The small rectangular gasket in the first pic near the bottom of the pic is for the oil pump, it goes between the pump body and the valve body. If you haven't disassembled the oil pump then you won't need it.
For the o-rings:
One goes between the coutershaft bearing support and the engine case, on the right side of the motor behind the transmission cover (5x2.4mm).
Four go under the camshaft support towers (3.7x1.7 mm OR 5.8x1.9 in K2 and later).
Two go between the head and cylinder (11x2.5 mm)
Two go between the cylinder and block (11x2.5 mm).
One goes behind the spark advancer shaft where it plugs into the crank (6x2.3 mm).
One goes on the clutch lifter adjusting bolt (5x.24 mm).
One seals the starter to the case (24.4x3.1 mm).
Three seal the oil pump to the motor (size unlisted).
One seals the oil pump leak stopper cap (15x2.5mm).
Two go on the oil hoses (15x2.5 mm).
One goes on the main oil passage collar between the crankcase halves (8x3 mm).
Three are for the oil passage caps (two under the motor, one on the right side) (19.4x2.
One goes on the left side oil passage plug behind the alternator cover (11x2.5)
One goes on the oil passage plug at the front of the motor (13x2.5).
One goes on the neutral switch (8x3 mm).
One goes on the oil filter bolt (15x2.5).
That adds up to 26 as you have indicated in your pic. But one MIGHT go on the automatic oiler element inside the final shaft (6.4x3 mm) depending on the year of the motor.
Measure what you have and double-check your parts manual. I took these sizes from a K0-K2 parts book.
mystic_1
