To compensate for inertial forces from the parts of the crank mechanism, the engines have two balancing shafts 1 and 12 (see fig. 3). Each of them is mounted in the cylinder block on two ball bearings and is driven by a gear train from the pinion at the rear end of the crankshaft. For the correct position of the centers of gravity of the shafts, alignment marks are applied to the gears of the drive (see fig. 25).
In addition to the balancing masses of the shafts, there are still one-sided tides on the flywheel and the generator drive pulley. Since the engines 1111 and 11113 have different masses of pistons, they respectively have different imbalances of the balance shafts, flywheel and generator drive pulley.
Therefore, there are marks on these parts of the 11113 engine to distinguish them. On the flywheel there is an annular groove ∅ 135 mm from the side of attachment to the crankshaft. On the balancing shafts there is an annular groove near the seating surface for the rear bearing. An annular groove ∅ 120 mm is machined on the rear side of the alternator drive pulley.