Report "Husqvarva 610 i have a 1998 bike 4 gears and bottom end went so i bought a new engine of a 2000 bike 6 gears the bike would not start so i changed the magneto and fly wheel of old on to new and it worked 4 a wile then she snaped a woodworth key and the fly wheel got stuck so i cut it of now im back to the old fly wheel and magneto but got no spark wat could it be was thinkin cdi unit how easy would it be change"