1. Engine Components
Chapter #6

2. Engine Block

3. Engine Block

4. Crankshaft Forged or cast One piece or multi
Coverts reciprocal motion to rotary

5. Multi-piece Crankshaft

6. Crankshaft Main Bearings

7. Crankcase seals

9. Piston Construction
One to four grooves

10. Cam-Ground Pistons
Elliptical (oval) shape

11. Piston Thrust Surfaces

12. Piston Head Size
Clearance a few thousands of an inch.

13. Piston Head Shape

15. Piston Rings

17. Piston Ring Types

18. Compression
Oil Control

19. Piston Pin
Floating
Press-fit

21. Connecting Rods and Bearings

22. Friction-type Bearings

23. Antifriction Bearings

24. Intake and Exhaust Ports
2-Stroke
Ports

25. 2-Cycle
Reed Valves

26. 2-Cycle
Reed Valves

27. 2-Stroke
Rotary Valve, page 124

28. 2-Stroke
Rotary Valves

29. 4-Cycle
Poppet Valves
OHV
Side Valve

30. Valve Spring Assembly

31. Camshaft and Gears

33. Valve Lifter or Tappet

34. Valve Train Configurations
Valve in block
Overhead Valve – OHV
Overhead Cam

35. Valve in Block

36. OHV

37. OHC

38. Starter Assembly

39. Automatic Compression Release
@ 600 RPM flyweights retract tabs

40. Flywheel