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Triumph T120 Big Bore Kit 10 Stud  - only to be used with 10 stud head Tr6V or T140V head.convert your pre unit 650 cc to 750 cc 10-studyou need with this cylinder a 750 cc 10-stud headThis cylinder is designed to fit your Pre Unit triumph crankcasesThis cylinder is NOT designed to convert your 500 cc machine to 750 ccThis clyinder is NOT designed to be used on 650 or 750 Unit Triumphs - PRE UNIT ONLYThe OD of the liner is 80,2 mmTo fit 3/8” studs + 3/8 studs with spigotThe stud holes have 2 sizes for standard and spigotDepth of liner in crankcase 29,6 mmCylinder base 16,2 mmTotal cylinder hight incl. liners 138,6 mmTotal hight less liner hight 109 mmCylinder bore 76 mm - STDPistons are 9.1 to 1Please look at all pictures

Big Bore Kit Triumph. New.  650cc - 750cc
9 stud, 76 mm bore = 750 cc
650 cc 9stud head can be used. Compr. 8,6:1
barrel, pistons, head gasket PS214
Cylinder and rings made in England Please look at all pictures