complete
+60 = 80.5 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
can be used f. Norton
Piston Clearance 0.12mm or 45thou
with piston rings, circlips and gudgeon pin
Triumph Belt Drive Kit
Pre Unit 500cc, 650 cc
1954-1963 swinging arm
80t x 25mm
original steel clutch plates can be used CPL14)
ID cluch basket 6 1/16 " + tolerancee approx. 154.5 mm