Okay, here it is:  Riff Tab for "Is It Luck?" by Primus.

Note: I didn't figure this out.  It was in the August 1991 issue of Guitar
Player....

  e  s s  s s s s  s s s s  s s r     e  s s  s s s s  s s s s  s s r

—————Xh6———————————Xh5—————————————|—————Xh7———————————Xh6———————————————|
——X———————Xh7—Xh6——————Xh6——Xh5————|——X———————Xh8—Xh7——————Xh7——Xh6——————|
———————————————————————————————————|—————————————————————————————————————|
———————————————————————————————————|—————————————————————————————————————|

Just a reminder.....

X —— muted note
h —— hammer—on
e —— eighth note
s —— sixteenth note
r —— rest

A few notes Les gives:

"I play it on the 4—string.  I hold on to the whammy bar while I slap, which
gives it a real weird sound.  It's all on the D and G strings, and the second
bar is the same as the first, but up a half—step."

Another note: Les uses standard tuning, but instead of standard strings on his
4—string, he uses two A's and two G's to help out with his chords.

Have fun!  Later,
—Chris Carman
—[email protected]