2003 Honda ATV TRX650FA Rincon Factory Service Manual, Page 447Get this manual
LIGHTSMETERSSWITCHES M ove he float to he bo tt om (RESERVE) po sition, turn the ig nitio switch to "ON" and chec the fuel ga uge Seg me ntRES" shou ld blin kIf th fuel gauge does ot function prop erl y, che ck th fuel level sensor (pag 22-13)
If th fu el level sens is OKrep lace th co mbina -
tion me terIf all seg ent blin ring inspect io n, repl ace he co binat io meterTurn th ig niti on sw itc to "OFF"