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Heplex
3999
+060
61.4mm

with Gudgeon Pin

Villiers
40642
3696/80
59.6mm

D4-5
75.58mm

with Gudgeon Pin and Piston Rings

The gudgeon pin diameter is 16.4mm
Compression height: 30mm
Total height: 81.2mm

New imp. HeplexModel 30. 30DL.
4049
STD
66.9mm

with Gudgeon Pin and Piston Rings

15630
+030
70.65mm

with Gudgeon Pin
1 Piston Ring missing

Piston. Bsa. 65-405 29351 62.9mm

+040
69.8mm

with Gudgeon Pin and Piston Rings

7304
+060
61.46mm

11062
69.85mm
Pat No. 616820

OHV
Model: FH Huntmaster
C.R: 7.25 to 1
STD=69.989mm

with Gudgeon Pin
no Piston Rings

Piston used 16945

16945
+040
67.95mm

with Gudgeon Pin

19916
+040
67.85mm

with Gudgeon Pin

Nüral

with Gudgeon Pin and Piston Rings
Diameter: 69.9mm

64.9mm

with Gudgeon Pin
1 Piston Ring missing

73.3mm

with Gudgeon Pin and Piston Rings

Piston used

53.9mm

no Gudgeon Pin
no Piston Rings

+030
64.55mm

rusty Gudgeon pin
2 Piston Rings missing

BSA A50/A65 Brake Cable 1962-66 - if cable operated

Inner: 57cm
Outer: 34,5cm OD Thread: 6.5 mm - 1/4"  x 26 TPI

BSA Valve Spring Set C11 C12 C11G

Outer Springs
OD: 33,3 mm
ID: 25,3
L: 49 mm
Thread Diam.: 4 mm

Small Springs:
OD: 21.6 mm
ID: 16. 5 mm
L: 37.4 mm
Thread Diameter: 2.5 mmValve Springs

19233A
+040
75.8mm 9:1 Compression
with Gudgeon Pin and Piston Rings Please look at All pictures

Piston Used

3.35mm

Wellworthy
1088
+020
78.15mm

no Gudgeon Pin
1 Piston Ring missing

72.7mm

no Gudgeon Pin
no Piston Rings

New Imperial 250cc Hepolite pistonModel 30. 30DL
4049
68 mm Diameterused or NOS, no guarantee1933-1936Mod. 30, 30TLPlease look at all pictures

+040
15304

61.05mm

with Gudgeon Pin
no Piston Rings

59.65mm

no Gudgeon Pin
no Piston Rings