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Re: Zi 900 short circuit
Hi ...... Could be almost anywhere. Have you recently had any work carried out ? Gonna be a 'long' process but try with ignition off, change fuse, and one after another disconnect main/plug connectors in the loom ................ with any luck you'll isolate the problem to a section of the loom or component. You may need a few fuses. Finish off with a multimeter.
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Somewhere there is a short circuit allowing the current to flow straight to earth on the engine or the frame. Blowing a 10 amp fuse means this is a very heavy current so do not be tempted to either fit a higher rated fuse or bypass the fuse. Almost certainly this would cause burnt out wiring and possibly start a fire.
This happened when you switched on the ignition and before you pressed the starter on one occasion. On other occasions the bike has started before blowing the fuse. This suggests that perhaps wiring with damaged insulation is making and breaking contact.
You said you have a new battery. Is it possible that during the fitting of this some damage was done to the wiring? Do you have a meter or can you borrow one? See if you can find out where this current is running to earth without replacing the fuse. ie check after the fuse with a meter.
At times like this it is good to have a friend that is an electrician to help you check.
backfiring through the carb sound like a timing issue, odd though, should me an automatic adjustment, may have slipped a tooth on the cam witch may indicate a bad timing chain or chain tensioner/guide, May also be a serious carb adjustment is required.
Sounds like something has clogged one of the pilot jets in the carburators. You can figure out which one by feeling which pipe is cold after running for a short time. Probably best to clean all 3 carbs while you have them off.
Harley horns fail. Replace the horn. If this fault has happened at the same time as engine wont crank then problem with wiring. If not then check starter relay (grey one). Also check ignition switch. Are the head lights coming on when turned on? If so the ignition switch is o/k. Connect a voltmeter to horn to check horn circuit. Accessory fuse 15 Amp supplies horn circuit and brake light and turn signal circuits so if these are working fuse o/k. Ignition/start circuit requires system relay and ECM fuse to be o/k. If fuel pump operates when run switch is activated then system relay o/k. Check start relay and circuit to start button.
Your valve stem seals have shrunk and or perished and you need to have them replaced. While your getting that done, you may as well check your valves at the same time and make sure that they have a good seal. Put the head in to be reconditioned, it will breathe a new lease of life in to the old girl.
Hi, they used points and condensors on the very early gl1000' but your model has electronic ignition and does not use points and condensors, more the pitty in the old days you had points condensors and ignition coils, if you had a problem it was far easyer to trace the fault, but now with pulse generators etc its more difficult to diagnose without diagnostic equiptment, and to expensive to re
It never hurts to check your grounds, they have a habit of loosening up. It sounds like either the voltage regulator or the stator is failing to me. If you can get it to fail at home take a multi-meter and get a reading on the stator, I don't know the values on a dyna, but you should get a reading at idle and it should climb as you rev the motor. When my sporster did this it turned out to be the stator.