Hello i have recently purchased cultus 2016 model , engine was in ok condition , run few hundred Km without any issue , i changed the oil of Kixx 20-50 and air + Fuel filter and installed the Steelmate SC system in it , Tappet cover jain was leaked which i changed as well , after changing Oil + filter it suddently start dropping RPM , as per Mechanic instruction i have changed the wiring for Spark plugs with new one and issue does not resolved , its drops RPM after running few Km specially when head lights and FAN turn on and show engine light again and again and rpm go up , i have no experience in EFI engines and Mechnics here are not that good , what can be the issue and what should be new course of action , please guide.
