REMOVAL AND INSTALLATION

Removal steps >>E<< 1. Balancer shaft gear RH >>E<< 2. Thrust spacer >>E<< 3. Oil pump assembly 4. O-ring 5. O-ring 6. O-ring 7. Plug 8. Relief valve spring 9. Steel ball 10. Oil pump cover 11. Driven gear assembly >>E<< 12. Gear and body assembly >>E<< 13. Key >>E<< 14. Balancer shaft RH 15. Idler washer A 16. Idler gear assembly LH 17. Idler gear LH <<A>> >>C<< 18. Idler gear bush LH 19. Idler washer A >>D<< 20. Balancer shaft gear LH >>D<< 21. Thrst spacer >>D<< 22. Thrst plate >>D<< 23. O-ring >>D<< 24. Key >>D<< 25. Balancer shaft LH >>B<< 26. Idler gear and sprocket assembly 27. Idler gear and sprocket <<B>> >>A<< 28. Idler sprocket bush >>B<< 29. Idler shaft

BACKLASH OF EACH GEAR Measure backlash between gears, pair by pair, at three or more point. If the reading exceeds the specified standard value, replace defective part.

END PLAY If the reading exceeds the specified standard value, replace defective part.

Using the special tool idler gear bush puller (MH062463), remove the idler gear bush LH.

Using the special tool Idler sprocket bush puller (MH062462), remove the idler sprocket bush.

Press-fit the idler sprocket bush into the idler gear and sprocket from the side showing the match mark "o".

Install the idler gear and sprocket assembly onto the idler shaft while aligning the mark "1" with that on the crankshaft gear.

Press-fit the idler gear bush LH into the idler gear LH from the side showing the match marks "3" and "o".

1.Install the balance shaft LH assembly as follows:

Assemble the parts shown in the illustration to the balance shaft LH and secure them by tightening the bolt to the specified torque. Be sure that the washer and thrust spacer face in correct direction as shown. Install the balance shaft gear LH with the side showing the match mark “o” outward. A: Shear droop side Insert the completed balance shaft LH assembly into the crankcase assembly, set it in position with the dowel pin on the crankcase assembly and secure it with bolts. caution Do not rotate the balance shaft LH assembly during insertion into the crankcase assembly. This may cause the O-ring to be slipped out of place. Insert the balance shaft LH assembly using care not to damage the inner surface of the rear bearing in the crankcase. Install the idler gear LH assembly onto the idler shaft.At this time, be sure to align the match marks "3" and "o" on the idler gear with the corresponding match marks on the idler gear and sprocket assembly and the balance shaft gear LH. Then, install the idler washer to the idler gear LH assembly with its front mark "F" facing outward.

Install the balance shaft RH assembly as follows:

Assemble the parts shown in the illustration to the balance shaft RH and secure by tightening the bolt to the specified torque. Be sure to install the washer and thrust spacer in the direction shown in the illustration, and install the balance shaft gear RH with its mating mark “o” aligned with the mating mark “6” on the oil pump gear. A: Shear droop side Insert the completed balance shaft RH assembly into the crankcase assembly while aligning the mating marks “5” on the oil pump gear and the crankshaft gear, and set the shaft assembly in position with the dowel pin on the crankcase assembly and secure it with bolts. caution Insert the balance shaft RH assembly using care not to damage the inner surface of the rear bearing in the crankcase. After the timing gear are installed in position, check that all the rotary parts smoothly rotate.