400EX 400X XR400 88mm Big Bore Kit +3 Cylinder 426 Top End Rebuild Redo Parts Cylinder Works This is a bolt on

This is a bolt on kit

Washable and reusable

Specifically designed for Yamaha YFZ450R and YFZ450X fuel-injected models from 2009 to 2025

Hi-temp piston rings

BRAND NEW GENUINE OEM YAMAHA BANSEE CRANKCASE

400EX 400X XR400 88mm Big Bore Kit +3 Cylinder 426 Top End Rebuild Redo Parts Cylinder Works This is a bolt on12100 KCY 670, 4606M08800, C7826, 71016 4, 12191 KCY 673,12100 KCY 670, 12191 KCY 672, 13011 KCY 670, 13101 KCY 670, 90601 KA5 000, 13111 KCY 670, 12100 HN1 A70, 12191 KCY 672, 12251 HN1 003, 12391 KCY 671, 14560 KCW 851, 12100 HN1 A70, 12191 KCY 672, 13011 KCY 670, 12100 KCY 670, 4606M08800, C7826, 71016 4, 12191 KCY 673, 13011 KCY 670, 90601 KA5 000, 13103 KCY 67013111 KCY 670, 12251 HN1 003, 12209 KL4 005, 4040, 4606M08700, 4606M08800, 4667M08900,