2005 burgman 400 low speed studer

I have a 2006 that I purchased with only 2 miles on it. Now that it has about 2600 miles on it I also notice a low speed stutter . I have put injection cleaner in it off and on since I put chased it. Sometimes that works. Other times it does not. I have asked others on this forum for suggestions. I think it has to do with the old fuel, which I had the dealer drain before I rode it. Howe er, since the bike had been started and idled before I actually rode it, I think the bad gas left the injectors coated with something. It may just take awhile for the stuff to finally get cleaned out of the system. I have asked the shop about it and the only solution they can think of is to put the injector cleaner in every time I fill up till it clears it. They did pull my plug, though it sometimes feels like it is missing a beat still. Sorry I can't be of more help.

Fuel injectors are a closed system - open only to the gas supply from the fuel pump so there isn't any evaporation happening - the bane of a carburated system. Deposits do happen in injectors but on on the scale of a carb. I'd look at the plug wire where it comes out of the coil making sure it is seated well - and there is no moisture under the boot. Not an uncommon thing in high humidity areas. Its interesting that its more common for motors to stumble under heavy loads than a light load. Maybe the air flow sensor is sticking (do they have these?). The answer is probably an easy fix - it usually is - and quite often seems to be from something that doesn't seem to be directly related. One of my hobbies is air cooled VWs - specifically my 71 Karmann Ghia. A problem and the cause are quite often puzzling.

Mel46 said:

Scootereno, you'll have to show me where that is and how to clean it. Do you take it off or just spray it with cleaner?

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Any time Mel. It is under the plastic cover under the seat beside the air filter.
You do have to take the adjustment screw out to clean it and there is a tiny phillips head screw that needs to be removed first. It is a "keeper" screw to keep the adjustment screw in place more or less. To keep the idle adjustment screw in adjustment after cleaning: Count the number of turns to carefully screw it all the way tight and write it down so you can put it back very close to where it started out. Then remove it and clean it with throttle body spray cleaner and the chamber the screw goes in. It may be hard to start the first time with the excess of cleaner in the system but it will also help clear out the injectors too. Let it idle and fine tune your low end idle rpms. After the first time it take about 10 minutes.

Well, I'm back from vacation. We decided to take the scooters out for a long ride to give them some exercise. When we were on our way home after going about 60 miles, we stopped at a light and my scooter was idling really rough. I looked at the tac and it was hardly registering. I was down to close to 1/4 of a tank so we filled up at a local station. When I started it after the fill up it idled perfectly. I know that the dealer had charged me to get all of the old gas out and I have filled this tank multiple times since I bought it, so this puzzles me. Any suggestions, Scootereno? If it is the idle adjustment it would have always been rough, wouldn't it, not just when the fuel gets low? I am pretty sure that it has something to do with all the old fluids that sat in it for 6 years, but the dealer assured me that they had changed out all of that and run fuel stabilizer through it.

Well we have been riding since around 9:30 this morning and it is above 90 outside right now. First I loaded one of my dogs in a crate and took her about 40 miles up the road to the vet for annual shots. Then we loaded one of our other dogs in the crate and took off to a Starbucks for some cool drinks. Our 3rd dog doesn't want anything to do with the scooters. I thought all Jack Russell's loved danger, but Katie is the exception. She is the kind that would love nothing more than to lay around all day in the air conditioning and have someone rub her tummy ever so often. Who spoils whom!? As for the scooter, it started up the same as the other day. The idle was rough and it would catch just before quitting. But after it ran for a few minutes it idled correctly. Since I don't have time to take the bike apart and clean out the tank right now, I am about to hear to Wally World for some Seafoam. Hopefully this will help until I get a chance to do something better. My list is starting to grow for that bike. I have all sorts of tail box lights I have to connect to the bike too. I think I can get to the wires if I remove the lower back panel.