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BSA Cylinder Head Bolt Set M20,M21
up to 1949

Made in EnglandSpanner Size 5/16 WWL: 6 pieces 1 5/8"L: 4 pieces 1 1/2"

AJS/Matchless Piston +20
NOS
without Gudgeonpin
without Circlips
without Piston Rings

OHV
Model: 16, 16M, 26, 26SS, 26T, Silver Streak, Single and 2 port
STD=69mmPlease look at all pictures

with Piston Rings, Circlips and Gudgeon Pin

11734
3727
+40
88mm

no Gudgeon Pin
no Piston Rings

Enfield
Dm.: 69.8mm Hole f. gudgeon pin: 19 mm Kompression hight: 41 mm
no Piston Rings
no Gudgeon Pin

65.2mm

with rusty Gudgeon Pin and Piston Rings

67-82
61.9mm

no Piston rings
no gudgeon pin

3615
+020
63.3mm

with Piston Rings
no Gudgeon Pin

Triumph
10500
STD
54.9mm

OHV
Model: De Luxe 3T, Twin
C.R: 6.3 to 1
STD = 55mm

without gudgeon pin

Heplex
10164
2868
+020
63.4mm

Heplex
Reg no. 537556
Enfield
1636-2
STD
69.8mm

no Piston Rings
rusty Gudgeon Pin

53.9mm

new, old stock

rusty Gudgeon Pin and Piston Rings

56.75mm

with Gudgeon Pin
no Piston Rings

13267
+020
STD=66mm
OHV
Model: 20
C.R. 7.8 to 1

with Gudgeon Pin
no Piston Rings

15304
+030
60.5mm

with rusty Piston Rings
no Gudgeon Pin

Bsa C15. 15137
STD
66.85mm

no piston rings, no gudgeon pin

Triumph Piston +040 used
63.6mm

no Piston Rings

Heplex
5897
+040
17115
63.9mm

no Piston Rings
no Gudgeon Pin

very good condition

17952
+020
61.7mm

no Piston Ring
no Gudgeon Pin

52963
54.48mm

no Piston Rings
no Gudgeon Pin

Hepolite
Levis
1397
70mm
+030

with Gudgeon Pin

Royal Enfield.Heplex. 8899. STD. 69.9mm.

no Piston Rings, no Gudgeon Pin

BSA Piston NOS
13530
+040
80.5mm

with Gudgeon Pin Please view all pictures

Heplex
8645
STD
1636-2
69.7mm

Norton Piston used
68.48mm

OHV
Model 77, 99, Dominator Twin
C.R: 7.4 to 1
STD = 67.996 mm

no Piston Rings
no Gudgeon Pin