You will have to have a ignition for a 90cc so i would buy a pvl if the class permits it and i would also get and over range kit if it does not already have that.My son races races mx so i really don't know what spring/belt/roller combo will live an hour through the woods but i'm sure some one will chime in here to help you.
TS RACING
Tanner Sorrow #12
90 OPEN
90 AUTO SENIOR
Thanks to Tom and Atv 4 Play
Thanks to Norris@ Quinn Motorsports
2012 DURHAMTOWN BOMBER/PEEWEE 70CC CHAMPION
2013 DURHAMTOWN PEEWEE 90CC CHAMPION
2014 DURHAMTOWN BOMBER 90CC CHAMPION