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2003 Honda CRF 450 Carburetor Disassembly

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  1. 2003 Honda CRF 450 Carburetor Disassembly, Turn Fuel Off: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Move the fuel lever from the on position to the off.

  2. 2003 Honda CRF 450 Carburetor Disassembly, Drain Pan: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Place a drain pan under the motorcycle to catch any excess fuel.

  3. 2003 Honda CRF 450 Carburetor Disassembly, Remove Seat: crwdns2935265:03crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Seat: crwdns2935265:03crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Seat: crwdns2935265:03crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Remove the two bolts from each side of the seat with a 10mm socket.

    • Lift up on the rear of the seat to remove.

  4. 2003 Honda CRF 450 Carburetor Disassembly, Loosen Air Intake Boot: crwdns2935265:04crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Loosen the screw with a phillips head screwdriver so the clamp can move freely.

  5. 2003 Honda CRF 450 Carburetor Disassembly, Exhaust Bolt: crwdns2935265:05crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Exhaust Bolt: crwdns2935265:05crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Loosen the 12mm bolt to separate the exhaust muffler from the exhaust header.

  6. 2003 Honda CRF 450 Carburetor Disassembly, Lower Sub-Frame Bolts: crwdns2935265:06crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Lower Sub-Frame Bolts: crwdns2935265:06crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the 10mm lower sub-frame bolts on each side of the motorcycle.

  7. 2003 Honda CRF 450 Carburetor Disassembly, Upper Sub-Frame Bolt: crwdns2935265:07crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Upper Sub-Frame Bolt: crwdns2935265:07crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the 10mm upper sub-frame bolt from the motorcycle.

  8. 2003 Honda CRF 450 Carburetor Disassembly, Sub-Frame Removal: crwdns2935265:08crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Sub-Frame Removal: crwdns2935265:08crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the sub-frame assembly from the rest of the motorcycle.

  9. 2003 Honda CRF 450 Carburetor Disassembly, Remove Fuel Line: crwdns2935265:09crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Fuel Line: crwdns2935265:09crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Fuel Line: crwdns2935265:09crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Using needle-nose pliers, loosen the clamp and slide it forward on the fuel line. Then remove the fuel line.

    • The fuel line should contain a small amount of fuel, so beware of spillage.

  10. 2003 Honda CRF 450 Carburetor Disassembly, Loosen Clamp: crwdns2935265:010crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Loosen Clamp: crwdns2935265:010crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Loosen the clamp on the front of the carburetor with the Phillips head screwdriver.

  11. 2003 Honda CRF 450 Carburetor Disassembly, Remove Shock Bolts: crwdns2935265:011crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Shock Bolts: crwdns2935265:011crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the top and bottom shock bolts with 17mm socket.

  12. 2003 Honda CRF 450 Carburetor Disassembly, Remove Shock: crwdns2935265:012crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the shock from the motorcycle.

  13. 2003 Honda CRF 450 Carburetor Disassembly, Plastic Cover: crwdns2935265:013crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Plastic Cover: crwdns2935265:013crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove this screw with the 4mm hex key

    • Now remove the plastic cover, allowing access for the removal of the throttle cables.

  14. 2003 Honda CRF 450 Carburetor Disassembly, Slack Adjusters: crwdns2935265:014crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Slack Adjusters: crwdns2935265:014crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Loosen the top and bottom slack adjusters. This will allow you to slide the slack adjusters out from the body of the carburetor.

  15. 2003 Honda CRF 450 Carburetor Disassembly, Side Shrouds: crwdns2935265:015crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the side shrouds from the motorcycle by loosening the four 8mm screws. Complete this step for both sides of the bike.

  16. 2003 Honda CRF 450 Carburetor Disassembly, Fuel Tank Bolts: crwdns2935265:016crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Fuel Tank Bolts: crwdns2935265:016crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the 8mm bolt above the fuel tank.

    • Remove the safety clip at the bottom of the fuel tank.

  17. 2003 Honda CRF 450 Carburetor Disassembly, Fuel Tank Removal: crwdns2935265:017crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Fuel Tank Removal: crwdns2935265:017crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove the 8mm bolt from the fuel petcock.

    • Then remove the fuel tank from the motorcycle.

    • Tilting the fuel tank (second picture) will keep it from draining/spilling.

  18. 2003 Honda CRF 450 Carburetor Disassembly, Wiring Harness: crwdns2935265:018crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Gently press on the plastic release on the clip to separate the wiring harness from the carburetor.

    • Be careful not to break the plastic clip.

  19. 2003 Honda CRF 450 Carburetor Disassembly, Hot Start Cable: crwdns2935265:019crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Hot Start Cable: crwdns2935265:019crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Un-thread the 13mm plastic hot start cable from the carburetor.

  20. 2003 Honda CRF 450 Carburetor Disassembly, Remove Carburetor: crwdns2935265:020crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Carburetor: crwdns2935265:020crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • At this stage, everything should be disconnected and the carburetor can be removed from the motorcycle.

    • The carburetor will more than likely still contain fuel, so be careful transporting it to the area where you will disassemble it.

  21. 2003 Honda CRF 450 Carburetor Disassembly, Clean Carburetor: crwdns2935265:021crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Clean Carburetor: crwdns2935265:021crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Gently brush and blow off any debris from the carburetor.

  22. 2003 Honda CRF 450 Carburetor Disassembly, Disassemble Carburetor: crwdns2935265:022crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Disassemble Carburetor: crwdns2935265:022crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Loosen and remove the 5 screws at the bottom of the carburetor, with the Phillips head screwdriver, to detach the bowl. Then remove the bowl.

  23. 2003 Honda CRF 450 Carburetor Disassembly, Remove Float: crwdns2935265:023crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Float: crwdns2935265:023crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Float: crwdns2935265:023crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Remove the shaft from the two posts sticking up on the inside of the carburetor.

    • Remove the float.

  24. 2003 Honda CRF 450 Carburetor Disassembly, Remove Jets: crwdns2935265:024crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Jets: crwdns2935265:024crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 2003 Honda CRF 450 Carburetor Disassembly, Remove Jets: crwdns2935265:024crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Remove the jets from the body of the carburetor.

    • Thoroughly clean all jets and body of carburetor.

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To reassemble your device, follow these instructions in reverse order.

Tony Rhodes

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