2003 Yamaha YZ 125 "orange weak ignition spark" Questions

...weak spark is constant (ie:pulsing ) i would guess that the trigger coil is ok.I'd make a check on your ignition coil earths then do a couple of continuity tests on your coil primary and secondary , ...

...weak fire probably, source coil or pickup in stator, or stator itself, if its not a real blue fire, bike will not run, if its sorta orange looking probably, stator, check for shorts in wires

...orange, a weak spark could be the result of a faulty ignition generator or coil, sometimes the spark is controlled by a Capacitor, when these break down the spark will be out of 'Kilter' the Yeti... ...

...off my next step is to check the new plugs to see if they are fowled check plugs for a nice blue spark, if spark is orange, the problem is a weak ignition coil, check its wire contacts, or ...

are getting orange, your ignition system is weak, usually the coil, and needs to be replaced. also make sure to take out the plugs after attempting to start, andmake sure they are wet and getting fuel

...spark at the plugs, a weak spark can cause this. if orange, you may need new ignition coil. if that is well, your carbs need to be tuned, check choke assembly, make sure its openning up afert warn ...