Discover the  53 key assemblies and genuine parts collections for your  FXDF FAT BOY (GY). Each assembly, such as the Oil Pump, comprises multiple components, each with its own OEM number and detailed information.

Navigate through organized categories of Harley factory parts to quickly locate the OEM parts you're interested in.

Please select a part category below:

 33. SEAT ASSEMBLY
 32. SUSPENSION - SWING ARM W/ BELT GUARD AND DEBRIS DEFLECTOR
 21. BELTS W/ CHAINS AND SPROCKETS
 7. CAMSHAFTS ASSEMBLY W/ CHAINS
 26. BRAKE - REAR BRAKE CALIPER ASSEMBLY
 17. TRANSMISSION HOUSING W/ PAN
 2. ENGINE ASSEMBLY
 18. TRANSMISSION GEARS
 30. SUSPENSION - SHOCK ABSORBERS - HYDRAULIC
 16. TRANSMISSION BEARINGS W/ SIDE COVERS
 44. FUEL TANK DECALS AND NAME PLATES
 27. WHEEL - FRONT (CAST AND SLOTTED)
 25. BRAKE - FRONT BRAKE CALIPER ASSEMBLY
 28. WHEEL - REAR (CAST AND SLOTTED)
 40. TURN SIGNALS - FRONT
 20. CHAIN CASE HOUSING
 14. ELECTRICAL - STARTER ASSEMBLY
 49. HORN ASSEMBLY
 24. BRAKE - REAR BRAKE CYLINDER W/ PEDAL
 10. AIR CLEANER ASSEMBLY
 31. FRAME ASSEMBLY W/ JIFFY STAND
 35. HANDLEBAR ASSEMBLY
 11. ELECTRICAL - ALTERNATOR W/ VOLTAGE REGULATOR
 53. GENERAL AND WARNING LABELS
 48. INSTRUMENT ASSEMBLY
 22. CLUTCH LEVER ASSEMBLY
 42. FUEL TANK ASSEMBLY
 46. EXHAUST SYSTEM - PIPING
 23. BRAKE - FRONT BRAKE CYLINDER ASSEMBLY W/ LEVER
 13. ENGINE SENSORS W/ SWITCHES
 29. SUSPENSION - FRONT FORK ASSEMBLY W/ STEERING STEM
 6. CRANKCASE ASSEMBLY W/ OIL FILTER
 50. ELECTRICAL - WIRING HARNESS ASSEMBLY - 1
 39. FENDERS - FRONT AND REAR
 36. ELECTRICAL - HANDLEBAR SWITCH ASSEMBLIES
 3. CYLINDERS W/ HEADS AND VALVES (REAR SHOWN)
 51. ELECTRICAL - WIRING HARNESS ASSEMBLY - 2
 9. FUEL INJECTION ASSEMBLY
 12. ELECTRICAL - ELECTRONIC CONTROL MODULE W/ COIL ASSEMBLY
 41. TAIL LAMP W/ REAR TURN SIGNALS
 47. ELECTRICAL - BATTERY W/ BATTERY TRAY ASSEMBLY
 15. GEAR SHIFTER ASSEMBLY
 8. ENGINE MOUNTS W/ STABILIZER LINK
 38. HEADLIGHT ASSEMBLY
 52. ELECTRICAL - SWITCHES W/ CIRCUIT BREAKERS
 4. ROCKER ARM ASSEMBLY W/ PUSHRODS (REAR SHOWN)
 34. FOOTRESTS ASSEMBLY
 45. EXHAUST SYSTEM
 37. THROTTLE CONTROL ASSEMBLY W/ GRIPS
 43. FUEL PUMP ASSEMBLY W/ SENDER AND TOP PLATE
 19. CLUTCH ASSEMBLY
 5. CRANKSHAFT ASSEMBLY W/ PISTONS AND FLYWHEEL
 54. EVAPORATIVE EMISSIONS COMPONENTS (CALIF. ONLY)

Simplify Maintenance: Having detailed parts information at your fingertips makes maintaining your  FXDF FAT BOY (GY) easier than ever.

If you're unsure which part you need information on or have questions about the parts for your  FXDF FAT BOY (GY), please refer to your harley service manual or contact us for help.