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.

USED & USEABLE CONDITION.

CRANK CASE SCAVENGE FILTER -BRASS .

USED & RE USEABLE, CLEAN AND FIT .

OIL PUMP DRIVE SPINDLES .

USED - BEST CONDITION .

CRANK DISTANCE SPACER , 66-660

A USED AND RE USABLE ITEM .

CUSH DRIVE DISTANCE PIECE – 65-2528.

ESSENTIAL IF USING EARLY TYPE CUSH DRIVE BEARING .

PAIR OF CAM PINIONS WITH BUSHES.

A USED INLET & EXHAUST SET OF CAMS .

CRANK CASE AIR RELEASE UNIT .

A WORKING UNIT WITH THE FLAP WORKING AND NOT STUCK.

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 – TURNS – NO CRACKS TO BODY .

A USED PUMP THATS QUITE STIFF BUT NEEDS OIL IN IT .

OIL PUMP BRASS FILTERS 66-2623.

GENUINE NOT REPRO.GOOD CONDITION.

HEAD BOLT SET OF 10 BOLTS .

A GOOD USED SET OF BOLTS .

ENGINE CRANKCASE BOLTS -SET OF 3.

GENUINE USED PARTS . SPARES OR REBUILD .

OIL PUMP BOLTS

SPECIAL BOLTS ONLY USED ON OIL PUMP FIXING .

WW2 CYLINDER HEAD THICK FINS ALMOST 100%.

A BETTER THAN USUAL HEAD THAT HAS GOOD FINS ESPECIALLY AROUD PLUG WHERE OFTEN DAMAGED .

MAGNETO DRIVE PINION.

A USED AND RE USABLE ITEM .

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 A N.O.S +20 PISTON – RECENT REBORE . PISTON BARE .

ANOTHER READY FOR USE .SEP OF OVERSIZE BOLTS .

SET OF CRANKCASES – 1940- .

USUAL BIT OF MAG PLATFORM WEAR. NO REPAIRS OR OBVIOUS DAMAGE .

BARREL AND PISTON – REBORED TO FIT THE USED +60 PISTON .

THIS BARREL WAS GOT READY FOR A FUTURE REBUILD SO ALMOST EXTERNALLY PERFECT . REPAIR AND REBORE £100+

COMPLETE EXHAUST LIFTER ASSEMBLY .

GOOD CONDITION READY TO FIT .

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 .

COMPLETE CRANK WITH ROD -TO REBUILD – NICE FLYWHEELS .

WAS RUNNING BUT GETTING NEAR TO REBUILD TIME .

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

MATCHING CASES , WAS RUNNING , WORKSHOP PLATE ON SIDE .

TIMING COVER – LATE WAR – SMALL BSA SCRIPT.

AN UNCLEANED AND UNPOLISHED COVER.

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

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

MAGDYNO IDLER PINION -66-2250.

USED & RE USEABLE, CLEAN AND FIT .

OIL PUMP FILTER – BRASS – 66-2623

USED IN GOOD CONDITION .

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

STILL IN PRESERVATIVE .

N.O.S INNER PRIMARY TO CRANK CASE BOLTS X 3.

LAST BOX OF GENUINE BSA BOLTS WITH HOLES TO WIRE THEM ON .

CRANKCASE SCAVANGE COVER . 66-2611

A GOOD UNDAMAGED COVER.

N.O.S EXHAUST VALVE LIFTER BUSH.

STILL IN PROTECTIVE GREASE .

SET OF 10 M20 HEAD BOLTS .

A USED SET WITH SOME WASHERS .

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 .

BSA ENGINE RIVETS – 27-1239.

UNOPENED BOX - ONE ONLY.

EXHAUST LIFTER SPINDLE – 66-1435.

USED & RE USEABLE.SPLINES LOOK GOOD .

N.O.S CAMS -65-2420- pair.

CLEANED AND IN BEAUTIFUL CONDITION .

N.O.S ENGINE DRIVE SIDE OIL FLINGER PLATE .-24-2113.

GOOD UNUSED AND WELL STORED .- THE ODD BLEMISH .

INLET VALVE 66-235

USEABLE USED VALVE .

N.O.S EXHAUST TAPPETS .

EXCELLENT ,STILL GREASED .

SET OF VALVES -USED -INLET AND EXHAUST.

A USEABLE PAIR OF ORIGINAL VALVES .

ENGINE STRAPS TO HOLD MAG/DYNO.

HAS BOLT AND TRUNNIONS -READY TO CLEAN UP AND RE USE .

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

STILL GOT PRESERVATIVE ON IT . OFTEN BROKEN.

BSA WM20 N.O.S CRANKCASE PLUGS .

REMOVED IF FITTING EARLY OIL PRESSURE INDICATOR.

BSA WM20 OIL PUMP.- 66-2588

GOOD , WORKING AND NO CRACKS TO BODY.

OIL PUMP FIXING BOLTS , 65-2604

GOOD USEABLE ORIGINAL CONDITION .