2002-2003 Bombardier Baja DS650 Service Manual, Page 54Get this manual
Section 03 ENGINE Subsection 02 (TROUBLESHOOTING)
SYMPTOM CONDITION TestInspection
ENGINE DOES NOT OFFER MAXIMUM POWER ANDOR DOES NOT REACH MAXIMUM OPERATING RPMNORMAL USE1Check spark plug condition andor gapaFouled spark plug or wrong spark plug gapReadjust gap and clean spark plug or replace2Check spark plug typeaImproper spark plug heat rangeInstall recommended spark plug (refer to TECHNICAL DATA)3Perform engine leak testRefer to ENGINE LEAK TEST procedureCheck for possible piston seizureaDamaged head gasket andor seal andor leaking inletexhaust valve(s)Replace andor repair defective parts4Check for water in fuel or contaminated fuel by other products (kerosene, diesel, etcaThere is water in fuel or contaminated fuelDrain fuel system, search for leakage and refill it with appropriate fuel5Check engine compressionaWorn piston(s) andor piston ring(s)Replace (refer to CYLINDER AND HEAD)