2003 Yamaha YZ 125 "spark coil" Questions

...coil with the spark plug wire attached. If you can see arcing at the mount bracket where the high tension coil mounts to the frame, either the coil is bad or the plug wire is bad. Some coils allow ...

...help me with checking the electrical system? please replace the ignition coil, and spark plug, check the source stator from the engine / replace if possible, if problem persist, replace the cdi

...coil was a little messed up so i fixed that now, the spark is strong but goes off every like 2-3 engine rotations... If there was a probem with the coil the extra loading from the short circuit may ...

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 , orange

...coil to dealership, they will test for free. if thats all good, yes its the cdi. but since this bike is so new, make sure your spark plug cable contacts are clean and good, specially if you have been ...

I have a 1978 yz 125 with a poor spark. It won't stay running. poor spark or poor compression, replace the spark plug cap (piece that goes on spark plug to coil wire)

coil with used parts. Only has spark when you turn keyed swith while cranking over motor.Also sparks once with kill switch turned off.Conections look ok in kill switch. Wireing looks ok too. It sounds

...spark. Any suggestions? switchs make sure that they all are working, if so check your pick up take a test light see if it flashes when you spin the motor check it at the coil wire if so your coil may ...