| Author |
Message |
    
Brandon_m
| | Posted on Tuesday, May 12, 2009 - 02:00 am: | 
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Was out for a sunday ride on my '04 XB12R with fellow Bueller Bob_Thompson. We were out for a few hours through different road conditions. Anyway.... had to push it pretty hard to keep up with his 1125 when he got on it up the hills. So the last hour of the ride was making the bolt flex a bit. Parked it for about 2 hours and then started home. Warmed up for 3-4 minutes. Jumped on and got about 3 houses down the road when the front cylinder quit firing. Limped home, let it cool and checked the plugs.
Front one was a little dark but not bad. Cleaned it up and put it back in just to see if I had resolved the problem. Front still would not fire. Pulled the plug again and checked for spark. Good there. Next I pulled the injectors. Cleaned them up then and cranked the bike with the injectors out of the bike to check the spray. They both looked the same. Reinstalled but still wouldn't fire. I swapped the injectors but still nothing. I even switched injector harness plugs. Back cylinder fired with the front plug on it.
So I have spark and fuel to BOTH cylinders. Besides trading up for the 1125R, what can I do? |
Id073897
| | Posted on Tuesday, May 12, 2009 - 03:46 am: |
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let it cool and checked the plugs.
Front one was a little dark but not bad.
That's surprising. I would have expected the front one looking completely soaked. |
Brandon_m
| | Posted on Tuesday, May 12, 2009 - 09:42 am: |
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Why? |
Id073897
| | Posted on Tuesday, May 12, 2009 - 01:08 pm: |
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Because spark plugs look like this if a cylinder is not firing. Where should all the fuel disappear? |
Brandon_m
| | Posted on Tuesday, May 12, 2009 - 08:27 pm: |
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It sat for several hours. It wasn't immediate. I understand what you're saying but in this particular case they were pretty dry, not soaked.
(Message edited by Brandon_m on May 12, 2009) |
Sparky
| | Posted on Tuesday, May 12, 2009 - 11:53 pm: |
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You might try installing new spark plug cables. Quite possibly the front one might be damaged or maybe was not installed properly, leading to a misfire situation.
I'd install new spark plugs just to remove any doubt that the old plug tip might have a piece of debris that can cause an insidious high voltage shorting situation at the insulator tip. Cleaning spark plugs can often make things worse unless one uses a plug sand blaster which is only good enough to get the machine running again for a trip to the dealer's parts dept, IMHO.
(Message edited by sparky on May 13, 2009) |
Kalali
| | Posted on Thursday, May 14, 2009 - 10:07 am: |
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+2 on the plug wire. A faulty wire could work in certain angles and fail in other angles.
They are cheap. |
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Front cylinder cold!!!