Today I replaced the lower switch housing on throttle side which required the removal of the throttle cables from handgrip. I replaced everything to its proper place, but now when I give it gas at the throttle it doesn't return to its neutral position, I have to manually do it. Any ideas on what the cause is and the fix is?

It's on a 2001 Fatboy FLSTF

 

Did you check the (star shaped) throttle lock underneath the switch housing? Maybe it's screwed in too tight. Otherwise make sure the grip itself isn't rubbing on the end of the handlebar. The next thing would be to adjust both cables per service manual. If you don't have a service manual, well, get one.

 

It just a matter of adjusting the cables properly at the grip.

Two cables, one is the throttle cable and the other is the idle cable.

Turn the wheel all the way to the right. Roll the throttle open and it will stick really bad. Loosen and back off the idle cable until the twist grip snaps back.

 

You may not be surprised that we get a steady trickle of questions like this. You worked on something and now that same thing doesn't work! The first course of action is to carefully dismantle everything you just put back together and check that it is correct. Leave the screws loose once rebuilt and check to see if the twistgrip moves freely. Only tighten up when all is well. Don't alter anything this time that you didn't disturb last time.