no spark?

yamaha205205

New Member
Mar 3, 2010
264
2
0
Menasha, WI
so i went riding and it started bogging on me and wouldnt start again so i pulled the plug and it was foled so i went to get a new one and put it in and didnt start....so i checked for spark and nothing so i took it home and finally got around to looking at it and checked if the flywheel was loosened but it was fine and checked the grond wires but they were also fine so im lost any help?