At Wits End with This - Honda Shadow Forums : Shadow Motorcycle Forum
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post #1 of 89 (permalink) Old 10-26-2016, 10:16 AM Thread Starter
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At Wits End with This

I have an 05 Shadow Aero and on my way home two weeks ago, my bike took a crap. I had a sudden loss of power on the freeway and had my throttle fully open and was barely making 60mph. I have spent the last two weeks troubleshooting and I am running out of ideas and need some help. I have gone over the carb twice fully disassembling it, drained the tank and refilled with fresh gas, checked and switched the coils, replaced the plugs, checked for spark.

My front cylinder is not firing and I have no idea why. I have noticed a short while before this happened that when I went to start my bike, it dumped some fuel, and was getting harder to start. I may need to mention that I have removed most of my baffles a few months ago. Any feedback would be appreciated.


05 Shadow Aero - Her Name is "Nao"

78 CB750K - deceased
81 Kawasaki KZ750 - deceased

04 Shadow Aero - Passed Along

Last edited by vabrokenarrow; 10-26-2016 at 10:18 AM.
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post #2 of 89 (permalink) Old 10-26-2016, 10:47 AM
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Have you checked your Petcock?


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post #3 of 89 (permalink) Old 10-26-2016, 11:29 AM
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When something happens after you've done some recent work, go back over what you have previously done to check it. If you had spark before the work and no spark after the work, likely something simple, plug wire not making contact etc.
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post #4 of 89 (permalink) Old 10-26-2016, 11:42 AM Thread Starter
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I have checked the petcock and it is functioning. My rear cylinder operates fine; just the front cylinder. I double check everything each time. I get a gurgling sound (best way I can describe it), when the bike idols. I tried to connect a compression tester to the cylinders as well in order to compare. There is no change in operation when I remove a front plug, but since only my rear cylinder is working, my engine cuts off when I pull a rear plug.

05 Shadow Aero - Her Name is "Nao"

78 CB750K - deceased
81 Kawasaki KZ750 - deceased

04 Shadow Aero - Passed Along
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post #5 of 89 (permalink) Old 10-26-2016, 12:01 PM
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Spark plugs @ $2.50 ea. would be where I would start.







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post #6 of 89 (permalink) Old 10-26-2016, 12:15 PM
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I had an old Virago 920 that was doing that intermittently until, after a while, it wasn't intermittent any more. Turned out to be the CDI.

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post #7 of 89 (permalink) Old 10-26-2016, 12:27 PM Thread Starter
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Quote:
Originally Posted by h13man View Post
Spark plugs @ $2.50 ea. would be where I would start.
h13man, as mentioned, that was one of the first things I did.

05 Shadow Aero - Her Name is "Nao"

78 CB750K - deceased
81 Kawasaki KZ750 - deceased

04 Shadow Aero - Passed Along
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post #8 of 89 (permalink) Old 10-26-2016, 12:30 PM Thread Starter
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Quote:
Originally Posted by Hawk View Post
I had an old Virago 920 that was doing that intermittently until, after a while, it wasn't intermittent any more. Turned out to be the CDI.
The cheapest (CDI), (ECM) I can find is $100.00 and it would have to be shipped. I have considered this option, but there is no way that I have come across to test mine to see if it actually the problem. I don't want to buy one and wait for it to be shipped if that isn't the problem.

05 Shadow Aero - Her Name is "Nao"

78 CB750K - deceased
81 Kawasaki KZ750 - deceased

04 Shadow Aero - Passed Along
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post #9 of 89 (permalink) Old 10-26-2016, 01:23 PM
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You said that front cylinder is not firing. Does it have spark? When you switched coils did you also switch plug wires?
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post #10 of 89 (permalink) Old 10-26-2016, 01:38 PM Thread Starter
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Quote:
Originally Posted by jpr1968 View Post
You said that front cylinder is not firing. Does it have spark? When you switched coils did you also switch plug wires?
jpr1968, I removed each coil and checked the ohms and placed them on the opposite from where they were originally mounted. The wires were set by length to which cylinder, coil, and placement they were intended for. I did check for spark afterwards on each wire after re-installation. After checking for wire spark, I checked the front plugs for spark again. I am running out of guesses. I can't afford to take it to a shop and have my motor overhauled so I am trying everything else and reserving that as a last resort.


05 Shadow Aero - Her Name is "Nao"

78 CB750K - deceased
81 Kawasaki KZ750 - deceased

04 Shadow Aero - Passed Along
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