Description

BSA/Triumph Unit Singles – B25, C25, TR25 Models Circa 1967-71 +60 Piston
As fitted to BSA C25,B25 models (1967-71)9.5-1, BSA Goldstar 250SS, B25SS,Victor 250, B25T models (1971) 10-1, Triumph TR25W (1969-71) 9.5-1, and Triumph T25SS Trail blazer (1971) 10-1.
Supplied complete with Hepolite ring, gudgeon pin and circlips.

Bore Size :Standard
Compression Ratio :9.5-1,10-1
Hepolite number : 16945
Bore size : 2.6378″,67.60mm
Supplied as one piston complete with rings and gudgeon pin and circlips.
Compression ratio: 10:1
Standard bore: 2.64″ (67mm)
Height: 2+9/16″ (64.5mm)
Compression height: 1+7/16″ (36mm)
Gudgeon pin diameter: 11/16″ (17.4mm)
Compression rings: 0.06″ (1.55mm)
Oil scraper ring: 0.12″ (3.14mm)