Here's the main part, the one that is super cool to play. 

The opening has a pretty boring part on OPEN "E".  The rythm should be pretty easy to figure out.

G ---0--20---------
D --2-3------0-3320
A 3---------2------
E ---------3-------

...and reapeat...and repeat...and repeat.

There are a few pauses Where Valens sings "La la la la la bamba", but these are pretty easy to get around. 

This is an extremely fun bass line to play when you are just starting to figure out the rapid finger movment stuff.

This is my first time tabbing something out. Suggestions VERY welcome!