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+020
New piston
70.1mm

with Gudgeon Pin and Piston Rings   measurements last picture

Royal Enfield
H&G
3132
STD
69.6mm

with rusty Gudgeon Pin

Heplex
5726
70mm +40
NOS
Compression Height: 44.3mm
Gudgeon Pin: 18.9mm

with Gudgeon Pin, Piston Rings and Circlips

Heplex
5613
+20
reg no. 537556
61.4mm
nos
OHV
Model: Red Hunter, LG, LH, De luxe, OG, OH
C.R: 6 to 1
STD=61mm

with Gudgeon Pin and Piston Rings

Hepolite
8600
1631
+40

with 2 Piston Rings and Gudgeon PinCompression height 1 7/32"Gudgeon pin 3/4"

JAP
51.3mm

with Gudgeon Pin

BSA Piston NOS
14178
7588-1A
STD
61.5mm1958/63Sunbeam B1.

with Gudgeon Pin
1 Piston Ring missing Please view all pictures

Piston 350cc

3965
10307
+020
70.25mm

357-06/30T
+060

OD: 69.6mm

10306
4181
+020
63.4mm used
gudgeon pin 15.6 mm
Compr. hight: 33 mm
for restoration - no warranty

2218022
63.3mm

Piston NOS

4709
18519
STD
62.8mm

8267
1726-2
+030
63.8mm

OHV
Model: C11, C11G, C12
STD = 63 mm

no Piston Rings, no Gudgeon Pin
for restoration - no warranty

10306
4181
+015
63.3mm used

for restoration - no warranty

68/0909
74.9mm

no Gudgeon Pin
1 Piston Ring missing

Izumi
60.9mm

with Gudgeon Pin
no Piston Rings

Heplex. Royal Enfield. 8899. STD. 69.75mm.
with Piston Rings
no Gudgeon pin

+030
117988
616820
56.8mm

no Gudgeon Pin
Piston Rings missing

17932
62.2mm

no Gudgeon Pin
no Piston Rings

15928
49.9mm

16387
+060
55.25mm

no Gudgeon Pin
no Piston Rings

BSA Piston used
90-1432
61.4mm

no Gudgeon Pin
no Piston Rings

for restoration - no warranty

Ariel
+040
55mm
13410

with Gudgeon Pin

new, old stock

52.4mm

no Piston Rings,
with Gudgeon Pin

Hepolite Piston used
4556
STD
51.9mm

OHV
Model: X34-0, X35-0, X36-0
C.R: 7 to 1
STD = 52 mm

with Gudgeon Pin and Piston Rings

for restoration - no warranty