1985-1986 Honda ATC250R Shop Manual, Page 158Get this manual
FRONT WHEELSUSPENSIONSTEERING
Install the dust seal onto the steering stem and press new lower bearing over the stem with special tool
STEERING STEM DRIVER AND ATTACHMENT 07946-MBOOOOO or 07953-4300100 ATTACHMENT GN-HT-54 (U.S.Aonly) DRIVER ATTACHMENT, 42 47 mm
07749-0010000
Drive new upper and lower bearing outer races into the steering head pipe