1999-2004 Honda TRX400EX FourTrax Service Manual, Page 149Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT MAINSHAFT SPLINE WASHER THRUST WASHER
SPLINE WASHER GEAR (22T) M4 GEAR BUSHING THRUST WASHER WASHER AND SNAP RING DIRECTION:
MAINSHAFT (Ml: 12T)
THRUST WASHER
C3 GEAR BUSING