2008-2010 Kawasaki KFX450R Factory Service Manual, Page 7Get this manual
PLEASE DO NOT TAMPER WITH NOISE CONTROL SYSTEM (US MODEL only) TAMPERING WITH EMISSION CONTROL SYSTEM PROHIBITED: Federal regulations and California State law prohibit the following acts or the causing thereof: (1) the removal or rendering inoperative by any person other than for purposes of maintenance, repair, or replacement, of any device or element of design incorporated into any new vehicle for the purposes of emission control prior to its sale or delivery to the ultimate purchaser or while it is in use, or (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any person
Do not tamper with the original emission related parts: Throttle body or internal parts Spark plug Magneto ignition system Fuel pumpFuel injector Air cleaner element Engine control unit (ECU)
TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing thereof: (1) the removal or rendering inoperative by any person other than for purposes of maintenance, repair, or replacement, of any device or element of design incorporated into any new vehicle for the purpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use, or (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any personAmong those acts presumed to constitute tampering are the acts listed below: