Whats up guys. My 2003 AC400 after 6 monthes of sitting was hard to start... obviously. Then the idle was terrible after i got it to run for more then a minute. SO i changed the gas and i turned up the idle and after a hour of idleing I turned the idle down and it now seems to be fine. Is there something that i shoutld do like clean the carb? thanx

 

If the machine is going to sit longer than a couple of weeks you need to put fuel stabilizer in the tank and then run the machine until the carb is full of stabilized fuel. Gas goes bad very fast now adays.

 

Bear is right - next time you know it's going to sit - add some gas stabilizer. For now, I'd drain your carbs, (even all your gas) and add SeaFoam to your tank. Next, I'd change your spark plug. Last, I'd stop messing with idle adjustment. You really should have a tach for that. AC400's are supposed to idle at a specific rate. Without a tach, it's hard to measure that rate. You won't waste your machine or anything by messing with it, (not that serious), but it's hard to get it running optimally by ear. Try the SeaFoam and some fresh, fresh gas and change and properly gap your spark plug and change your oil. If that doesn't fix it, then you may be in for a carb tear-down as your jets and floats may be gunked up, but my bet is the suggested steps will work. Good luck...

Mark

 

My 06 500 auto has started up perfectly since i bought it. I have about 250 kms now and it still starts up fine, even -20. When it warms up i'll drive about 10 - 20 feet, stop, then it stalls and is kinda hard to get started back up again. When restarted, it's idleing down to about 1000rpm. I adjusted the idle but doesn't seem to help much. Any thoughts?

 

tnewguy; it starts fine because you run it regularly and keep getting fresh gas in the tank that way. However, with today's high priced trash they are pushing on us, that starts loosing it's potencey after as little as 3 weeks, 6 months is a eon and without a fuel stablizer, the gas is flat and on top of that the alcohol in the gas sucks moisture out of the air, into your tank to make things even worse.

 

Well, I'll try adding some stabalizer and see how that works out. With it being winter now, It's safe to say that the bike will sit for longer periods of time before usage

 

One more question bear. I noticed that there is a black hose that goes under the top part of the front of the frame. It looks as if has been melted, and it is now sealed at the end. I was thinkin maybe that it was the battery vent hose...........or could it be for the gas tank. If it's for the tank, thats probably the source of my problem right?

 

By the way, how much fuel stabalizer do i put. have half a tank, 350ml bottle of stabalizer and the bottle don't say how much

 

You need to follow the hose and tell where both ends go. A sealed hose is serving no purpose and can cause problems. With the hose is up front I would douby it is the battery vent, but it could be a fuel tank vent or any number of other hoses. Yes, it could be your problem. I've seen some very weird tank vent problems over the years. When you get the stabilizer it will have instructions on the container as to how much to use, I always error to the side of to much stabilizer.