Well in my own opinion, sppedster or jetski, you dont have an early to mid 90's model with the hot pink and other crazy colors that most of us got stuck with, so i would personally keep them on, unless you go with an UPGRADED set of custom vinyls...
mines a 96, DOESN'T have hot pink, but i do have the outdated zig zag OEM sticker kit, so i took it all off in one piece using aircraft grade finish remover from walmart, and the thing literally looks ten times better, just being all white with the green seat and bars...I even took of the BRIGHT EASTER EGG PURPLE hydroturf mats that were WORSE than the originals..I"ve been slippin in the meantime until i get an updated mat set, but it looks so much better...
so, i would leave it alone...