cbr600f-n starting issues
 

hi all,new to cbr forums so i apolagise ahead if i post in the wrong place.
right ive recently bought a k plate cbr600f.bought as a project as it was left outside for six months and the mot has recently ran out.it still has 6 months tax tho.when i first saw the bike it didnt want to start as the battery was low,we charged it up and got it fired up,after a little warm i took it for a ride,it seemed to be hesitating quite a lot in the lower revs,but when it hits around 5 thou it doesnt do it,it sort of fires into life and flies,plus i noticed a bit of light coloured smoke comming from the exhaust,plus the front wheel seems to be turning in when im leaning.[could a slightly rumbling bearing cause that?]and the choke was really stiff and wouldnt relese by itself
ended up paying 500 notes fir it.
the next day the battery was completly dead and wouldnt hold a charge so i couldnt start it.decided to give it a good look over while waiting for a new battery.
so checked all air box/filter/pipes,no splits or leaks that i could see it was clean but did notice a k,n filter in there
checked over the carbs,nothing seems blocked and theres defo petrol getting thru.[i can smell it around the exhaust when turning over]
gave off a preety big bang aswell.
got new battery on and still she wont fire.
pulled out no 1 plug and it was stinking black,checked the spark and was very weak.[it was an iridium plug]
so i was going to buy a new set of plugs and go from there.
i did tip a bitt of petrol straight to the carb but still didnt fire.
the exhaust is new,it says simiprofessianal on it,not sure if its a performance exhaust.im starting to think that if the previous owner had a k,n filter,exhaust and iridium pluggs put in.mabey he didnt jet/sync the carbs afterwards,[if they needed it]would that cause any of the the symptoms ive discribed?
sorry for the long story,thought if i could give a warts and all description it may help with resolving any of the above issues.
any help/advice/critisim all welcome and apreciated

knobs
 

thanx all for all the replys and help,much apreciated.think ill be closing down my account as this site is crap.nobody wants to help anyone just point out the obvious,found a better site with real people who actually try to help others.all the best ****ers.