Search

BSA Piston 85mm B50 Goldstar +40 500cc Unit Construction. BSA DBD Gold Star Pre Unit STD
Diameter of this piston  = 85mm with gudgeon pin, circlips and piston rings

Piston Clearance 0.12mm or 45thou
Compression 10:1
compr. hight: approx. 32.6 mm

Gudgeon Pin Diameter: 19.00mm Please look at all pictures

complete
compr. ratio 9.4:1
Dm. 79 mm
Made by GPM
Middle gudgeon pin to lowest point of piston: 29 mm
Middle gudgeon pin to highest point of piston: 41,5 mm
Gudgeon pin diam. 19 mm

can be used f. Norton
Piston Clearence 0.12mm or 45thou mit Kolbenbolzen, Kolbenringen und Sicherungsringen

BSA Piston 85.5 mm B50 Goldstar +60 500cc Unit Construction. BSA DBD Gold Star Pre Unit +20
85.5mm

Piston Clearance 0.12mm or 45thou
compr. hight: approx. 32.6 mm
Gudgeon Pin: 19mm

BSA C11/C11G/C12 Piston +60 Assembly complete with Gudgeon Pin, Piston Rings and Circlips
250cc
Piston Clearance 0.12mm or 45thou
C11 1939-55
C12 1955-58
can also be used for C10, even if they usually had a flat top measurements see last pict. and techn. data

Price per Pair
incl. Rings, Gudgeon Pins, Circlips
7.25:1
Made in Far East
Piston Clearence 0.12mm or 45thou
STD= 70mm +020= 70.5mm

cpl. with Piston Rings, Circlips and Gudgeon Pin
Price per Pair
Made in Italy
Compr. ratio 8.25:1
+020=70.5mm
Gandini

for Iron and Alloy Head from 1950-62
Piston Clearence 0.12mm or 45thou

BSA DBD Gold Star Pre Unit 500cc Kolben +060. 86. mm. BSA Unit Gold Star 500cc +100
GPM Slipper
86.5 mm
9.5:1
Piston Clearance 0.12mm or 45thou
Can be used on BSA B50 as a +80 Piston with Piston Rings, Circlips and Gudgeon Pin

BSA A65 Piston Pair +040 with Gudgeon Pin, Piston Rings and Circlips

+040 = 76 mm
Kompression 9:1
Price per Pair
BSA A65 1963-72 Lightning

Gandini
Gudgeon Pin Diameter 19 mm - 3/4"
Compr. hight: 37 mm


Piston Clearance 0.12mm or 45thou Price per Pair Please look at all pictures

BSA A50 PHC Piston Pair 65,5 + 075mm = +030 = 66.25 mm Piston Clearance 0.12mm or 45thou Peter Hepworth Made in England Compression ratio 9:1 Please see measurements in techn. data and last picture Complete incl. Gudgeon pin, piston rings and circlips Price per pair

BSA A10 Pistons Standard Size
incl. Rings, Gudgeon Pins, Circlips
7.25:1
Piston Clearence 0.12mm or 45thou
STD= 70mm price per pair Please look at ALL pictures

Compr. ratio 8.25:1
complete
Price per Pair
+080= 72 mm
Gandini
for Iron and Alloy Head 1950-62 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou

Price per Pair
complete with Piston Rings, Gudgeon Pin and Circlips
8.25:1
70 mm
Italian made-Gandini

for Iron and Alloy Head from 1950-62
Piston Clearence 0.12mm or 45thou

BSA B33 Piston +020= 85.5 mm
1946-1953
Hep 11341+20
65-1260 Compr. ration 6.8:1 slight rusty rings
to be used with flywheels
65-1235 and 65-1235
to be used with conrod 66-482
Piston Clearance 0.12mm or 45thou
Compression Height: 31mm
Piston top - Gudgeon pin top: 22 mm
Gudgeon pin diameter: 19 mm
for long conrod with gudgeon pin, circlips and piston rings

1946-1953
STD= 85 mm
Hep No. is 11341Compr. ration 6.8:1
Compression Height: 31mm
Piston top - Gudgeon pin top: 22 mm
Gudgeon pin diameter: 19 mm

to be used with flywheels
65-1235 und 65-1235
to be used with conrod 66-482
Piston Clearence 0.12mm or 45thou
long conrod version
with Piston Rings, Circlips and Gudgeon Pin

8:1 Compression
BSA B40 Piston +60 = 80.5mm
Pin diameter: 19.00 mm
Middle Gudgeon Pin to top of piston: 41.25 mm
Length Gudgeon Pin: 66 mm
Piston Clearence 0.12mm or 45thouwith Piston Rings, Circlips and Gudgeon Pin

+20 = 79.5 mm GPM, cpl.
compr. ratio 9.4:1
Made by GPM
Middle gudgeon pin to lowest point of piston: 29 mm
Middle gudgeon pin to highest point of piston: 41,5 mm
Gudgeon pin diam. 19 mm

can be used f. Norton
Piston Clearance 0.12mm or 45thou with Piston Rings, Gudgeon Pin and Circlips
 

BSA Piston complete
8:1 Compression
+20 = 79, 5 mm
Piston Clearence 0.12mm or 45thou
Gudgeon Pin: 19.00 mm
Compression Height: 40.9mm
incl. gudgeon pin, piston, rings, circlips  

BSA B40 Piston +020 8.75:1 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou

BSA B40 Piston +030 8.75:1 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou  

Ariel Half Time Pinion 25T Please look at all pictures

BSA Piston M20 +040. 83.0mm
complete with circlips and gudgeon pin
82mm +040 (=83mm)
Piston Clearance 0.12mm or 45thou These pistons now come with 4 piston rings.
You can also use them only with 3 piston rings. measurements second picture or techn. data including gudgeon pin, circlips and piston rings

Norton 16H Piston +030 1931-48 500cc SV, 16H, WD   Gudgeon Pin Diameter: 7/8" = 22.22 mm Compression hight 1 3/4" = 44.45 mm Length: 3 5/16" = 84,1375 mm including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou Please look at all pictures

Norton 16H Piston +040. 1931-48. 500cc SV, 16H, WD 80 mm Gudgeon Pin Diameter: 7/8" = 22.22 mm Compression hight 1 3/4" = 44.45 mm Length: 3 5/16" = 84,1375 mm including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou Please look at all pictures

Norton GPM Piston 77mm Pair /STD.
850cc
Piston Clearance 0.12mm or 45thou including gudgeon Pin, piston rings and circlips

Made in England Price per pair

Norton 850 Commando Piston STD Pair with Piston Rings, Circlips and Gudgeon Pin Made in England Please look at all pictures Piston Clearance 0.12mm or 45thou price per pair