1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 402Get this manual
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2, TI CHNICAL FEATURES 3E ElE'CTRIC SHIFT PR.OGRAM (ESP) 23-1
MAIN HELAY
CONTROL MOTOIi
ELECTRONic CONTROL UNIT
GEAR POSITION SWITCH