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Head light does not come on until you cross jump silinoide I know that silniode is bad but it has'nt blown any fuses could igniter be bad I have no fire coming from coils
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Without knowing what it is you are working on, it might be a blown fuse or a bad spot in a fuse box or power distribution box, or maybe a bad ignition switch or bad ground.
Check starter relay,ignition switch or see if theft deterrent is active,if you go where starter is at the bottom and jump positive and negative at the silinoid from starter you might be able to cancel one of the possibilities if it turns over and at starter if you have a tester and the small post on silinoid wich has a S somebody turns switch and connect tester to negative on battery you see a light come on when somebody turns key forward if not issue with ignition switch.
jump silinoid switch at the switch wires do they activate the silinoid switchif not silinode is bad look for the starter relay switch behind the dash and also check the fuse there make sure not blown
Typically Yamaha used the firing cycles off one coil for input to the tach. The noise you hear may be misfiring on one or more cylinders. When tach drops to zero cylinder coil isn't firng, when it jumps up its firing again.
The erratic tach usually means an igniter (ignition black box) problem.
Get a manual and start with testing the pickup coils, they signal the igniter when to fire the ignition coils.
Then test the ignition coils for primary and secondary resistance, check igniter connectors for clean tight connections, full battery voltage supply to igniter etc..
Occasionally getting the igniter wet can cause erratic behavior till it dries out.
if no spark plugs are firing then check to see if you have voltage to the coils. if you do not it may be a bad ignition switch or a fuse could be blown in fuse box. because about 50% of the power supply to engine, comes from ignition switch or through it. good-luck !!
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