pretty easy theme song....im 100% sure on this...

main riff (ditorted)
E|----------------------------------------|
B|----------------------------------------|
G|-----------5-(x16)----------------------|
D|-5--(x16)--5----------------------------|
A|-5---------3----------------------------|
E|-3--------------------------------------|(repeate as needed)

this part is sometimes played when showing where they are 
cranking to.

E|-----------------------10---------------------10--------------------|
B|-12--12--10--8--10--12-----12--10--8--10--12------12--10--8---------|
G|------------------------------------------------------------9--7----|
D|--------------------------------------------------------------------|
A|--------------------------------------------------------------------|
E|--------------------------------------------------------------------|

E|-----------------------10---------------------10---------------------|
B|-12--12--10--8--10--12-----12--10--8--10--12------12--10--8-----7--8-|
G|-------------------------------------------------------------9-------|
D|---------------------------------------------------------------------|
A|---------------------------------------------------------------------|
E|---------------------------------------------------------------------|

there ya go..not that hard..took me 5 min to figure out! enjoy