I am tuning my bike up heavy duty redoing gaskets and what not. I went to try and start my bike and it wouldnt start. I bought a new spark plug and did a spark test Im getting nothing. Is it most likley the CDI or the magneto? I am guessing the CDI just because that seems more common. How do you determine which to replace? or is replacing both at once best? Also where would I find a CDI that is desighned for my bike? it is an 80cc 2 stroke motor. I cant wait to get this thing running again. please help