2008-2010 Kawasaki KFX450R Factory Service Manual, Page 84Get this manual

2008-2010 Kawasaki KFX450R Factory Service Manual, Page 84

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FUEL SYSTEM (DFI) 3-27 DFI System Troubleshooting Guide
Poor Running at Low Speed
Symptoms or Possible Causes Spark weak: Battery voltage low Spark plug dirty, broken or gap maladjusted Ig