For most of the song the main riff is this
[ Tab from: http://www.guitaretab.com/g/gnarles-barkley/324860.html ]
e|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|--10h12-10---------------8--8-8-8-----12p11p10-10---------------8-8-8-8----|
E|-----------10-10-7h8-10---------------------------10-10--7p8-10------------|
The riff changes around the chours
e|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|--10/12--------------------------------------------------------------------|
A|---------10--7h8h10--------------------------------------------------------|
E|---------------------7h8h10------------------------------------------------|
