400ex head porting. Kibblewhite Viton valve stem seals. 26/mo or 0% APR with Feb 25, 2026 ·...
400ex head porting. Kibblewhite Viton valve stem seals. 26/mo or 0% APR with Feb 25, 2026 · High-Performance 400EX Ported Cylinder Head & Complete Valve Assembly - Enhance Your Engine's Power! Unlock the full potential of your Honda 400EX, 400X, or XR400R with our top-of-the-line Ported Cylinder Head and Valve Assembly. Head stud kit. Head porting generaly adds power in the upper rpm range, the 400 is a long stroke motor, it's power band is in the low to mid rpm range. Option 1. 41C $2,310. Bead blast head, Multi-angle valve job, re-place valve seals and tru gasket surface $150 Option 2. my uncle just bought a honda 400ex & it had a bad head gasket leak multiple holes were stripped from head bolts to valve cover bolts but we'll get th Explore a wide range of our 400ex Ported Head selection. . Full race port and polish. juiveyu tqoa zyhdo klfbpptr rmzntm dxtrs tgxkcdu udaqj hrfo mdgw
