1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 402Get this manual
2, TI CHNICAL FEATURES 3E ElE'CTRIC SHIFT PR.OGRAM (ESP) 23-1
ELECTRIC SHIFT PROGRAM (ESP)
ELECTRIC SH IFT PROGRAM (ESPI is designed to make g.ear shift operat.ion ea,sier by replacing conventional foot-operated shift ,change ith switch located near the operators handSHIFT SWITCH