WHen I'm driving and I want to give some gas it seems like my 2004 883sportster is dieing, so I have to let up on the throtle so the motor can take in the gas a little at a time
It sounds like your accelerator pump on the carburetor is not working. Take you air filter cover and air filter element off the carb. With the engine NOT running, look into the opening of the carb. In the opening you'll see a small brass tube standing just off to one side of the center of the opening. This is the accelerator pump nozzle. Now, crank the throttle wide open. When you do this, you should see a stream of fuel come out of the nozzle and squirt into the mouth of the carb. If it does not, your accelerator pump is not working and the accelerator pump diaphragm must be replaced.
To replace the diaphragm, you must remove the air filter backing plate. Now, you can either take the carb off the engine or you can simply remove the float bowl to replace the diaphragm. To take the carb off the engine, you'll have to disconnect the fuel lines, the throttle and idle cables, and the enricher (choke) cable. Pull the carb out of the intake manifold.
Remove the four screws that hold the float bowl onto the bottom of the carb. Lower the bowl and remove it from the carb. Turn the float bowl upside down and there will be two screws that hold the accelerator pump plate onto the float bow. Remove these two screws. Under the plate you'll find a spring, one or two small o-rings, and the diaphragm. Simply remove the diaphragm, pay particular attention to which side is down. There should be a ridge on the bottom side (upside down) that goes into a groove around the accelerator pump chamber. Put the new diaphragm in, set the spring on top of the diaphragm, make sure the small o-rings are properly positioned and install the outer plate with the two screws. Replace the float bowl on the bottom of the carb. Make sure you get the accelerator pump pushrod back into the hole in the float bowl that it goes into that you properly align the nozzle with it's hole. NEVER TURN OR TWIST THE NOZZLE, It is pressed in and not designed to be turned. Do so will damage the float bowl. Replace the screws that hold the float bowl on. Replace the air filter backing plate.
Now, You must get the bike started. Since there is not fuel in the float bowl, it is not going to start right up unless you've replaced your fuel petcock with a manual petcock. To get fuel in the bowl, you'll probably have to spin the engine a bit. While doing this, work the throttle grip and you should see the fuel start to squirt from the nozzle once you get the fuel in the bowl. Then you engine should start.
Dec 11, 2010 |
2004 Harley Davidson XL 883 Sportster