1999-2004 Honda TRX400EX FourTrax Service Manual, Page 169Get this manual
FRONT WHEELSUSPENSIONSTEERlNG Place the proper size adaptor onto the threaded shaft and then put the wheel over the threaded shaft and adaptorLube the bead area with water, pressing down on the tire sidewalllbead area in several places to allow the water to run into and around the beadAlso lube area where the breaker arm will contact the sidewall of the tireBREAKER ARM ASSEMBLY