It's the special treasure that depletes the area. I found one part before finishing the story line. Now that I've finished the story line, I have not found a single speeder part. But I have a complete second set and three extra belts, two extra pants, a few bracers etc.
They need to allow us to turn off armor search or something.
Yeah I know what you mean, managed to get the other 2 speeders but pleasure one is impossible this way. Got half dozen bracers and gloves from searching