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Discussion Starter · #1 ·
Hello Fellow Duc Lovers,


I need some help here. I've been having problems with a crappy running Duc for about 2 months now. :'( I've tried everything from fresh gas to new plugs, rebuilt the fuel pump, spray cleaned the carbs and still it lets me down. The only thing I can thing of now is to have some carb work done. I'm thinking a good synch job, maybe a new jet kit??? The bike backfire through the exhaust with a flame about 3-4 inches long when I'm revving it up in the garage. The plugs are new, but sometimes appear to be whitish-brown in color upon inspection. Does this mean a lean-running bike?? Is that mixture thing easy to adjust?? Is a new jet kit easy to install?? I hate paying others if the work is simple. Is the DR. out there available to help my Monster???

???
 

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Premium Member
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341 Posts
When was the last time you checked your timing belts?
 
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Discussion Starter · #3 ·
Yeah, I would try a more analytic approach. Was the bike running fine and suddenly started up with these symptoms? If so jets certainly aren't the answer. Whitish-brown plugs are about right in color. The whiter = the leaner running it is; darker = richer. You need to figure out what changed to cause it to backfire, etc. Did one of the timing belts slip and change one of the cylinders' timing? Is it backfiring out of both cylinders or just one? When was it last serviced and what is your current mileage?
 
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Discussion Starter · #4 ·
my old sscr would shoot flames on occasion. I traced it back to the rectifier. Best I could figure, it was firing on one cylinder. That heated up the exhaust enough, that when the dead cylinder dumped fuel back there. boom. Those little spark checker thingies are only a couple bucks at auto zone or where ever. Finger is right on check the timing belts. Eliminate the easy and cheap stuff first. good luck. lets know what went goofy.
 
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Discussion Starter · #5 ·
Thanks fellas,


I've got an appointment with my timing this Saturday. I'll check it out and let ya know.

Nothing really changed significantly. This summer, my bike got ran over in the parking lot at work and it sat for 5 weeks while the tank was redone, the new exhaust came in, and various other items had to be replaced. It ran great for about 2-3 weeks after I got it back together-then----bam, just one day it started running great only part of the time. I've got plenty of spark. I haven't yet checked the timing. I figured if it had jumped time, it probably wouldn't run at all-Or at least run like crap ALL the time. Right now, It'll run great for a day or two, then start sputtering. Or, like last Friday-it ran great in the morning, and then after filling with fuel and grabbing lunch,(about 2 hour break) it crapped on me. That day I had rebuilt the fuel pump with the kit mentioned from Mfg's Supply. At least now, I don't have any bubbles in the fuel line. The bike has 6,400 miles on it. I asked the DUCATI guy at my dealer and said the valve adjustment ay 6k was usually unneccessary. Just put quality oil in and it should be good for a while. He said on the 748's, and 916's it was a must, but on Monsters it was an added expense.

I'll let ya know what i find out.

Thanks Again!!
 
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Discussion Starter · #6 ·
Just wanted to update the status of my Monster for all of you who helped me out. The week of Thanksgiving I got so fed up with the poorply running bike that I decided to forgo the appointment at the dealer and rip into the carbs! I'm glad i did because I was able to get it running great without the added expense of having someone else do it. I took the carbs apart-doused them in carb cleaner and blew out all the jets with compressed air. I then adjusted the float height and started to pray. Well, apparantly the power of prayer, or compressed air, is greater than I imagned. The bike has been running great now for almost a month and I've got confidence in her again!!

Thanks for all your help!!!!
Marcus
 
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