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4135 heat treated alloy steel head studs
As strong as Chromoly
2023-2025 ProStar S4 TITAN Adventure 155
WORKS ON ALMOST ALL BANSHEE COOL HEADS WITH 421cc TO 465cc CUB OR SERVAL CYLINDERS
DLC wristpins
03-25 YZ450F YZ Crank Bearings SKF Aftermarket Stronger Main Bearing Upgrade Kit Outlander 650 4135 heat treated alloy steel93306 30633 00, K022,BK5049,B5050,B5000,23. 83C072C,23. 6306YA1C4 YZ450F YZ450FX WR450F SKF Crank Bearings Upgrade Kit 20032025 Product Overview Feel the extra kick in your Yamaha YZ450F, YZ450FX, or WR450F with SKF premium crankshaft main bearings designed for performance. Built stronger than OEM and backed by a 1 year warranty, these bearings deliver more durability, better value, and serious power delivery across all terrains. Features & Benefits