Mario Kart 64 doesn't run right in DK JungleParkway. (Runs Fast)

[TomSea64]

I have dumped my wii's internal Nand and playing through mario kart 64 on 1 player grand prix works fine but as soon as i go to two players and play some of the courses the game runs really fast. Why does this happen? Dolphin shows 30fps but the game is almost unplayable due to the fast speed.