Dropped bike and now it runs poorly - Steve Saunders Goldwing Forums

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post #1 of 19 (permalink) Old 09-10-2019, 07:26 PM Thread Starter
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Location: Valparaiso, IN, USA
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Dropped bike and now it runs poorly

As the title states, I went to stand the bike on the side stand and didn't realize it was pulled up, talk about a DUH! moment. Anyway, I noticed it was running a little odd, like the carbs were flooded or something and there was a slight bog. I didn't think too much about it since it was early morning and when it fell over, it was still running until I shut it off. It rode fine after a couple of miles. On my ride home, it seemed to still be acting up again. When I got home, it idled around 500 rpm, has a rattling sound from the timing belt area that goes away when I pull in the clutch and the exhaust smells maybe rich. Timing belts are new last year by the way. If I roll on the throttle, I can hear maybe some pinging and the exhaust note "could" be different than normal. I also noticed when I pulled it in the garage, having it on the center stand and idling, it would simply shut off, no sputtering or anything, as if the key were turned off. It does seem that it behaves a lot like it did last fall when I had a vacuum leak, the one hose between the throttle throats.

I feel real stupid about laying it down and am not in the mood to tear into it tonight. I thought maybe someone could add some insight into what I'm experiencing. I'm not sure if there are some knock sensors or something similar on the engine. The rattling sound however does concern me more than anything else.

If it makes any difference, when it fell over I was parallel to my garage door and the bike landed on the left side, with the slope of the driveway, it actually heeled over past the roll bars and landed on the mirror. I'm concerned that the impact may have done something to the engine although there are no leaks anywhere. I have floor boards which did fold up into the shifter but it shifted fine all during my 60 mile commute. Any thoughts or comments about the bike, not my stupidity, would be appreciated.

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post #2 of 19 (permalink) Old 09-10-2019, 08:18 PM
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I would check for a fouled plug first

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post #3 of 19 (permalink) Old 09-10-2019, 08:22 PM
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Quote:
Originally Posted by fibersport View Post
As the title states, I went to stand the bike on the side stand and didn't realize it was pulled up, talk about a DUH! moment. Anyway, I noticed it was running a little odd, like the carbs were flooded or something and there was a slight bog. I didn't think too much about it since it was early morning and when it fell over, it was still running until I shut it off. It rode fine after a couple of miles. On my ride home, it seemed to still be acting up again. When I got home, it idled around 500 rpm, has a rattling sound from the timing belt area that goes away when I pull in the clutch and the exhaust smells maybe rich. Timing belts are new last year by the way. If I roll on the throttle, I can hear maybe some pinging and the exhaust note "could" be different than normal. I also noticed when I pulled it in the garage, having it on the center stand and idling, it would simply shut off, no sputtering or anything, as if the key were turned off. It does seem that it behaves a lot like it did last fall when I had a vacuum leak, the one hose between the throttle throats.b

I feel real stupid about laying it down and am not in the mood to tear into it tonight. I thought maybe someone could add some insight into what I'm experiencing. I'm not sure if there are some knock sensors or something similar on the engine. The rattling sound however does concern me more than anything else.

If it makes any difference, when it fell over I was parallel to my garage door and the bike landed on the left side, with the slope of the driveway, it actually heeled over past the roll bars and landed on the mirror. I'm concerned that the impact may have done something to the engine although there are no leaks anywhere. I have floor boards which did fold up into the shifter but it shifted fine all during my 60 mile commute. Any thoughts or comments about the bike, not my stupidity, would be appreciated.
First there is no reason the bike was still running when it was tipped over that much. The bank angle sensor should have turned off the engine long before that. That is not the issue but something you should check in to at some point. The bank angle sensor is not doing it's job.
As for the poor running I think maybe you already touched on a possible issue. When the bike went over it could have jarred a line loose. It also might have jarred the carbs enough that they moved on the rubber isolators. Either way I wonder if you are not going to be chasing a vacuum leak. Do you use propane to find vacuum leaks?
Another possibility is that it might have broken off a spark plug on that side. Pulled off a plug wire a little or pulled a plug wire apart.
The rattle is probably not an issue. It is probably the gears in the transmission rattling because the output from the engine is erratic.
If it makes you feel any better I did the exact same thing. I tipped mine over at Taco Bell. So all the customers got a meal and a show for the cost of the meal.
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Mike

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post #4 of 19 (permalink) Old 09-10-2019, 08:49 PM
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You didn't say the model year

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post #5 of 19 (permalink) Old 09-11-2019, 12:21 AM
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Originally Posted by Sprocketrocket55 View Post
You didn't say the model year
His profile and signature both say he has a 1990 GL15.

Why ain't we ridin'?
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post #6 of 19 (permalink) Old 09-11-2019, 04:46 AM
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The bank angle sensor should have killed the engine, investigate why it is not working.
Sounds like it took a good jolt going down. Low idle RPM, different exhaust sound and smell confirms something is not right with ignition or more likely mixture. After a visual inspection of components strip it down a bit and diagnose the problem.
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post #7 of 19 (permalink) Old 09-11-2019, 06:32 AM
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With the engine running on its side - Wondering if maybe a stuck carburetor float....

Try this: Disconnect fuel pump power at the tank, disconnect and plug vacuum line at the petcock, start engine and run the carburetors out of gas.. Use the choke when engine starts to sputter to use the last of the fuel in the bottom of the carbs. After it dies, reconnect vacuum line and fuel pump.

This exercise "Should" drop the floats to bottom of travel and maybe restore normal operation if one was stuck.
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post #8 of 19 (permalink) Old 09-11-2019, 06:40 AM
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There was a recall for the Bank Angle Sensor (BAS) for the 1988 - 1993. One possibility why yours did not work.

The BAS provides a "ground" to activate the ignition relay....!

Technicians were supposed to stamp an "X" on the frame (near the battery) when completing the recall.


In your post........................

I pulled it in the garage, having it on the center stand and idling, it would simply shut off, no sputtering or anything, as if the key were turned off.

You might want to investigate the BAS situation.......Maybe even first.

Don't "overthink" the issue....!!
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post #9 of 19 (permalink) Old 09-11-2019, 09:27 PM Thread Starter
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Thank you to all, very good things to check. I hate to admit but this is not the first time I've dropped the bike however the other time it did shut off, so looking into the sensor needs to be a priority. Haven't had any time to really look into things, hopefully over the weekend as we are having some great riding weather.
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post #10 of 19 (permalink) Old 09-12-2019, 12:05 AM
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Quote:
Originally Posted by fibersport View Post
Thank you to all, very good things to check. I hate to admit but this is not the first time I've dropped the bike however the other time it did shut off, so looking into the sensor needs to be a priority. Haven't had any time to really look into things, hopefully over the weekend as we are having some great riding weather.
Remember the old saying. There are two kinds of bikers. Those who have dropped their bike and those that will.

Mike

Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.
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