1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 108Get this manual
FUEL SYSTEM
HIGH ALTITUDE ADJUSTMENT
SPECIFICATIONS
Betw ee n
3,0008,000 ft (1,0002,500 m}
Main jet
Th carb uretO must be adjusted for hi gh altitu de riding fbetween 3,0008,000 fiil,OOO2,500 m}STANDARD SETTmG: Bel ow 5,000 ft (1,500 m) HIGH ALTITUDE SETTING: Betw $n 3.0008,000 ft (l ,OOD2,500 m)