dont use a drill to tap the threads use a hand wrench, blow them out real good to when your done, i got the vitos kit and it came with directions but you can also youtube it, you gota sync your carbs after too
its easy i just did mine, just go slow when your drilling and use some oil on the bit and tap, just make sure you file the boss's down good enough or the idle screws wont touch the slides
list your mods if you have any, as for the tors you can unplug the box under the gas tank it will run fine but it wont idle if you broke one of those screws, and when you got it started did it rev up or what?