my 87 banshee has been at the shop for a year now, and the dumb ass mechanic cant figure it out why the bikes spark goes away after the bike first initially fires we have changed the stator,fly wheel and voltage regulator, and tested the coils and plug wires to find nothing wrong, the mechanic said i need a cdi and got one from dyna ignition in california and i live in ontario canada it takes 6 days for the cdi to get here and yet we are not convinced that will fix the problem i dont know what is wrong any idea's???