1999-2004 Honda TRX400EX FourTrax Service Manual, Page 152Get this manual
CRANKCASETRANSMlSSlONCRANKSHAFT If the left crankshaft bearing is left on the crankshaft, remove it using the bearing puller with suitable protectorUhlVERSAL BEARING
TOOL Universal bearing puller
07631 0010000 or equivalent commercially available in U.S.A
Always replace the left crankshaft bearing with new one when the crankshaft is removedPROTECTOR