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BSA/Triumph Piston B25 & TR25 +020
BSA/Triumph Piston B25 & TR25 +020

BSA/Triumph Piston B25 & TR25 +020

BOA86

BSA/Triumph Piston B25 & TR25 +020

Bore: 67mm +020 (=67.5mm)
Piston Clearance 0.12mm or 45thou
comp. ratio 9.25:1

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