<<Charles is correct, ZX-11 is bigger 6.3 gal, I think. Gpz is 5. something>> 5.8 Ralph L. Angelo Jr. Author of "Help! they're all out to get me! The motorcyclists guide to surviving the everyday world." ISBN# 1-4137-6187-9 http://helptheyreallouttogetme.com Check out LIMELongriders NEW site; http://LIMELongriders.info