theire harder than hell to put on-- i do drive a 04 Zx3 but maybe its the same idea--- you pretty much have to force them on.....they should stay on with sucktion-- i really hoped I helped but that's all ive got
A little lubricant around the inside edge should help them on. That or some good ole spit ;-)
Make sure you apply even pressure around the circumference, kind of like lug nuts in a star pattern, and bit by bit they'll go on. Test them afterwards to make sure they wont just fall off, I lost one after not checking.