I agree with the above advice.No point in changing just the upper, the lower always wears first and it also takes the lions share of the load.
Getting ready to put on a Traxxion lower tree next week.I'd advise you to buy an extra lower OEM Honda seal that goes under the bottom bearing on the steering stem, and throw away the one in the All Balls kit (it doesn't fit properly). Sometimes you can reuse the old Honda seal if you don't destroy it getting the old race off the stem.
Getting ready to put on a Traxxion lower tree next week.
Do you have the part number handy?