my bike when ridden and stop accelerating   smells of fuel   i cannot see any leeks anywhere and have wiped everywhere with kitchen roll to find damp patches but there are not any any ideas    help                                                                                                                                                                              

is seal around fuel cap ok ?                                                                                                                                                                              

Check your air filter could be spitting fuel back into the airbox                                                                                                                                                                              

Check your carb floats, might be stuck and letting too much petrol through. Other than the smell does it run ok.                                                                                                                                                                             

Knackered seal on petcock?                                                                                                                                                                              

checked fuel tank   all ok bike runs like a dream   exaust is a little sooty   but thats all                                                                                                                                                                              

do the gas test lighted match lol                                                                                                                                                                              

Check for splits / tears in any vacuum / breather hoses.   Make / model / year / engine size / Fuel inj or carb info would help for further diagnosis.                                                                                                                                                                             

kwack kle 400   91 --93  the pilot  screws  seem a long way out to me  i havent touched them but all the others ar well resesed in the housing   these almost show outside the casing   do they increase the fuel flow   or the air   i dont know    i think its a repair kit and borrow someons brain                                                                                                                                                                                 

ps   the exaust is verry sooty    might need a chimny sweep its that bad                                                                                                                                                                              

  Confusing as you say it runs fine ?!?!?!   If the exhaust is as sooty an black as you say, you are DEFF overfueling !!! The smell is caused by the unburned fuel,  Numerous reasons for this - -  so bottom line is remove carbs, strip down, clean an reset, not forgetting to inspect the manifold rubbers. Model specific workshop manual would give all relevant info - - ie float hights an base settings for pilot air screws etc. Soz to be vauge .. .. but without them in front of me, its impossible to say. Have you had it long? has it always been like this? has the fuel consumption gto worse latley? has any one played with it lately?                                                                                                                                                                                 

not had it long   its got worce i think   and havent messed with it   not shure what to do so left it alone  all i done is put a cleaner in the fuel   and the mpg   got less   still runs fine i do get a slugish period whilst getting warm   it starts fine runs ok for a while  then mid warm up it gets sluggish   then when fully warm its brill even picks its draws up with me on it   i,m not big clive for nothing   and its my waistline thats big  

solved the smell of petrol  I SOLD THE BIKE AND GOT A BETER ONE                                                                                                                                                                              

Thats as good a solution as can be found ))                                                                                                                                                                               

works everytime what have you got now ?                                                                                                                                                                              

yamaha tdm 850 its a old one but new to me been well looked after so comfy compaired to my old one   and the breaks   well i nutted the faring the first time i used them and it runs well to                                                                                                                                                                              

Had one of the first ones of those in the country long ago, good all rounder. In winter check brakes for salt corrosion and rear cush drive bearings for wear, forks could have done with progressive springs. Did 74000 miles in 3years. Think I still have most parts of the ventura back pack system in the loft somewhere.