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Ariel SV 600cc. 550 cc JP Piston +020. 86.9 mm 1931-1932 550 cc SV. SB21, SB32, Sloper 1932-1932 550 cc SV. VB, VB33 Vertical Engine 1933-1935 550 cc SV. VA, VA4 1936-1958 600 cc SV. VB Gudgeon Pin diameter 13/16“ = 20.5 mm Measurements - please see last picture or techn. Data Made in Australia incl. Piston Rings, Gudgeon Pin and Circlips Piston Clearence 0.12mm or 45thou

Triumph 6T pistons +20 650cc
Pre Unit
f. Cast Iron Head
7:1
71mm +20=71.5mm
for Cast Iron Head - please do not fit to alloy head
complete with gudgeon pin, piston rings and circlips

Piston Clearance 0.12mm or 45thou measurements see techn. data Price per pair

Triumph Piston T140V/TR7V 750cc +020
76mm+020 = 76.5mm
8.6:1
Price per Pair

Piston Clearance 0.12mm or 45thou including gudgeon Pin, piston rings and circlips

BSA/Triumph Piston B25 & TR25 +040

Bore: 67mm +040 (=68mm) including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou

comp. ratio 9.25:1

Ariel SV 600ccm GPM Piston +030
87.2mm

incl. Pistonrings, Gudgeon Pin and Circlips
Piston Clearence 0.12mm or 45thou

JAP Twin SV Piston Brough Superior/Zenith/Coventry Eagle +040 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou JP / Price per Pair
STD= 85.725mm
1924-39 Piston
1000cc K Type 1923-29= 85.7 x85
1150cc LT, LTZ,L Type = 85.7 x95

500cc= Model K
85.7mm x 85

550cc = Model L
85.7mm x 95

600cc= Model U
85.7mm x 104

Gudgeon Pin: 13/16" - 20.7mm
Compression Height: 1 5/8" - 41.3mm
Piston Length: 3 1/4" - 82.5mm

JAP Twin SV Piston Brough Superior/Zenith/Coventry Eagle +060 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou JP / Price per pair
STD= 85.725mm
1924-39 Piston
1000cc K Type 1923-29= 85.7 x85
1150cc LT, LTZ,L Type = 85.7 x95

500cc= Model K
85.7mm x 85

550cc = Model L
85.7mm x 95

600cc= Model U
85.7mm x 104

Gudgeon Pin: 13/16" - 20.7mm
Compression Height: 1 5/8" - 41.3mm
Piston Length: 3 1/4" - 82.5mm

JAP Twin SV Piston Brough Superior/Zenith/Coventry Eagle +030 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou JP / Price per Pair
STD= 85.725mm
1924-39 Piston
1000cc K Type 1923-29= 85.7 x85
1150cc LT, LTZ,L Type = 85.7 x95

500cc= Model K
85.7mm x 85

550cc = Model L
85.7mm x 95

600cc= Model U
85.7mm x 104

Gudgeon Pin: 13/16" - 20.7mm
Compression Height: 1 5/8" - 41.3mm
Piston Length: 3 1/4" - 82.5mm

Bsa Sloper Piston. 500cc. 1925-31 +020

Measurements see last pict. gudgeon pin 16 mm

S25,S26,S27,S28,S29,S30-
9,S31-7 493cc ,SV 1925-31 Please look at all pictures including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou

JAP Twin Piston STD. / Pair including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou 1000cc OHV
Model KTO
KTOR
STD = 85.7 mm x 85 mm Bore and Stroke
Gudgeon Pin D: 20.5mm
Compression Height: 32.45mm
JP / Price per pair

JAP Twin Piston +040 / Pair with Gudgeon Pin, Piston Rings and Circlips
1000cc OHV
Model KTO
KTOR
STD = 85.7 mm x 85 mm Bore and Stroke +040
Gudgeon Pin: 13/16=20,6mm
Compression Height: 32.45mm Piston Clearance 0.12mm or 45thou JP

JAP Single Cylinder Piston STD. including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou 500cc OHV
Model
KO
KOR
STD = 85.7 mm x 85 mm Bore and Stroke
Gudgeon Pin: 13/16=20,6mm
JP

BSA Piston +040 Pair. 1950-59. also Ariel 1952- 8:1 Compression including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou Price per pair  

BSA A75. Triumph T150 Piston +060 Set Cast AlloyCompression ratio 9:1including gudgeon Pin, piston rings and circlipsPiston Clearance 0.12mm or 45thouset of 3Please look at ALL pictures

BSA Piston Std. 500cc B50/Goldstar
84mm
Compression: 10:1
Compression height: approx. 32.8 mmWeight 459 g

Gudgeon Pin Diameter: 19mmincluding gudgeon Pin, piston rings and circlipsPiston Clearance 0.12mm or 45thou

BSA Piston +40= 86 mm  OHV 1947-52 . B33, B34, B34 Gold Star 8.5:1 JP Long Conrod mod. only. Rod number o/e 66-483 85mm std Please look at all pictures including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou  

BSA Piston +20  OHV 1947-52 85,50mm. 1947-1952. +020 = 85.5 mm B33, B34, B34 Gold Star 8.5:1 Long stroke  Models only. Conrod number o/e 66-483 85mm std  JP including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou  

BSA Piston +60 OHV 1947-52 86,5mm. 1947-1952. B33, B34, B34 Gold Star 8.5:1 JP Long Rod Models only. Rod number o/e 66-483 85mm std including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou

JAP Twin Piston +020 / Pair including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou 1000cc OHV
Model KTO
KTOR
STD = 85.7 mm x 85 mm Bore and Stroke +020
Gudgeon Pin: 13/16=20,6mm
Compression Height: 32.45mm
JP

BSA Piston STD OHV 1947-52 85mm. 1947-1952. = 85mm B33, B34, B34 Gold Star 8.5:1 Long stroke  Models only. 
Conrod number o/e 66-483 85mm std  JP including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou 

Norton ES2 Piston +040
complete
GPM/Gandini
STD. 79mm +040 (80.0mm)
gudgeon pin 22.25 mm
Make: Gandini Italy
Compression Height: 35.1mm

Piston Clearance 0.12mm or 45thou including gudgeon Pin, piston rings and circlips

Ariel 550cc Piston +030  87,15 mm
JP Piston including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou  

Triumph T20 Piston Std 9-1 C.P.172 E3958.E3959.E3960.E3961 E1750.E1767 including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou

BSA GPM A65 Piston Pair STD 7.5-1
Compression High: 37mm
Gudgeon Pin DM: 19mm including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou Price per pair  

BSA A65 Piston +020 Pair
7.5:1
Gandini
Gudgeon Pin Diameter 19 mm - 3/4"
Compr. hight 37 mm Lightning

020 = 75.5 mm including gudgeon Pin, piston rings and circlips Piston Clearance 0.12mm or 45thou Price per Pair