ya i have that cam, it works pretty good. it gives a noticable difference every where, but especialy on top. i used it with a ported head, 70 carb/intake(ported), and foam air filter, its a great combination, gives excellent top end for a 50cc!
I think Kitaco's cam works better . we have tryed both and the Kitaco defently adds more pony's . and it is only $75.00 instead of $150.00 for the speed cam
yes that is 2 of the nine bolts put it at top dead center the cam gear bolts should point front to back not up and down mark it and put it back the same way very easy