Help!

I cant get this bad pump to get away! ive been trying to fix it for a day!!

Use shorter segments. Try splitting up the segments on either side of the vertex, deleting the vertex, ctrl G, re-add the vertex, and do this as much as needed. If the banking is shaky from too many vetices close together, delete some of them.

[Turbo]

When hand building (I do this too) try to keep your track segments around the same length, use smaller segments, ctrl+g is your friend, don't edit vertexes in 3D mode (infinitely harder that way)

I'm sure there are more tips I can give I'm just drawing a blank right now

Also, use the iSmooth technique (this only works if your segments are approximately the same length which they should be if you want a smooth track). First, select a segment and hit ctrl+I to straighten it. This will make it so the handles controlling the segment will even out (don't know how else to explain it). Then, select the segment and the two vertices on either and and hit ctrl+G to smooth. I like to do the "delete and split" technique after I've done this as is makes it smoother without too much work on your part.

The delete and split technique is simply deleting a vertice (what's the singular form?) and smooth (ctrl+G) the segment it was on, then, split that segment to replace the vertice you deleted.

If you need help understanding this let me know.