I think a spark plug fell out - Honda Motorcycles - FireBlades.org
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post #1 of 16 Old 09-21-2006, 10:29 AM Thread Starter
 
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I think a spark plug fell out

So, this is crazy:
I was riding home from work yesterday afternoon. Normal day, normal ride. All of the sudden, I get a loss of power and the engine starts making a popping sound just like a v-twin with the exhaust removed. It was still running and I didn't have any indicators on the cluster. Even the temperature was the same. Actually I think that it might have been a little cooler than normal. So I basically coasted the last few blocks home.
When I got off the bike, I could still hear the popping noise and it was idling about 200 rpm lower than normal, but still smoothly. I looked under the tank from the side and something was flapping in time with the noise. After hitting the kill switch, it looked like the spark plug wire was flapping. I hope that I didn't lose an ignition coil.
I don't have any time to work on this until Saturday, so I am cage-ridden until then.

Has this happened to anyone else?

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post #2 of 16 Old 09-21-2006, 10:54 AM
 
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Re: I think a spark plug fell out

hope you didn't blow a plug out and pull the threads out with it. if you're lucky, maybe the plug just wasn't torqued properly and came loose. Good luck.
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post #3 of 16 Old 09-21-2006, 12:26 PM
 
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Re: I think a spark plug fell out

I had something like that happen to my GS 550 but, it was between rides. Mine, was a neighbor in the apartment building who didn't appreciate my bike and removed 1 plug. But nothing happened to his car.

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post #4 of 16 Old 09-21-2006, 12:34 PM
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Re: I think a spark plug fell out

Did you recently change the plugs? Sounds like your plug did blow out, and most likely took the threads with it. Check the Similar Threads listed at the bottom of this page for posts from others who had the same problem.

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post #5 of 16 Old 09-23-2006, 3:28 AM
 
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Re: I think a spark plug fell out

Wow! Seems like this becoming a known issue with the 929's. Same thing happened to me. I was able to tighten the plug down the first time, 200 hundred miles later it happened again. I wasn't so lucky the third time. The threads were stripped. I took it to the dealer and the suggusted replacing the head with was about $2000 parts and labor. Turns out they were able to remove the head and sent it out to a machine shop. Everything has been good since. Good luck.
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post #6 of 16 Old 09-23-2006, 10:02 AM
 
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Re: I think a spark plug fell out

i had my stand .. exhaust.. centre stand.. swing arm bolt..fairing panel..footpeg..front brake lever..rear brake arm..chain..wheel nut...all fell off at somr stage in my riding life
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post #7 of 16 Old 09-24-2006, 10:59 PM Thread Starter
 
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Re: I think a spark plug fell out

It was weird, I just got in there and pulled it out with my hand. The plug was clean, no threads or metal chunks <whew>. So I just put it back in and checked the other three. Everything works great. It just seems pretty bizzare for that to happen to me. I guess its just me

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post #8 of 16 Old 10-16-2010, 10:30 PM
 
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Re: I think a spark plug fell out

This just happnened to me too! Outta no where. Fortunately I was close to a Honda dealer nd they told me tha same thing, "probly a spark plug, from tha sound of it." from wut I've read on here, it sounds like tha exact same problem. Gotta wait till tuesday
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post #9 of 16 Old 10-17-2010, 12:47 AM
 
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Re: I think a spark plug fell out

Crazy right? Its happened to me twice and I always properly tighten them down.
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post #10 of 16 Old 10-17-2010, 1:22 AM
 
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Re: I think a spark plug fell out

lol I never know when my spark plugs are tight enough.. I still havent had any issues though
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post #11 of 16 Old 04-22-2012, 3:10 PM
 
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Re: I think a spark plug fell out

Quote:
Originally Posted by gliberios View Post
Wow! Seems like this becoming a known issue with the 929's. Same thing happened to me. I was able to tighten the plug down the first time, 200 hundred miles later it happened again. I wasn't so lucky the third time. The threads were stripped. I took it to the dealer and the suggusted replacing the head with was about $2000 parts and labor. Turns out they were able to remove the head and sent it out to a machine shop. Everything has been good since. Good luck.
The exact same thing happened to me aswell a couple of days ago on my 2000 929, does anyone know whether you're meant to use some sort of threadlock -maybe a low strength - with the spark plugs? I generally just torque them and its been fine untill now...
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post #12 of 16 Old 04-22-2012, 4:14 PM
 
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Re: I think a spark plug fell out

I'd steer away from threadlock on plugs. The only thing to put on the plug's threads is an anti-seize "lubricant".

If the bike isn't braking properly, you don't start by rebuilding the engine.
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post #13 of 16 Old 04-22-2012, 4:46 PM
 
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Re: I think a spark plug fell out

does this happen if the plugs are properly torqued down?
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post #14 of 16 Old 04-22-2012, 7:39 PM
 
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Re: I think a spark plug fell out

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Originally Posted by hwap View Post
does this happen if the plugs are properly torqued down?
Mine were properly torqued and it happened to me, and theyd been in for nearly a year and with about 5 or 6,000 miles on the clock, so yes!
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post #15 of 16 Old 04-22-2012, 9:42 PM
 
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Re: I think a spark plug fell out

So, what brand of plugs are we talking about that are backing out? Is it all brands or just some?
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