Backfiring periodically on decel/ CO issue again

DarkMonster620 · April 25, 2009, 06:06:03 PM

Hey,

Got a M620D, opentop air filter, Hi mount Termis.... Couple of miles into 'inaugural' ride, let throttle go to slow down "POP POP POPPUM"...for behind and from inside airbox, this was Saturday afternoon, so had to wait till Monday...Got to shop on Monday, DSS hooked, Trim showed 20, Saturday it had shown 24...so up it was...two weeks later, the same, using 95oct gas,

will waiting, mechanic too small to ride, so I have to test ride....20mins later, all OK...Stop bike for more than 5 days[due to weather or health], starts doing it again...trim goes down by itself...

Bike has a mind of its own...But it has lots of

that after ridin for a full morning, makes me come home and

a cold one while I wash, with lots of detail my baby.

fouramdesigns · April 27, 2009, 02:02:49 PM

Carlos, are you drinking a cold one now buddy, as you type this? Cause I could only pull a bit, albeit a VERY small bit from your post.

DarkMonster620 · April 29, 2009, 12:51:41 PM

Quote from: fouramdesigns on April 27, 2009, 02:02:49 PM
Carlos, are you drinking a cold one now buddy, as you type this? Cause I could only pull a bit, albeit a VERY small bit from your post.

Do I need a cold one now?.YES!!!!!!!! Temp is 95F with humidity at 98%....

What I was trying to say was: had hierf filter and Termi exhaust installed, DSS hooked up, everything check OK, Later that afternoon, bout 100miles into the ride, POP POP POPPUM while coming to a stop...Back to the shop, TRIM adjustd back to 24[as it was on Sat], it showed it was on 20...

This happens so often, that when Italian [moto] Doctor came for 'free' clinic, he was

is this happening. I just try lo live with it...and if takes to much of my bike, I ride to the shop, adjust trim and ride away at no costo...

fouramdesigns · April 30, 2009, 08:56:33 AM

Ah, now I get it, slightly better.lol

Ok, bike checked out fine, was a fuel mixture issue, CO corrected that. An the chain was loose since it was just replaced, they say she's running like fire. So ready to pick it up.

DarkMonster620 · April 30, 2009, 03:43:54 PM

Quote from: fouramdesigns on April 30, 2009, 08:56:33 AM
Ah, now I get it, slightly better.lol

Ok, bike checked out fine, was a fuel mixture issue, CO corrected that. An the chain was loose since it was just replaced, they say she's running like fire. So ready to pick it up.

Chain was not loose, the trim[at least that's what's called in the DSS] was of spec, too low, but yes, fuel issue. Now she's not running at all, go to my flckr site and see pics of accident...

fouramdesigns · May 27, 2009, 05:49:30 AM

Bike is running lean again, power is almost nothing, pulled very sluggish this morning on the freeway. Just had the CO/throttle bodies synched a few weeks back. I'm ordering the correct iridium plugs today to see if that helps any. Also I ran out of fuel on Friday in hurry to get home to leave for the beach, any chance this could cause another CO issue? I think in this or one of the other related post someone mentioned a water sensor etc that could be causing the CO to keep changing.

fouramdesigns · May 27, 2009, 04:52:58 PM

Update:
Noticed on the ride home, the bike is lurching. In the first 3 gears, and between 3K-6K RPM's, it sputters. The sound of the exhaust has changed, as well as the sound of the short box/throttle bodies. Almost no pick up or power. This thing is sick, sick. Any ideas?

Speeddog · May 27, 2009, 05:31:20 PM

I'd say swap out the fuel filter.

Also, a possibility that the pressurized fuel lines in the tank are going bad.

I've seen both issues cause weird behavior like that.

fouramdesigns · May 28, 2009, 06:15:46 AM

Quote from: Speeddog on May 27, 2009, 05:31:20 PM
I'd say swap out the fuel filter.

Also, a possibility that the pressurized fuel lines in the tank are going bad.

I've seen both issues cause weird behavior like that.

Thanks for the reply as always. Are the pressurized lines replaceable? I assume that they are.

Speeddog · May 28, 2009, 10:09:52 AM

Yep, they're what appears to be regular fuel line.

fouramdesigns · May 31, 2009, 12:23:02 PM

Starting the work today, about to pump the tank and pull what I can. You've been a big help as with the others. I called the original Duc shop I've been using to get a few parts, mentioned the board and all the help, guy caught a tude like I was an idiot for getting help via the net. Had him transfer me to the Service, told the manager that the CO/ful issue has crept back up, "man, there's something wrong with that bike, how do you know it's the CO again?" I told him same symptoms as before. I've spent almost $1500 with this dealer, and thy treat my like a second class citizen. I'm sorry I can't afford to buy a new Duc at the moment. I have an appointment scheduled with Corse Motorsports in a few weeks, Alain the owner, was in a very bad wreck with his wife, so he's out indefinitely, so I'm doing what I can at the moment till I can get the bike to his shop. You know, I've been in sales 14 years, and I treat the small sales just like the big sales, one reason I've been so successful. Blows my mind how this other shop can just blow me off like I'm some homeless bum pest. I've been nothing but courteous and patient. Anyway, thank you for all of your help, I'll be asking for more as I go along. Wish me luck....

Spencer

DarkMonster620 · June 01, 2009, 05:46:22 PM

Quote from: fouramdesigns on May 27, 2009, 04:52:58 PM
lurching first 3 gears between 3K-6K RPM's, it sputters. The sound of the exhaust has changed Almost no pick up or power

Mine has had this same issue since new....

...

Any suggestions? Wty expired last year on June 24th

Now

...

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Backfiring periodically on decel/ CO issue again