For Sale & Wanted

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M24 history
Surviving M24s
M24 Gold Star gallery
Technical information
M24 Spares
For Sale & Wanted
My Other BSA motorcycles
Links to other websites

Please let me know if you have any pre-war M series
bikes or parts for sale or wanted.
Call back regularly as I update the page.

Click here for Email

M24 Parts for sale:  See below for further details

1939 KM24 only...see below 

M24 82mm STD Pistons ...….SOLD OUT

M24 Engine Gaskets 

1938 M24 cylinder barrels - NEW UK made 

M24 82mm cylinder liners   

M24 Rear Brake drums  

Oil tank caps - all 37/38/39 M-series

Gearbox parts - all 37/38/39 M-series  

1939 Rear Number plates made to original pattern   

1939 KM24 Tank Badges 

1938 Oil tank mounting rubber grommets (Set of 4)


 1938 Oil tank mounting grommets - new from original pattern.  Will also fit all other 1937-8 B- & M-series bikes. BSA part Nos 66-8324 or 66-8326 

Set of 4 rubber grommets £12  - Available from Jeff Hunter (the rubber man) at  He does all sorts of rubber parts including footrest rubbers, tank kneegrips, handlebar grips etc

1937-38 oil tank mounting rubber grommets

1939 KM24 Silencer : Made by Armours using original pattern. Excellent quality chrome plating.     £120 plus postage 



New M24 pistons, made by Ross Racing Pistons, Los Angeles, USA  I have a new batch of these forged pistons available in STD 82mm size only. These will also fit M22 and M23 engines, with a small increase in compression ratio.  Now priced at £200 each including postage. 

SOLD OUT May 2020   I will try to get a new batch of these this summer.



Ross Racing piston for M24

BSA M24 HEAD GASKETS    Made to original pattern  

      £30 each plus postage


M24 Cylinder Head Gasket
M24 cylinder head gasket

BSA OIL TANK CAPS: available from Nigel Berry, in Victoria, Australia. They are made with the correct size thread and fit perfectly. M24 type is AU$75, V-Twin type AU$95, both + postage costs.

You can contact Nigel on

BSA M24 oil tank cap AU$75
BSA M24 oil tank cap
BSA V-Twin oil tank cap AU$95





New M24 cylinder liner

M24 CYLINDER LINERS: New British made liner for Standard 82mm bore piston

 £150 including world wide postage


New M24 engine gaskets
New M24 engine gaskets

M24 Gaskets  I have for sale various new gaskets for the M24 engine which have been unavailable for years. These are top quality, made in England from original patterns.
Prices:  Rocker box gaskets - 1 set of 3   £12  
             Cylinder base gasket                       £3.50
             Tappet cover gasket (JM24)        £2.50 
             Rocker box cover gasket             £3.00 
All including UK postage. Postage cost covers any number of gaskets.
Postage to Europe £1.50, Rest of the world £2.50.
Other gaskets, such as timing cover, KM24 tappet cover & the large cork primary case seal are available from UK BSA dealers. 


M24 REAR BRAKE DRUMS    correct ribbed 42T type Part No 66-6107 

UK made - £100 each including UK postage 

New JM24 cylinder barrel
New JM24 cylinder barrel

New 1938 JM24 type CYLINDER BARRELS, with small 2 screw tappet cover.
See photos above
Standard 82mm bore
Excellent quality, cast and machined in Birmingham UK
£1500 including postage



These will fit all 1939 BSA M20/21, M23 and M24, and B-series bikes. BSA Part Number 66-6803. 

UK made in mild steel using an original 1939 pattern, with correct curved top mounting plate.

Will need two 1/4in holes drilled in top mounting to suit your rear mudguard, 3 holes for Lucas stop/tail light, and paint.  

Selling at cost - £150 each plus postage  


New KM24 tank badges

 1939 KM24 Tank badges:  New, excellent quality, well finished and made in Germany in brass or aluminium.

Contact Hubert Runte at for more information and pictures. 

Click here for Email


 Rocker box for 1938 BSA M22 or M23 Empire Star

Complete or shell only 

***WANTED*** Type 14, bottom feed, 7degree float chamber for a pre-war 10TT carb, or complete 10TT36 or 10TT38 carb.  Top price paid for quality item.

Please Phone me or Email for further details

Wanted: For 1939 KM23/24 Gold Star or Silver Star
Petrol Tank instrument panel
Front & Rear wheels/hubs
Girder forks