Rode bike about a month ago parked in shed went to ride again and no go there is plenty of spark etc tessted all fuses the fuel injection is doing the usual start up sound but shes just not coming to life could it be the pump inside the tank?IS THIS A COMMON PROB?DO U HAVE ANY SUGGESTIONS TO WHAT ELSE IT COULD BE IT IS A 2002 DUCATI MONSTER 900 APPRECIATE ANY FEED BACK CHEERS

check the fuel flow and fuel filter.

sounds like a fuel issue, how long has the bike been sitting? You said it is worse in certain weather conditions, so i don't think electrical would act up in different weather conditions. I am not sure if your bike has carbs or fuel injection. If it has carbs, you most likely have dirty pilot jets.

Try running sea foam through ur system take the gas hose off the tank make a funnel system to that hose fill it with straight sea foam crank the bike untill it sucks at least 1 cup full let it sit for 24 hrs then try to start the bike with gas by adding through the funnel still no luck check spark plug for spark if no spark check sensors a wire could have croded and not making good connection also check your fuse box changing fuel pump could have blowen a fuse

Hi The dealership are right but there are ways of dealing with the problem that don't require loads of cash. I had a similar problem with a Suzuki SV some years ago. i researched the problem on the web and spoke to a few bike performance places fuel goes off and causes all manner of problems with fuel injection and carbs.

I cured my problem by get a couple of bottles of injector and carb cleaner for petrol.engines you simply pour it into the tank and ride. I used Comma Petrol Magic (about £6 here in the UK) filled to nearly full tank poured the contents of 1 bottle into the tank and rode around after a few miles and a few small backfires I found the bike was performing much better and idle was nearly normal. I use this product every couple of months (normally ½ a bottle to a full tank) bike rides great. Hope this helps.

Wasted spark system. If fuel and electrical is all good/correct it is often the case in these symptoms that motor cycle spark plugs that although looking good and firing outside of the engine are breaking down and will not fire under compression pressures on a power stroke but will fire unburned fuel on the unpressurized exhaust stroke when the plug again fires in a wasted spark ignition system and when so firing the result is a backfire, usually quite loud.

charging system needs to be checked. runs good till the battery looses power then the bike starts loosing spark and or fuel injection starts to fail

This bike is so. What can we do?

I don't know a lot about the Twin Cam powered machines but if your bike is equipped with a carburetor, check the fuel petcock. In 1996 Harley went to a vacuum operated fuel petcock and they do give problems. You'll have plenty of fuel in your tank but not a drop in your float bowl. There is a diaphragm in the backside of the petcock that will get a hole in it and shut off the fuel or the vacuum hose might have come loose. If your bike is fuel injected, I'm afraid that I don't have any suggestions since I've never messed with fuel injected models.

Good Luck
Steve

hi,i am not overly familiar with these but it sounds very much to me like a carb problem.and very likely a carb balance problem(if the bike has carbs),the problem being that as the linkages and internal parts of the carb wears the carbs will be getting an imbalanced fuel and air load,its takes very little for the carbs to go out of sync,but when they do it will cause erratic running particularly at idle,or when as is your case coming down off the throttle to an idle,there will be isufficent mixture or fuel in the system to let the bike keep running,carb imbalance normally affects the slow speed circuit in the carbs more noticeably because of the low rpm,not so noticeable at high rpm as the carbs are getting plenty of fuel.If the bike is injected then it maybe that the butterflys in the throttle bodies have suffered the same fate,the linkages may have worn slightly allowing an imbalance to occur,or if injected(again)the fuel injection may need remapping,.road conditions are very hard to replicate in a workshop environment and your problem seems to go away once the mechanic touches the bike(its almost like the bike knows it is at the doctors),i would put my guess on the carbs being out of sync,get the dealer to put a set of gauges on it and see what happens,the adjustment only has to be out by 1/64 of a turn to be wrong...hope this helps..let me know how you get on...cheers..ian

first thing to do is to check fuel level. you mentioned about 290 miles since you owned it but no fillups. did you get gas from same store? not unusual to pickup trash or water in fuel from conv. stores. with that out of the way, look at your plugs and see what they look like. black and sooty would be fuel fouled and very white or very light tan would be lean. if plugs and fuel are eliminated, it could be the result of a stator coil starting to go south. these will require special tools to diagnose.