3-40
GEARCASE COVER AND CAM GEARS
GENERAL
Read the complete gearcase section carefully before you
begin any service work.
For the gearcase components to operate at their optimum, all
components must be properly fitted and matched. Changing
one component can affect many others. It is important to
know and understand all inspection procedures and how
components interact.
REMOVAL/DISASSEMBLY
1. See Figure 3-51. Thoroughly clean area around gear-
case cover (17) and tappets. Blow loose dirt from crank-
case with compressed air.
2. Remove any parts that will interfere with gearcase disas-
sembly (i.e., exhaust header, footrest, air cleaner, etc.).
3. Remove push rods as described under CYLINDER
HEAD, REMOVAL on page 3-11.
4. Remove tappets. See VALVE TAPPETS, REMOVAL on
page 3-38.
Figure 3-51. Gearcase and Valve Train Components
1. Rear exhaust cam gear
2. Rear intake cam gear
3. Front intake cam gear
4. Front exhaust cam gear
5. Pinion gear
6. Seal
7. Front intake cam gear bushing
8. Front exhaust cam gear bushing
9. Gearcase cover gasket
10. Right crankcase half
11. Nut
12. Oil pump drive gear
13. Cam gear bushing (4)
14. Rear exhaust cam gear bushing
15. Rear intake cam gear bushing
16. Pinion shaft bushing
17. Gearcase cover
14
1
13
13
2
15
3
4
13
7
8
13
12
5
16
11
10
9
17
6
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