singles - engine parts

Condition: used
Journal size 36.3 mm = 0.10 inch U.S.
Bearings available
Will fit unit 250 motors 1967-
OPN 40-1024

Condition: Used
1968 -
Casting no: PBM40930
Made in England

Condition: Used but with new filter-element
1971 -
(Universial fittings for all British Bikes)

Condition: NOS
1970-

Condition: Used
1967 -
Casting no: 70-9392
Will fit Triumph TR25W Trophy 250 singles 1968-
​Made in England

condition: NOS
4-plates driving type

condition: NOS

Condition: NOS
1967 - 1972
oversize 68.6 m
​Made in Italy

condition: NOS

Condition: Used, but in very good condition
Barrel honed to correct clearance
1968 - 1972
Fits: B25 types
​Made in England

Condition: New stock
1967 -
Made in England

Condition: NOS
1967-
69 mm dia, bored & honed to correct clearancePriced and sold per complete set

Condition: Used but very good
Bearings still fitted
1968-1972

Condition: NOS
1971 and onwards
Made in England

Condition: Used
M33 pre-unit singles
1949-1960
Lenght 238 mm

Condition: Used
1960 - 1970
Casting no:40-0245
​Made in England

Condition: Used
1960 - 1970

Condition: Used but in good condition
bored & honed to correct clearance
Supplied complete with new 0.60 piston
1960-1968

Condition: Used, but no broken fins
Supplied complete with new 0.40"o.s. piston set
bored and honed to right clearance
1960 - 1968

Condition: NOS
B40 - 350 Star - SS90
with needle bearing
1960 - 1964

Condition: NOS
1960 - 1964
Genuine BSA part

Condition: Used barrel with new o.s. piston complete
0.20" = 0.5mm
1962
Bored and honed to right clearance

Condition: Used
In very good condition, crankshaft bearing still in place
Type with ball & roller bearings
1965-

condition: NOS
5-plates driving type

Condition: NOS
1937 - 1957
Made in England by Tranco Valves Priced and sold per pair.

Condition: New

Condition: Used, in very good condition
Complete less dynamo distributor-cover and carburetor
Engine no: BC10 316
STD size piston (63 mm)
engine is turning around

Condition: NOS
1958 - 1963
Genuine BSA part

Condition: Used but in very good condition
Fits 250 CC C15 engine
1958/
Cylinder bore 67 mm

Condition: NOS
Fit: BSA
C10 - C11 1946 - 1953
B31 - B32 1946 - 1957
M20 - B34 1948 -
M33 - B33 1957 OPN 67-3242
A7 - A10 swing-arm type 1948 - 1957
Made in the USA Priced and sold per set

NOS
Made in Czech Republic
Will fit Jawa Speedway bike + BSA Gold Star
c/w CEV ignition coil
OPN: 443.211-241.31

Condition: Used
Triumph Trophy 250 (TR25W) 1968,
Or BSA B25T 1968
Standard bore 67,04 mm

Comdition: Used
FB 994
Triumph T25 & BSA B25 singles 1971 OIF

Condition: Used but very good
Will also fit BSA B25 - B50 type engines

Condition: NOS
Complete with HT lead & clamp
6 volt
1958 - 1965