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.

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 .

COMPLETE INLET TAPPET SET WITH ITS ORIGINAL GUIDE .

LOVELY CONDITION - RARELY FOUND IN THIS CONDITION.

COMPLETE EXHAUST TAPPET SET WITH ITS ORIGINAL GUIDE.

VERY LOW MILAGE -MINIMAL WEAR -AS NEW .

MAIN BEARINGS SET – GENUINE FROM 1944.

A GOOD USEABLE SET MADE WHEN THINGS WERE PROPERLY MADE !

MAGNETO DRIVE .

USED & RE USEABLE, CLEAN AND FIT .

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%.

N.O.S TAPPET GUIDES 66-1494.

AS NEW GOOD FOR INLET OR EXHAUST.

BARREL AND PISTON – + 20. GOOD THICK FINS .

SMALL AREA OF FIN DAMAGE NEAR EXHAUST STUB -SEE PICTURES .

COMPLETE FLYWHEEL & ROD ASSEMBLIES .- SOME ARE STEEL SETS 66-635 – 4 LEFT.

ALL GOOD BUT WILL NEED REBUILDS IF GOING TO USE FOR USEAGE AND NOT DISPLAY !

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 CRANKCASE BEARING SPRING RING -65-2240.

SOME RUST BUT THEY CLEAN UP AND STILL GOOD SPRING.

SET OF 10 HEADBOLTS .

A USED SET SO SOME RUST ON THEM .

EXHAUST LIFTER LEVER- 66-1431.

A GOOD USED LEVER .

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.

CRANKCASE MAGNETO SHIMS .005 THOU BRASS – 66- 2347.

THESE ARE N.O.S BUT HAVE TARNISHED ., if you have whining then youy need to shim the mag base .

USED & USEABLE CONDITION.

CRANK CASE SCAVENGE FILTER -BRASS .

USED & RE USEABLE, CLEAN AND FIT .

OIL PUMP DRIVE SPINDLES .

USED - BEST CONDITION .

PAIR OF CAM PINIONS WITH BUSHES.

A USED INLET & EXHAUST SET OF CAMS .

TIMING CHEST PLATE WITH BEARING.

A GOOD USED & REUSEABLE PART.

ALMOST NEW -PAIR OF ALPHA VALVES .

A GOOD STRAIGHT STEM , GOOD TO USE.

OIL FLINGER PLATE – 66-2250.

USED & NEED A GOOD CLEAN TO RE-USE .

MAGDYNO HOLDING STRAP WITH BOLT .

USED & USEABLE CONDITION.

EXHAUST TAPPET HEAD .

USED & RE USEABLE, CLEAN AND FIT .

CRANKCASE SCAVENGE PLATE WITH BRASS FILTER .

USED , NEEDS A GOOD CLEAN UP, UNTOUCHED .

OIL PUMP BRASS FILTERS 66-2623.

GENUINE NOT REPRO.GOOD CONDITION.

PISTON +20 WITH N.O.S RINGS -HEPOLITE .

A QUALITY PISTON THAT I THINK WAS N.O.S BUT DAMP STORED HENCE MARKS .

TIMING CHEST PLATRE WITH BEARING – 65-2008.

A GOOD PLATE THATS HAD OIL REMOVED HENCE LIGHT RUST .

CRANK SHAFT DISTANCE COLLAR – 66-660.

USED & RE USEABLE . NEED A GOOD CLEAN.

TIMING CHEST PLATE WITH BEARING -65-2008.

A GOOD CONDITION USED PART .

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 .

STANDARD PISTON WITH RINGS , PIN & CIRCLIPS .

A USED PISTON THATS USEABLE .

WW2 BOTTOM END WITH CRANKSHAFT, CON ROD & TIMING SIDE PARTS .

MATCHING CASES , WAS RUNNING , WORKSHOP PLATE ON SIDE .

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

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

OIL PUMP FILTER – BRASS – 66-2623

USED IN GOOD CONDITION .

N.O.S EXHAUST LIFTER BUSH. 66- 1434.

STILL IN PRESERVATIVE .

CRANKCASE SCAVANGE COVER . 66-2611

A GOOD UNDAMAGED COVER.

N.O.S EXHAUST VALVE LIFTER BUSH.

STILL IN PROTECTIVE GREASE .

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 CAMS -65-2420- pair.

CLEANED AND IN BEAUTIFUL CONDITION .

INLET VALVE 66-235

USEABLE USED VALVE .

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

STILL GOT PRESERVATIVE ON IT . OFTEN BROKEN.

OIL PUMP FIXING BOLTS , 65-2604

GOOD USEABLE ORIGINAL CONDITION .