507 Crankshaft and crankcase502 51 34-020.3531 00 60-76Full engine assembly sequence1. Crankshaft with attached piston inthe crankcase.2. Flywheel on the crankshaft.3. Drive cup on the crankshaft.4. Centrifugal clutch on the flywheel.5. Cylinder.6. Ignition module, air gap adjustment.NOTE!Three of the eight screws arefinely threaded and must be usedfor tightening the cover againstthe crankcase.7. Carburettor distancer/heat shieldagainst the cylinder. Tighten the fourscrews crosswise and diagonally.8. Muffler with gasket.Check and replace if required thespark arrestor on the muffler.9. Fuel tank.10. Carburettor, complete with air filterholder.Check that the choke lever arm fitsthe channel on the choke control(see also the “Fuel system” chapterif required).11. Assemble the clutch cover and makesure that the brass bushes are notmisplaced and that the ignition cableand the short-circuit cable are inser-ted in their cable channel.12. Fit the cylinder cover.13. The air filter (oiled), the air filtercover and the spark plug.