Hey guys, was having real bad problems with old engine on my bike, flywheel nut wasn't tightened up to the correct torque and came loose during riding and mangled up the woodruff key along with they key seat on the crankshaft. Ended up getting another engine off Ebay, replaced the engine and now will not turn over, ruled it down to the spark as there is no spark at all when trying to start engine, spark plug is brand new, ignition coil is brand new, and switched stator coil from old engine and yet still no spark, only thing left is CDI but would a CDI just break like that? any help appreciated before I go and buy a new CDI. Thanks