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.

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 .