genuine , used

useable part , thread takes up well , often stripped !

bsa m20 gear indicator

gearbox, gear position indicator .

often missing part . good used condition

bsa wm20 kickstart pedal

kickstarter pedal .

well used ,pitted , good for unrestored bike

1939 bsa oil tank

early 39/40 oil tank with correct lid

showing original khaki paint as used at dunkirk

m20 rear brake arm

REAR BRAKE ARM

what can I say ! its a brake arm , rear wheel :)

BSA WM20 RUNNING WW2 ENGINE

WM20 20836 ,1940.EARLY,GOOD RUNNING ENGINE .DUNKIRK PERIOD.

PULLED WELL , NO SMOKE ,REMOVED HEAD TO SHOW +20 ,

bsa wm20 steering damper .

STEERING DAMPER ,COMPLETE SET . GOOD CONDITION .

has new hand knob , made by bsa owner . excellent .

genuine ,used ,clutch plates .

some of these are quite useable .

m20 clutch chainwheel used

clutch chainwheel, well used

useable, would get you out of trouble ,1 chipped tooth . correct rollers .

clutch plate center

clutch center ,used

from same working clutch .

clutch plate with good studs

clutch driving plate with 6 good studs

seems to be flat and useable , good studs

clutch center spring

clutch spring , original ,used

this clutch was working so useable .

bsa m20 clutch parts

clutch sleeve with nut , good thread .

used clutch part . useable condition .

w.d convoy lamps post war

PAIR OF W.D REAR CONVOY LAMPS .

nice pair to light up rear number plates.

w.d rear convoy lamp

w.d rear convoy lamp . not ww2

nice w.d tail light. looks good on rear number plates .

m20 drive set

drive set , good spring etc

used good working shock absorber set

bsa magneto cable

magneto cable

good , used , magneto cable

KICK START LEVER .

KICK START LEVER .

GOOD CONDITION LEVER

BSA PILLION SEAT MOUN

BSA PILLION MOUNT PLATE.

HARD TO FIND REAR SEAT MOUNT THAT WAS MAINLY USED WITH FULL PANNIER SETS

WAR ARMY NUMBER PLATE

POST WAR ARMY NUMBER PLATE .with modern tail light

these post war plates were to take the 2 number ,2 letter , 2 number w.d identification .

M20 OIL SUPPLY PIPES . RARE .

N.O.S OIL SUPPLY/RETURN PIPES ,COMPLETE

RARE FIND !! N.O.S . STORED 70+YEARS AND RUBBER FANTASTIC ,NOT PERISHED , ORIGINAL CADNIUM PLATE .

N.O.S front hub felts. L.H

N.O.S front hub felts. L.H

Original grease retaining felts

Smiths military speedometer, pin drive, pre 1940

Smiths military speedometer, pin drive, pre 1940

Suitable for K.M series and de-lux WM20, fully reconditioned by Phil Woods

N.O.S gearbox oil filler plug

N.O.S gearbox oil filler plug

Replace the chewed head!

Lucas magneto suitable for BSA .To restore

Lucas magneto suitable for BSA. To restore

Turns but will need rebuild

Lucas D U 42 headlight unit

Lucas D U 42 headlight unit WITH WW2 1941 DATED CZ27AMP AND T SWITCH.

Refurbished ready to paint. Fits all W.D WW2 Lucas equipped motorcycles . THEY DONT COME BETTER THAN THIS .

NOS cush drive bearing

NOS cush drive bearing

Part of engine shock absorber

Toolbox with knob

Toolbox with knob

Good condition

8" Lucas blackout

8″ Lucas blackout

Often seen in Malta

7/8″ Canvas Throttle & Left Side Covers

7/8″ Canvas Throttle & Left Side Covers

Best new product on market. UK made

Late war engine, running

Late war engine, running

+20 very good condition

M42 Post War Lucas

M42 Post War Lucas

Fitted after WW2 good shell, clip & chrome rim

Rear wheel, complete

Rear wheel, complete

Good used condition

N.O.S engine/crank case bolts

N.O.S engine/crank case bolts

Holds primary case on and wired

Primary case set

Primary case set

Good, brass plug

Kick Starter Quadrant

Kick Starter Quadrant

Good condition

K.M style front number plate

W.M style front number plate

With new guard clamps

Timing Chest Cover

Timing Chest Cover

N.O.S. Plain type. 1941 onwards

Lucas panels with push changer switch

Lucas panels with push changer switch

Used with test switch in housing. Will make nice set

Lucas DU42 headlamp shell

Lucas DU42 headlamp shell

Bare, original anti-gas paint. Rare

Drivers footrest set

Drivers footrest set

Really nice condition set

Reproduction Front Tank Mounting Sets

Reproduction Front Tank Mounting Sets

Used to protect tanks from vibration damage. Sold as pair. Few only

Top Chain Guard

Top Chain Guard

Small hole on side hence the price

NOS Engine Bolts

NOS Engine Bolts

x 5 in pack

WM20 55481 Complete Engine

WM20 55481 Complete Engine

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WM20 Cases

WM20 Cases

Good cases. Some wear on Mag platform. Unstamped

Lucas Dynamo Bands

Lucas Dynamo Bands

40w and 60w

Crank Cases

Crank Cases

Good condition. Well marked

Front Wheel

Front Wheel

No speedo drive

Toolbox, Good Condition

Toolbox, Good Condition

Had repair but good condition

BSA WM20 Good Running Engine

BSA WM20 Good Running Engine

On good +30 bore. Pulls & runs well