H2 SX 18-20. H2 SX SE + 21. SX1000 Ninja 21-22. ZX1000 Ninja 11-21. 2x NTN Taper Bearings and Shells. KLE1000 VERSYS LT 21. Note: These are easy to fit (easier than the loose ball bearing setup) and make a far, far superior job with ultimate smoothness.
eBay