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JAP Piston Hepolite
Bore: 60mm +030
Outside diameter: 60.7mm
Gudgeon Pin diameter: 14.5mm
Bottom to middle of gudgeon pin: 31.25mm
Middle of gudgeon pin to top edge of the piston: 22.25mm

Villiers Piston +060
63mm +060 (64.5mm)
with Gudgeon Pin
Piston Rings broken

Villiers Piston +040
63mm +040 (64mm)
without Gudgeon Pin a. Piston Rings

Villiers Piston +060
63mm +060 (64.5mm)
with Gudgeon Pin piston rings rusty - bad condition

Villiers Piston Midget Marvel 98cc 1929/32 +060
50mm +060 (51.5mm)

Outside diameter: 51.5mm
Gudgeon Pin diameter: 12.4mm
Middle of Gudgeon Pin to Top of Piston: 24.4mm

Villiers Piston Mark 10D/13D 122ccm Std.
50mmPlease look at all picturesno gudgeon pin, no circlips, no piston rings

BSA B31 350cc Piston Ring Set / Piston Rings +020
STD = 71 mm
+20 = 71,5 mm
Now English rings.

BSA A10 650cc Piston Ring Set / Piston Rings +060
71.5mm

Gandini

BSA Goldstar 500cc Piston Ring Set / Piston Rings +020

Scraper thickness 4 mm
Compression ring thickness: 1,6 mm Depth of rings: 3.7 mm

BSA B50 Piston Ring Set / Piston Rings +060

85.5mm   Compression Ring:  thickness 1,6 mm Oil Ring Thickness: 4 mm

BSA C15 Piston Ring Set / Piston Rings +010 Original Hepolite
Standard 67mm+10=67,25mm
1958-1967
BSA C15,C15T,C15SS,SS80

BSA C15 Piston Ring Set / Piston Rings +020 Original Hepolite
Standard 67mm+20=67,50mm
1958-1967
BSA C15,C15T,C15SS,SS80

BSA C15 Piston Ring Set / Piston Rings +030 Original Hepolite
Standard 67mm+30=67,75mm
1958-1967
BSA C15,C15T,C15SS,SS80

BSA C15 Piston Ring Set / Piston Rings +040 Original Hepolite
Standard 67mm+40=68,00mm
1958-1967
BSA C15,C15T,C15SS,SS80

Height: 1/16"
Width: 2.8mm
Compression Ring:
Height: 1/8"
Width: 2.8mm

BSA C15 Piston Ring Set / Piston Rings +050 Original Hepolite
Standard 67mm+50=68,25mm
1958-1967
BSA C15,C15T,C15SS,SS80

BSA C15 Piston Ring Set / Piston Rings +060 Original Hepolite
Standard 67mm+60=68,50mm
1958-1967
BSA C15,C15T,C15SS,SS80

BSA Piston 500 cc used STD
with gudgeon pin
no piston rings
no circlips
Compr. Hight: 39 mm
Dm: 85,4 mm
no warranty - for restoration

Triumph Piston Std.
2 15/16"
71mm
with piston rings
no circlips, and gudgeon pin

2"- 50.5mm
12.5mm pin
2/s piston
Hepolite used - is probably new
no piston rings
for restoration - no warranty

Piston
2 11/16"-69mm 4th Piston Ring broken

BSA Piston Ring Set / Piston Rings Std.
500cc
Ring: 4mm thick, 3.5mm deep
Upper + Middle Ring: 2.35mm thick

BSA B33 Piston Ring Set / Piston Rings +020
+020=85.5mm
500cc
Oil Ring: 4mm thick, 3.5mm deep
Upper + Middle Ring: 2.35mm thick

BSA B33 Piston Ring Set / Piston Rings +040
+040=86mm
500cc
Oil Ring: 4mm thick, 3.5mm deep
Upper + Middle Ring: 2.35mm thick Made in Taiwan - have proofed to be succesfull

BSA B33/M33 Piston Ring Set / Piston Rings +060
+060=86.5mm
500cc
Oil Ring: 4mm thick, 3.5mm deep
Upper + Middle Ring: 2.35mm thick

BSA A65 Piston Ring Set / Piston Rings STD.-75mm
650ccCompression Ring  thickness 1/16"       Deep 1/8Oil Ring thickness 1/8"     Deep 1/8"