2003 Honda CRF 450 Carburetor Disassembly

Move the fuel lever from the on position to the off.

Place a drain pan under the motorcycle to catch any excess fuel.

Remove the two bolts from each side of the seat with a 10mm socket.

Lift up on the rear of the seat to remove.

Loosen the screw with a phillips head screwdriver so the clamp can move freely.

Loosen the 12mm bolt to separate the exhaust muffler from the exhaust header.

Remove the 10mm lower sub-frame bolts on each side of the motorcycle.

Remove the 10mm upper sub-frame bolt from the motorcycle.

Remove the sub-frame assembly from the rest of the motorcycle.

Using needle-nose pliers, loosen the clamp and slide it forward on the fuel line. Then remove the fuel line.

Loosen the clamp on the front of the carburetor with the Phillips head screwdriver.

Remove the top and bottom shock bolts with 17mm socket.

Remove the shock from the motorcycle.

Remove this screw with the 4mm hex key

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

Loosen the top and bottom slack adjusters. This will allow you to slide the slack adjusters out from the body of the carburetor.

Remove the side shrouds from the motorcycle by loosening the four 8mm screws. Complete this step for both sides of the bike.

Remove the 8mm bolt above the fuel tank.

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

Remove the 8mm bolt from the fuel petcock.

Then remove the fuel tank from the motorcycle.

Gently press on the plastic release on the clip to separate the wiring harness from the carburetor.

Un-thread the 13mm plastic hot start cable from the carburetor.

At this stage, everything should be disconnected and the carburetor can be removed from the motorcycle.

Gently brush and blow off any debris from the carburetor.

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.

Remove the shaft from the two posts sticking up on the inside of the carburetor.

Remove the float.

Remove the jets from the body of the carburetor.

Thoroughly clean all jets and body of carburetor.