Please check out the 3rd picture and it lists all the parts in this set
Lister Petter used 3 or 4 different belts (in length) depending on how their engines were configured for a particular application
It would be item number 8 in the Hercules drawing
This would be item number 5 on the Lister Petter drawing
750-41610/050 Piston assembly, used on the LPW and the LPWS Lister Petter series engines. D4800 Please check out the 3rd750 41610 050 Piston assembly, used on the LPW Lister Petter engines. This assembly includes the piston, rings, wrist pin and the cir clips, items 1, 2, 3, and 4. Please study the parts page provided here to ensure proper part. This piston is . 050mm oversize (20 thousands). This will be item number 1, 2, 3, and 4 in the Lister Petter drawing. DO NOT USE THIS PISTON FOR AN LPWS ENGINE, LOOK UP PART NUMBER 750 40094