found it..
.1mg Yohimbine HCL per pound of bodyweight
or
.2mg per kg of bodyweight
ALso if you use the Y, its recommended to dose the Y once per day, preferably 4 hrs apart from your Ephedrine dose
example
dose 1: Caffeine, Yohimbine hcl
dose 2: Ephedrine, Caffeine
dose 3: Ephedrine, Caffeine