trying to sell my 02 YZ f had it running this weekend after sitting for three months, had it running Monday, started it again Wednesday. had a friend come to look at it today and no fire. thought maybe the carb got dirty gave it a shot of starting fluid, no fire. pulled the plug no spark at all. went to the store got a new plug, Still no spark. the thing was started Wednesday loaded in the truck brought home and put in the garage. I was so frustrated today that I had enough patience to look through all the wires and I don't see any thing that seems messed up. can anyone give me an idea where to start? literally cold started in 2 kicks eve time ive started it and now no spark AT all. really Ped me off specially when I looked like an idiot in front of my friend who wanted the bike.