Triumph Inlet-Valve Guide 650cc Std. Triumph Inlet Valve Guide 350/500/650 cc PRE UNIT + 650 cc UNIT STD size Made in England These can be used fo 3T 1947, with 2 modifications (E1759) 1 mm too long under head The collar needs to be turned a little smaller. Length: 56.4 mmOD 1/2" = 12.7 mm
AJS/Matchless Mod. 18. G80 Piston STD = 82,55 mm Iron Head . NOT PERFECTslight scratches - tried in Cylinder, never fired up.Gudgeon pin diameter 7/8"Compression Ratio 7.2:1including gudgeon Pin, piston rings and circlipsPiston Clearance 0.12mm or 45thouPlease look at all pictures