hard starting fzr250

well the exup bushes are in still sounds rattly tho but that is while i am trying to start, bike still very hard to start pulled the plugs out and all four were black i,m thinking this may be a problem, headlights are on and fan is wired to run as soon as ignition is turned on could this drain too much from starting? i believe being an import the headlights had to be hardwired, i did get it started after cleaning the plugs but it wouldn't rev, stuck my finger inside exhaust pipe and came out black and sooty, so am i looking at float levels and mixture screws or both, can't get it running to do a float level check while motor is running, and what is the best way to set the float levels, this is really starting to frustrate me now

 

update!! still not starting after a complete carby clean, new bushes in exup valve, plugs taken out one by one and cleaned (new plugs were black from trying to start, too rich) now backfiring thru No 4 carb while trying to start, I'm asking myself, why ???, what have i done?, haven't touched any electrics

 

Yeh m8, checked the firing order all ok, one of the main reasons i did the plugs one by one just so i don't mix up leads, really strange tho i took it for a run last week after i put the bushes in after i got it started ran fine , its got to be the carbs! might post another vid maybe someone can pick something else up, Why 4 carbs???? two would have been better

 

ok just pulled the carbs again slightly adjusted the float levels, new fuel lines from tank to filter to pump to carbs, cleaned and set the plugs,checked the firing order,reassembled it all choke works throttle works (well they move anyway) now when it starts just wants to rev out, hopefully his time it will keep running and only a minor tune up and synchronizing of carbs
tomorrow go for a ride and see what happens, sounding better but won't know til i take it on the road
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no good just took the bike for a run flooding badly fuel running from overflow between 3 & 4 carbs started of well though lol, spent too much time on these carbs will look around for another set i think, it seems to me yamaha owners don't have much of a social life they're too busy fixing their bikes weekend after weekend

 

actually dave am thinking about the O-rings can't get any today but tomorrow i'll put a new set in and see if that helps it's the only other thing, the ones i did have weren't flat O-rings so i'm thinking thats the problem, was running well til it started to flood and petrol started to run from the overflow tube, if things don't come right soon it won't be me smoking it'll be the bike lol

 

well things are looking more promising now, the carbies definitely did need a clean and after adjusting float levels-still flooding so one little thing i overlooked (well 4 things actually) i didn't replace the o-rings on the seats (needle &seats) which i have now done, have been for a couple short rides not too far from home (in case i have to push it back ) and i had no troubles, no flooding no fuel running from overflow tubes, Now, how the hell do you get the airbox to go on properly? In my mind i am trying to think of some way to put two pod filters on but making up the tubes is going to be a problem, i'm even thinking about 4 seperate pod filters but not sure if they make the size, i'll have to take carbs to store and see if they have a size to suit
anyway things are looking more promising, tune and balance the carbs and fingers crossed no more problems for a while
thanx for your help guys

 

Nope not yet another fail still flooding, could the pump go wrong and pump too much fuel i wonder, as of yet haven't tried to run the bike without the petrol pump maybe i should try that, was about 5k from home when i noticed it was flooding so a slow trip home with the fuel tap off then on then off again just so i could ride it home, frustrating