Rocker Boxes
Technical information on the rocker boxes for Harley-Davidson motorcycles. This diagram provides a parts detail for Evolution engine rocker boxes.

Rocker Box Parts List

1. Screws (4)
2. Fiber seal (4)
3. Umbrella Valve (2)
4. Upper rocker cover
5. Middle rocker cover
6. Gasket
7. Gasket
8. Gasket
9. Rocker arm shafts
10. Rocker arm
11. Rocker arm
12. Bolt and washer (2)
13. Bolt and washer (2)
14. Screw and washer (2)
15. Bolt and washer (3)
16. Gasket
17. Gasket
18. Lower rocker arm cover
19. Rocker arm bushing (8)