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AJS/Matchless Piston 350cc +020 Gudgeon Pin: 22 mm - 7/8"
for Alloy Cylinder Head
1948-62
7,5:1
OD  69.5 mm Total hight 85 mm Piston clearance 0,12 mm 347 cc OHV 16M  1948-55 347 cc OHV 16MS 1956-58 Please look at all pictures

BSA Piston +20 500cc B50/Goldstar
84.5mm
Piston Clearance 0.12mm or 45thou
Compression 10:1
compr. hight: approx. 32.6 mm

Gudgeon Pin Diameter: 19mm

BSA/Triumph Piston B25 & TR25 Std.

Bore: 67mm
Piston Clearance 0.12mm or 45thou

comp. ratio 9.25:1 with rings, circlips and gudgeon pin

Ariel 350 cc OHV 1933-1955 O.H.V. Std. = 72 mm
NG. NH. WNG. Red Hunter compr. ratio 6.2:1
incl. piston rings, gudgeon pin, circlips.
Piston Clearance 0.12 mmPlease look at all pictures

BSA A50 Piston Ring Set / Piston Rings +020
500cc
STD = 65.5 mm
+020= 66 mm   Thickness 4 x 1,6 mm and  2 x 3,3 mm

not Made in England

BSA A50 Piston Ring Set / Piston Rings +040
STD = 65.5 mm
+040= 66,5 mm

not Made in Englandcompression rings (top and middle): width 1/16"   Depth 3/32"Oil Ring: Width 1/8" Depth 3/32"  

BSA A50 Piston Ring Set / Piston Rings +060

not Made in England

STD = 65.5 mm
+046= 67 mm

Villiers Piston +060
1931-1938
346 c.c. Long Stroke, XIVB. YZ
Automatic Lubrication
(G. Pin Parallel to Deflector)
+60 = 71,5 mm
With Piston rings,without Gudgeon Pin and without Circlips
used

BSA A10 650cc Piston Ring Set / Piston Rings 1950-63

STD= 70.00mm
Gandini

BSA A10 650cc Piston Ring Set / Piston Rings 1950-63 /+40
STD= 70mm +40= 71mm

Gandini

BSA A10 650cc Piston Ring Set / Piston Rings 1950-63 /+20
STD= 70mm +20= 70.5mm
Compression Rings Width: 2.85mm, Thickness: 1.65mm
Oil Ring Width: 2.85mm, Thickness: 3.15mm

Gandini

BSA A65 Piston Ring Set / Piston Rings +60
650ccCompression Ring  thickness 1/16"       Deep 1/8Oil Ring thickness 1/8"     Deep 1/8"

BSA A65 650cc Piston Ring Set / Piston Rings +040
Std. 75mm
+040= +1mmCompression Ring  thickness 1/16"       Deep 1/8Oil Ring thickness 1/8"     Deep 1/8"

BSA A7 Piston Ring Set / Piston Rings 1950-62 /STD.
Diameter 66mm
Compression Rings 1/16"
Oil Ring. Thickness 1/8" Gandini GPM

BSA B31 Piston Ring Set / Piston Rings +010
STD = 71 mm

Compresion ring 3/32" 2.4mm thick
deep 2.7mm

oil ring 1/8" thick deep 2.7mm

BSA B34 500cc Gold Star Piston Ring Set / Piston Rings +60

Scraper thickness 4 mm
Compression ring: 1,6 mm

BSA B34 500cc Gold Star Piston Ring Set / Piston Rings+40
= 86 mm

Scraper thickness 4 mm
Compression ring: 1,6 mm

BSA Piston M20 +020 NOS. 1/2mm os
no piston rings
no gudgeon pin
no circlips
new, old stock original BSA

Triumph Piston Ring Set / Piston Rings 500cc +040
70mm
Triumph Kolbenring Set 5TA,T100T,T100A, T100SS,T100R,T100C +040
1957-73 STD=69.00 +040= 70.00mm

R13570.70-3829.70-3831.70-4135.
70-4136.CP175.E3829.E3831.E4135.
E4136

BSA 125cc D1 Piston Ring Set / Piston Rings -20

BSA 125cc D1 Piston Ring Set / Piston Rings -40

BSA 125cc D1 Piston Ring Set / Piston Rings  -60

Piston Ring Set / Piston Rings BSA Bantam 175cc D5/D7 -020
Std =61.5 mm
+020 = 62 mm

Thickness = 3/32" = 3.3 mm
Depth = 2 mm

Piston Ring Set / Piston Rings BSA Bantam 175cc D5/D7 -060

Std =61.5 mm
+060 = 63 mm
Thickness = 3/32" = 3.3 mm
Depth = 2 mm

Piston Ring Set / Piston Rings BSA 175cc D10/D14 STD.
STD= 60mm