BSA WM20 Used Engine Spares

This is a special page, solely listing spares for BSA WM20 Engine parts.

Parts are genuine unless stated reproduction.

Spares for other WW2 Military motorcycles can be found here.

WELL ALL – THATS IT FROM ME :).

NO MORE LISTINGS . SITE OPEN UNTIL 30TH AUGUST THEN ONCE ALL ORDERS CLEARED IT WILL BE CLOSED .

WW2 CRANK CASE ENGINE BREATHER PIPE – FULL LENGTH !

ORIGINAL SPEC AND FINISH -DISCOUNTED PRICE £30

PAIR OF FLYWHEELS – USEABLE .

DISCOUNTED TO £20- FLAT PACK SO EASIER TO PACK AND SEND .

TIMING CHEST SCREWS & BOLTS -USEFUL.

USEFUL ENGINE SPARES DISCOUNTED TO £15

JOB LOT OF MAGDYNO IDLER PINIONS -66-2250.

GOOD USED & REUSEABLE PINIONS -DISCOUNTED TO £ 15 THE LOT .

TIMING GEAR PLATES WITH BUSH- 66-2008.

JOB LOT DISCOUNTED PRICE £10

GENUINE N.O.S HEPOLITE PISTON WITH RINGS +20 . DISCOUNTED TO £50.

A GOOD USED GENUINE PART WITH MINOR STORAGE MARKS -WONT AFFECT ITS FUNCTION. .

N.O.S OIL TELL TAIL FROM 1939 ! WITH PART OF FITTINGS .

MY ACTUAL FAVOURITE PART ! KEPT BACK TO LAST :).

WW2 CUSH DRIVE BEARING .

THIS IS THE CORRECT WW2 TYPE THAT USES A SMALL SPACING RING SEPARATELY.

ENGINE PARTS .

DISCOUNTED TO £10

GENUINE BSA REBUILT CRANKSHAFT FROM 1955 – ZERO MILAGE SO AS NEW .

BSA FITTED BIG END -AN A1++ CRANK THAT I KEPT FOR MYSELF.- DISCOUNTED TO £500 ( THE COST OF A PATERN BIG END FITTED ! )

MAGNETO DRIVE PINION WITH NUT .

USED & REUSEABLE GENUINE PARTS. DISCOUNTED TO.

VALVE CHEST COVER 42-45.

USED & REUSEABLE GENUINE PART .

SET OF VALVE COLLET’S- 4.

USED AND ALWAYS GOOD TO HAVE SPARE ONES !

EXHAUST VALVE LIFTER ASSEMBLY – 5 PIECES .

USED -MISSING THE SMALL SPRING .

EXHAUST VALVE LIFTER LEVER – 66-1431.

USED & RE USEABLE, CLEAN AND FIT . A1 CONDITION .

ENGINE DE COMPRESSOR -COMPLETE ASSEMBLY OF THE 6 PARTS .

A1 CONDITION VALVE LIFTER ASSEMBLY .

BSA WM20 ENGINE NUMBER -WM20 23815. A 1940 NUMBER . COMPLETE AND RUNNING ENGINE .

GOOD FOR ITS AGE AS +20 AND THE THICK FINS WILL SEE MOST OF YOU OUT !

CRANKCASE PLUG SCREW -27-181.

FITTED ON WW2 M20 - BLANKS OFF OIL TAKE OF TO TELLTALE OF 39/40 BIKES .

LATE WAR TIMING COVER WITH GOOD QUILL.

IN CHOCOLATE BROWN-A GOOD CLEAN COVER.

VALVE SPRING COLLARS WITH SPLIT COLLARS.-66-221 & 66-222.

USED & USEABLE CONDITION- A1 CONDITION .

BARREL & PISTON – STANDARD ! – LITTLE USED WITH ALL FINS INTACT .

A LOVELY BARREL & RARE TO GET ONE IN THIS EXTERNAL CONDITION .

SET OF ENGINE STRAPS -COMPLETE FOR SECURING MAG DYNO.

A GOOD USEABLE SET MADE WHEN THINGS WERE PROPERLY MADE !

SPECIAL OIL PUMP FIXING BOLTS – 65-2604.

USED & REUSEABLE GENUINE PARTS .

OIL PUMP DRIVE SPINDLE – GENUINE BSA FROM WW2 .

IN A1 CONDITION -VERY LITTLE WEAR .

PAIR OF CAM PINIONS WITH BUSHES.

A STUNNING PAIR OF CAMS -A1 CONDITION - not discounted .

PAIR OF CAM PINION SPINDLES .

USED - IN GOOD CONDITION .

GEAR PLATE AND CAM PLATE BOLTS. -SET.

ALL GOOD WITH CORRECT WASHERS .

TIMING GEAR PLATE WITH BUSH – 66-2008.

AS NEW ! GIVES YOU AN IDEA OF HOW GOOD THESE ENGINE PARTS ARE .

PAIR OF VALVE SPRINGS .31-106.

USED & REUSEABLE GENUINE PARTS .

ENGINE SHAFT TIMING PINION. 65-692.

A1 CONDITION -USED PART THATS NOT BEEN DAMAGED .

MAIN BEARINGS SET – GENUINE FROM 1944.

A GOOD USEABLE SET MADE WHEN THINGS WERE PROPERLY MADE !

A BARREL WITH NO MAJOR DAMAGE ON +40.- WILL NEED A REBORE -SEE DESCRIPTION .

ALTHOUGH ON +40 WITH A GOOD BORE UNFORTUNATELY IT HAS DONE MANY MILES WITH A BENT CONROD ! ITS NOW WORN HEAVILY IN ONE PLACE AND WILL NEED A + 60 OR THIS +80 OR SO PISTON FITTED .

NOTICE – PLEASE READ -ALL PROCEEDS TO CHARITY AS CLOSING DOWN -SEE HOMEPAGE – TO GET DISCOUNTS SPEND OVER £100 .

DUE TO THE LARGE AMOUNT OF ORDERS , MANY THAT YOU DO NOT SEE, I AM NOW DOWN TO THE VERY LAST BSA AND MY OWN PERSONAL PARTS , ALL OF THESE , AS YOU MIGHT EXPECT ARE WW2 , GENUINE & A FEW VERY RARE PARTS . FROM 1ST MAY  SOME RARE  PARTS WILL SAY  NOT DISCOUNTED  . IF NOT MARKED THEN STOCK WILL STILL CARRY A DISCOUNT OF A VARIABLE RATE OF 10-20%.

WW2 TIMING COVER. 66-1918.

A GOOD USED COVER WHICH HAS GOOD QUILL & NON RETURN OF OIL PARTS .

N.O.S VALVE CHEST SPRING COVER.-66-244.

2 ONLY - THE FLAT PLATE TYPE FITTED FROM 41- 45.

N.O.S EXHAUST TAPPET HEADS -66- 1498.

SUPERB CONDITION AND OFTEN DAMAGED DUE YO INCORRECT USE OF VALVE LIFTER .

N.O.S -OIL FLINGER PLATES – 66-2250.

DISCOUNTED PRICE £2 each

SET OF 10 HEADBOLTS .

A USED SET SO SOME RUST ON THEM .

CRANK CASE AIR RELEASE UNIT -COMPLETE,

A WORKING UNIT WITH THE FLAP WORKING AND NOT STUCK.

VALVE SPRING COLLARS -PAIR.

USED AND RE USEABLE PARTS .

ENGINE SHAFT TIMING PINION 65-692.

A GOOD USED PART A1 CONDITION.

USED & USEABLE CONDITION.

CRANK CASE SCAVENGE FILTER -BRASS .

USED & RE USEABLE, CLEAN AND FIT .

OIL PUMP DRIVE SPINDLES .

USED - BEST CONDITION .

MAGDYNO HOLDING STRAP WITH BOLT .

USED & USEABLE CONDITION.

EXHAUST TAPPET HEAD .

USED & RE USEABLE, CLEAN AND FIT .

CRANK SHAFT DISTANCE COLLAR – 66-660.

USED & RE USEABLE . NEED A GOOD CLEAN.

BARREL WITH GOOD FINS . WITH BARE +60 PISTON .

THIS BARREL WAS GOT READY FOR A FUTURE REBUILD SO ALMOST EXTERNALLY PERFECT . THE EXHAUST VALVE INSERT WILL NEED CUTTING BEFORE USE AS ITS NOT BEEN FITTED SQUARE !

EXHAUST TAPPET HEAD. 66-1498.

GOOD CONDITION -HAS SEEN LITTLE USE .

ENGINE CRANKCASE BOLTS X 3.

GENUINE 3 BOLTS FROM BSA .

COMPLETE EXHAUST LIFTER ASSEMBLY.

CORRECT ARM , SOME WEAR ON SPINDLE THROUGH USEAGE .

WM20 STAMPED CRANKCASES – A PROPER PAIR – POST WAR DATED 1955.

WOULD HAVE BEEN USED BY A WORKSHOP AS REPLACEMENT ENGINE .A GOOD PAIR

BSA M21 HEAD BOLTS.-8.

LONGER THAN M20.

CRANKCASE OIL PIPE ADAPTORS.

PAIR OF USED ENGINE ADAPTORS.GOOD CONDITION.

PAIR OF VALVE SPRING COLLARS – 66-221.

A GOOD CONDITION ORIGINAL PAIR.

MAGDYNO IDLER PINION-66-2250

A GOOD USED PART .

N.O.S EXHAUST TAPPET. 66-1498.

STILL GOT PRESERVATIVE ON IT . OFTEN BROKEN.