i had same issues,
1. i ditched timing light
2. i set at 1.56 BDC
3. check your grounds, i had to sand the powdercoating/paint off to make a good contact. also i double grounded everything on my bike. maybe that's overkill? i have good spark, i set the timing two years ago, my bike does over 60 and never once an issue. (an issue with the HPI at least)
i hardly check MA, at least the gen forum so feel free to email me and i'll be more then happy to help you. nothing worse then spending a shit ton of money on a part that is suppose to be magical, getting 72 different opinions on "how you're doing it wrong", and finally getting your answer a month later. find the thread that has the step by step instructions, go thru everything again to make sure all variables are covered and then give me a call or good luck to ya.