As a restore of NS-1, long ride after fixing OEM's Bearing was gorigori so I tried inserting Taper roller even in the sense of experiment First of all, since the area to be hit is different even from the receiving side of Bearing, I think that it contributes to the dispersion of force and is related to the Length of the life span. As for installation, it is the same as OEM and by saying that Bearing's Outer is press-fitted into the Frame's Stem section Rubber with Han or the like etc etc. I hit and hit the OEM Outer that I removed. Bearing is driving in StemRace, but I got on with the removed OEM Outer and hit it with PVC Pipe and inserted it I assembled Stem into Frame and cut Handlebar, before exchange it had gorigoly feel but it was very pleasant to move to Smooth. Grease sticks out water resistant Bearing Grease and wipes out if it runs out I still can not get out of Fork's OH because of the Gold monetary problem but I would like to Impression if there is another opportunity after installation.