2003 Yamaha DT 125 R "spark" Questions

yamaha125dtr got no spark on bike changed spark plug checked coil and fuses ok was sparking fine then stoped Get a BRAND NEW plug and recheck for spark. Be sure plug is grounded to engine. By the way,

i have a weak spark and it keeeps back firing why Few possibilities... high resistance at spark plug (carbon built up) High resistance at spark plug wires. check resistance at magnito. replace as ...

no spark on yamaha dtr 125cc my dtr 125 2stroke will spark but only on the 1st few kicks then it will not spark the naxt few it will fire but not start thanks Sounds like you are flooding the engine ...

Why wont my Yamaha 1976 RX100 have a spark after cleaning a clogged carb and putting it back together? check thru your wiring making sure no wiring is damaged or loose if no problem is found check the