What's wrong with my fazer 600?

I have a yamaha fazer FZS 600 on an 98 R reg. over the past few days my fazer has been cutting out when i'm riding it only for about half a second but then starts again i thought it was missing, so i changed the plugs but that didn't work and now i think it could be a wiring problem but i really dont know. i've stoppped riding it until i find out what it is. i can replace any part on this fazer. but i dont know whats wrong with it, if i know i can sort it out. its like a missing but its more like as if you're switching the engine cut off switch on and off while riding... it also does it when its stood and you just hold some revs on and it does it then.. please help me with some good advise. its just that i havent got loads of money to spend on it, in a bike repair shop so i need advise.

all the classic signs of crap in the float bowls.......just drain the carbs via the float bowl drain screws and it should be fine.

The bike will idle because the bike is running on the idle jets which probably are not blocked, when you rev the bike sucks through the main jets which sound like they have crap in them.

Could it be a blocked fuel filter maybe?Sounds like it could be starved of fuel,not getting enough when revved but ok at idle? just a thought

Check the side stand switch, just a hunch.

Kill switch could be faulty or damp,also check wiring round the headstock.

I would you check out the vacuum line from intake manifold to fuel petcock. Sometime the line broke or bind. It cannot open the fuel to carb. Turn petcock on "prime" to see if working. or you got low on gas. Turn petcock on "res" or need more gas.
I am wonder if you turn the steering wheel. Does it cut off engine?? It might be loose connection wires inside headlight. I need more specific when it quit. When you put in gear then quit?? or release clutch then quit??
It might be safety issue problems.
you need to use ohm meter to check out the kick stand switch. clutch lever switch and neutral to see if it working operator. ( make sure when you pull in and out, see ohm will change. If not then replace. )
Good luck.

will it idle for say 10 -15 min no problem, can you blip throtel no prob, if its just when throtel on for sustained period could be crap or water in fuel,
are battery leads tight & all conections from geni -reg-ignition clean & pushed in ok, look for the green festering wire's

Almost certainly a loose connection or broken wire that intermittently disconnects. Could be sidestand. I had exactly the same thing on my FZS1000, so I inspected the wiring and found the problem after about 5 minutes. It was a connector under the left hand side unser seat cover. It had vibrated loose. Just pushed it firmly back together and the problem was solved.

First thing I would do is inspect all the wiring, then use a multimeter, but the difficulty is with the intermittent nature, a multimeter will only show the problem when the problem arises, which is unpredictable, and probably vibration related.

Start with the battery connections, are they secure?
Then the ECU connector, is it firmly connected and are all the wires connected to it firmly?
Then work your way around bike checking the connectors.

I agree with rooks hunch...side stand switch used to make my GSXR cut out...I would not of thought it would be to do with the cut off switch, but its possible that is faulty. Iwould take it to a local bike mechanic so he can have a look. most are approachable and wont mind telling you what the problem is, just pop down on a sat morn or something (if the bike will get you there).... doesnt mean he expects you to fork out money. My local mechanic was very good....theres a few of them still around if you look in yellow pages etc, hopefully