2004-2005 Honda TRX450R Factory Sevice Manual, Page 311Get this manual
ELECTRICAL
IGNITION SYSTEM INSPECTION
If here is no spark at the spark plugcheck all connections for loose or poor contact before meas uring each peak vo ltage If using the peak vottaqe adaptor, use commercially available digital multi met er ith an impedanc of 10 MnDCV inimum The displ ay value differs depending upon th internal impedance of th multimeter
Connect the peak voltage adaptor to the digital ultimeter, or use he peak vo ltage tester (U.S.Aonly) If using the peak volrage tester (U.S.AonVi, follow the manufac-
DIG ITAL MULTIMETER
IgnitionMate peak voltage tester
MTP07-0286 (U.S .Aonly) or
turer'sinstruction