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No Spark Situation, Signal Generators?

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    No Spark Situation, Signal Generators?

    Bike is an '82 GS450. Just got new used igniton coils (Thanks Ryan!) to replace the one that I fried when I started the bike, I figured I'd replace both anyway. I don't have a charged battery and in my "wisdom" I let the bike run with the battery charger on 40 amps so the left coil puked and smoked, but it would still run off the right-side cylinder (I didn't run it long like that and I remembered to disconnect the charger this time), but it did randomly die. I figured the left side carb flooded a good bit and that caused it to die. Well I grounded the right-side plug and no spark .

    New coils are on and I grounded them again, both this time, still no spark. I'm unsure as to where the signal generators are on the motor??
    I'm going to check the ignitor to rule that out as well. And how would I know if I need a new recitifier?

    I'd love to get this thing running and out of my great grandmother's garage this week and get to know the bike on the backroads before I go tearing it apart again later on.

    I'm going to post this up in here so I know where to go to get to it

    (Remove spark plugs 1 & 2 and ground them to the motor so they will fire when they get power. With the ignitor facing you, the plug on the right side of the ignitor is where the signal generator plug fits. The two terminals on the right side of that portion of the ignitor will be pin 1 at the front and pin 2 at the back. The two left pins will be pin 3 in front and pin 4 at the back. Turn the ignition switch on. With a multitester set a the X1 ohm range put the + probe on pin 2 and the - probe on pin 1. Plug number 1 should fire. Next put the + probe on pin 4 and the - probe on pin 3. Plug number 2 should fire. If this happens the ignitor is good and the signal generators are suspect.)

    #2
    I'm unsure as to where the signal generators are on the motor?
    Under the cover on the right side of the engine.

    And how would I know if I need a new recitifier?
    Check the stator papers

    Comment


      #3
      Would doing what I described above likely fry the ignitor or R/R? I know that the stator is good (or at least was?) since it, along with the battery charger, where able to cook the left ignition coil. But the bike would still run just as smooth after that on just the right cylinder until it randomly died. Figured it was from flooding the carbs since it would only run on full choke - airbox wasn't on, and the plugs were fouled when I took them out which led me to believe that they flooded.

      On another note, does anyone have a picture of the R/R, Ignitor Box, Fuse and Relay panel on one of the twin bikes? There was something funky going on with the ground wiring that I attempted to fix.

      Comment


        #4
        Well now it won't even roll over with the starter button. Button stopped working after I cleaned the ground connections for the R/R and Ignitor? I'm at a loss.

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          #5
          I feel bad for the bike..your killing it. First you electrocute it..then try to drown it in gasoline. You should just take it out in the woods and shoot it.

          Comment


            #6
            Yep, I'm pretty much on my own since I'm new to bikes and there's not really anyone around here that knows jack to ask for help, which is why I signed-up on the forums here. There's not many people that care around here, they would all rather say to junk it and get a new one.

            Btw, if you happened to see my first thread in the tech section here, I acquired it in pretty sore shape, wouldn't do anything before I got it. It was in peices and buried in a garage after being on by two mechanically not-so-inclined people that tried to fix it the JB Weld and ducktape way.
            Last edited by Guest; 06-16-2009, 12:11 PM.

            Comment


              #7
              My advice to you is get a service manual and go through each system and correct the problems you find. Learning to fix the bike yourself is what makes the whole process fun. I was just poking fun, not trying to discourage you. I have resurrected two old bikes and it can get frustrating at times, especially if you don't have the information you need. Don't give up. There are quite a few members on this forum that are from Ohio. Steve, TheCafeKid, OhioEric, 77GS750inCincy and 1978GS1000custom just to name a few. Try sending them a PM, I'm sure they would help out.

              Comment


                #8
                I noticed that they are all up north. It always seems to endup like that with forums. The FullSizeBronco and FordSix forums are the same way, Ohioans are all up north somewhere.

                What brick and mortar stores would have a service manual? I'm really strapped for cash which is the main reason for getting this bike running (before I mod it within the next 10 years). I'm trying to gather parts for my truck (8-lug and solid axle swaps and starting on the engine build this winter) at the same time that I am trying to get the bike in safe, working order.

                Got new ignition coils to replace the fried set (only one really fried), found one new Bosch Platinum plug for the bike that was suppose to go in with the last plug change that my brother did when he still had the bike, but he couldn't get one of the old ones out. Also waiting on parts to be shipped from another member on here, everything in my sig aside from the MC.

                I do like that 2 new tires for this bike cost less than one new tire for my truck

                Comment


                  #9
                  Try looking here for one online

                  Comment


                    #10
                    I just now realized that I forgot to mention something that was more-than-likely my original problem for not have spark...

                    The conductive tab on the killswitch hasn't been there since my brother got the bike, so the killswitch doesn't work. I moved it out of the right hand control unit since it wouldn't stay in place and I found out that somehow it got twisted around and the 2 wires on the killswitch were tangled and touching.

                    Now that I uncrossed the wires, the starter button doesn't work and applying positive current directly to the starter or jumpering the starter relay does not yield any spark.

                    Comment


                      #11
                      You have many differant things going on here tackle 1 at time. Do you have a fully charged battery to begin with ? When you turn on the key do you power to the coils ? Is 1 side of the battery connected to the solenoid, the starter connected to the solenoid ? Is the solenoid case grounded ? It seems to me if you have 2 wires going to the start button they should be connected to make the bike run and disconnected to make it stop thats what a switch would do. Have you checked your fuses ? I would start with these sort things out and then move on. Good luck

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