problems with yamaha dtr 125 2004- no spark!!!

yamaha dtr 125 2004


hi, i have a yamaha dtr 125 2003 model. i have had it running and there was a buzzing sound coming from the back and it was bogging out, no i have no spark at all so it wont start, would it be a little white box under the rear mud guard?? sm 1 help me plz!!!!!!!!!!! thanks lewis

I have no idea what the little white box is. I'd check the spark plug gap first, and also make sure that the cap is totally on the plug. If those are good, check the ignition coil(s) primary and secondary continuity (If possible) and also the pulser coil.

the spark plug and cap are fine, it seems something as gone on the electrics,we have cleaned all of the connections to, ill check the coils and see if it is them, thanks lewis