actually, if you thnk about it, you dont need to reweld the stem. theres really no way for it to come out. but im not a honda engineer, so if they did it, id do it. if the stem is too long, which is usually the problem, you can shim the bottom bearing with a washer. the problem is, you dont know til you fit it up. then the bearings on and its a pain in the as to get off. i s'pose you could try with the ball bearings, but that seems like a pain in the ass.
jc
jc