QuestionQUESTION: I over heated my bike while idling in my garage. I heard the bike die went out to check it & it was really really hot. The next day I changed the spark plugs & oil before i tried to start it again & NOW I'm getting no spark to the plugs.
ANSWER: I know it sounds dumb, but is the kill switch turned on?
It's a mistake we all make from time to time....
If that's not it, get out your shop manual and start doing all the tests for the ignition system.
I'm not really familiar with the 500f (my Suzis were both GS400s and the newest one was an '83), but it could be anything from a blown fuse or a wire that you accidentlly disturbed while working on it to a heat damaged coil, pulser or electronic ignition module.
BTW: If you don't already have one, I highly recommend getting a shop manual if you are going to do any work on your bike. Sometimes things that seem obvious aren't and the manual can save you a lot of work (& sometimes a lot of expense).
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QUESTION: I checked the coil with a meter & it said that I have power to my plugs But it won't ark. Should I have power to the plugs even when I'm not cranking the bike over? The key is turned on but I'm not cranking it over When I'm testing the power to the plug it reads 11.55. Then when i test it while I'm cranking it over the power drops to around 9.5
AnswerDo you mean the voltage at the spark plug or at the coil's electrial connector?
The voltage at the coil's electrial connector should be the same as at the battery. (The ignition electronics control the connection between the coil & ground.)
11.55 is a bit lower than normal but reasonable if you have been cranking it a bit without starting it and 9.5 while cranking is fine.
If you are getting those voltages at the spark plug there's probably something wrong with the coil.
When you check for spark do you have all of the plugs grounded? If one plug connected to a given coil is not grounded or it's plug wire is disconected the other plug can't fire.
Most bikes use something called the "wasted spark" system where the same coil fires 2 plugs at the same time - one in the cylinder that's at TDC of the compresion stroke and one that's at TDC of the exhaust stroke. Since what's in the cylinder that's at TDC of exhaust isn't going to burn that spark is wasted.
One end of the coil's secondary (high voltge) winding is connected to each of the plugs and there is no direct connection between the secondary and ground. This means that unless both plugs are connected to ground the circuit is not complete and both plugs won't fire.
Without access to a shop manual and/or wiring diagram I don't think I can offer you much more help. As I said before, you should have a shop manual and it can tell you a lot more than I can.
You should also consider joining a discussion forum for bikes like yours. www.thegsresources.com is pretty good.
