2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 440Get this manual
ELECTRICAL ('04'05)
IGNITION SYSTEM INSPECTION
NOTE: If there is no spark at the spark plug, check all connections for loose or poor contact before measuring each peak voltage If using the peak voltage adaptor, use commercially available digital multimeter with an impedance of 10 MiiDCV minimum The display value differs depending upon the internal impedance of the multimeterConnect the peak voltage adaptor to the digital multimeter, or use the peak voltage tester (U.S.Aonly)If using the peak TOOLS: voltage tester IgnitionMate peak voltage tester (U.S.Aonly), follow MTP07-0286 the manufacturer's (U.S.Aonly) or instructionPeak voltage adaptor 07HGJ-0020100
DIGITAL MULTIMETER
(Not available in U.S.A with commercially available digital multimeter (impedance 10 MiiDCV minimum)