| Author |
Message |
    
Dmurphy
| | Posted on Saturday, August 27, 2011 - 12:52 pm: | 
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2004 XB12R - 13k miles. Buell race kit installed at 1k miles. Bike has ran fine since I first bought it in 06. Last week on my way home from work (same ride I always do) and at the top of a high altitude climb, the bike started stumbling at highway speeds (70mph). When I pulled off the highway and stopped at a red light the bike would not idle and I had to hold the throttle open at 2.5k to keep it running. I limped home and found what I thought was a loose spark plug wire on the rear cylinder. I changed the spark plugs and re-installed everything and the bike ran fine. The bike worked fine all week and then yesterday the problem came back. Same place, same deal. I changed the spark plug wires and spark plugs again and the problem still persists. It barely wants to idle and does not respond to throttle application. It just stumbles and spits and then gets going. Any thoughts? The rear cyclinder plug wire is very hard to install but I think I have it on there tight enough. I can't really tell one way or another as you can't see how far down the boot is. Any help is appreciated.
Dale
dalemurphy48@yahoo.com |
Dmurphy
| | Posted on Saturday, August 27, 2011 - 04:08 pm: |
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Looks like it may be the ignition coil. I check the primary and secondary resistance and they were both high (1.4 on primary, 12.5 on secondary). I cleaned the contacts up and the readings were the same. I assume this could be causing the problems. |
Terrys1980
| | Posted on Saturday, August 27, 2011 - 04:18 pm: |
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The coil should be <1 ohm on primary and 5.5-7.5k ohm on secondary. |
Two_seasons
| | Posted on Saturday, August 27, 2011 - 11:02 pm: |
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I'm thinking you need to replace your intake seals.
They are a maintenance item.
Use propane or MAP gas on a long hose and put the hose to either intake seal. This will cause your idle to increase. If it does, your intake seal(s) need to be replaced.
DO NOT use carb cleaner or brake cleaner as it will destroy the rubber. |
Dmurphy
| | Posted on Saturday, September 03, 2011 - 12:16 pm: |
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So I replaced the ignition coil and the problem is still occurring. I also realized that my voltmeter reads 2x the actual resistance as the new ignition coil resistance reading was the same as the one I replaced and then I noticed the dial indicates 2x. Weird how some things just seem difficult. So I am back to ground zero. I tried to do the intake seal test with a propane bottle and did not seem to hear any leaks. Any other thoughts? It almost seems like it is running on one cylinder. It idles low and rough. It does not accelerate anywhere near where it should and when it does it stumbles repeatedly and then just slowing increases engine speed. I really don't want to bring it in to the dealer as the bike just isn't worth that much anymore and I don't want to spend $500 on a $2500 bike just to find out it will be $1500 to repair. |
Dmurphy
| | Posted on Saturday, September 03, 2011 - 12:19 pm: |
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I forgot to mention that there aren't any trouble codes on the machine either. |
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Bumbling, stumbling Buell