petrol smell through exhaust and fuel efficency fell down

  #1  
Old 01-04-2014, 06:55 AM
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Join Date: Jan 2014
Posts: 1
Default petrol smell through exhaust and fuel efficency fell down

recently my cbr250r got a starting problem,service center guys checked everything ,cleaned fuel filter and atlast solved problem by changing the whole key set becausse zener diode connection lost.but now i am getting fuel smell through exhaust and fuel efficency fell down drastically.
what may be problem??
o2 sensor
or
fuel injector
or
spark plug
or
engine components ???
 
  #2  
Old 01-04-2014, 08:51 AM
74demon's Avatar
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Join Date: Sep 2011
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Default

Fuel pressure regulator?
I'm not that familiar with the 250....
 
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