BSA B44 Piston complete. +040 = 80 mm. compr. ratio 9.4:1 Made by GPM. Middle gudgeon pin to lowest point of piston: 29 mm. Middle gudgeon pin to highest point of piston: 41,5 mm. Gudgeon pin diam. 19 mm. Useable on JAP. JOS engine or JTOR. Jap engine clearance 0,13mm. can be used f. Norton at +40. Piston Clearance 0.12mm or 45thou.
weight without rings 371 g. weight with rings 400 g.
Brough Superior. SS80. J.A.P. JAP Single Cylinder SV Piston +030 JP. STD= 85.725mm + 0.75 mm = 86.475 mm. including gudgeon Pin, piston rings and circlips. Piston Clearance 0.12mm or 45thou. 500cc= Model K. 85.7mm x 85.
JAP Single Cylinder SV Piston +020 JP. STD= 85.725mm + 0.5 mm = 86.225 mm. including gudgeon Pin, piston rings and circlips. Piston Clearance 0.12mm or 45thou. 500cc= Model K. 85.7mm x 85.
JAP Single Cylinder SV Piston +040 JP. STD= 85.725mm + 1 mm = 86.725 mm. Including gudgeon Pin, piston rings and circlips. Piston Clearance 0.12mm or 45thou. 500cc= Model K. 85.7mm x 85.
JAP Single Cylinder SV Piston STD. JP. STD= 85.725mm. Including gudgeon Pin, piston rings and circlips. Piston Clearance 0.12mm or 45thou. 500cc= Model K. 85.7mm x 85.
JAP Single Cylinder SV Piston +060 JP. STD= 85.725mm. Including gudgeon Pin, piston rings and circlips. Piston Clearance 0.12mm or 45thou. 500cc= Model K. 85.7mm x 85.