Heres a re-post of Johns instructionsHere's a quickie step-by-step - it's as easy as ABC . . . but first, put two of the radial bearings in the freezer (15 minutes).
A) Built both hubs as detailed below in Steps 1-5
From the Hub-side
1. Insert a radial bearing.
From the Grip-side
2. Insert large ID washer from existing grips (only existing part re-used).
3. Insert Thrust Bearing (make sure large ID seat goes in first, that you've lubed the race, and then place small ID seat is last).
4. Insert thin 6 mm ID washer.
5. Insert radial bearing (the one from the freezer). Use a socket which is about the same size as the OD of the bearing to drive it into place and seat it . . . yes, it's supposed to be an interference fit, i.e. pretty darn tight! Also, be very careful not to damage the shield - which, if your tool for seating the bearing is slightly small, will happen pretty easy - you've been warned! After this outer bearing warms to normal temperature, it'll be very, very tight in the grip - this is good! After it's been flown, it won't be this tight.
B). Drill the aluminum center hub out with a 1/4" drill bit - this is very easy as the hole is already about the proper size. After it penetrates, give the drill a little wiggle so as to cause the bit to create some clearance.
6. Insert new 6 mm ID dampers and lubricate the ID.
7. Insert 6 mm spindle shaft and center (approximately is plenty good enough).
8. Slide the thick 6 mm ID spacer washer onto each side of the spindle.
9. Slide a grip into place. Be careful to align the small 6 mm ID washer that fits between the thrust and radial bearing as you slide it onto the shaft so that you don't jam and deform it - you've been warned. I use a screwdriver, or whatever is handy, to align this washer before I slide the grip assembly onto the shaft.
10. Use a small dab of blue thread locker and screw the Allen-head machine screw along (with the steel washer) into the end of the spindle shaft.
11. Rotate head and repeat Step 5 for the other grip assembly.
12. Last thing, tighten both Allen-head screws using a couple of T-handle or L-shape Allen wrenches.
John Beech - GM (and janitor)
Port Charlotte FL