last night i started the bike up and got it to warm up. it idles right where i want it to but even with the slightest twist of the throttle climbed and stayed there. i'm assuming that either means i got a vacuum leak from hell or my throttle cable is sticking. one of the casings on the throttle cable is damaged and has been damaged since i got the bike but i don't know if its the reason for this problem. any way i can test which it is?