i got a few videos of me racing 2 predators. one an 05' and the other an 03'
the first one i got a shitty start, so it came close.
http://www.youtube.com/watch?v=r1DQCNWiIFs
a rematch..
http://www.youtube.com/watch?v=dtg6IgS-LJI
and this is the 03'
http://www.youtube.com/watch?v=yJHkLXTRAsg
both predators had pipes, jetted carbs and k&n filters
mine had pipes, jetted carbs, K&N filter and stock pistons from the factory since 2003, i had very low compression ( did the rebuild over the winter )
your bike should of bet the ex and the Z no trouble.