Valvetrain Upgrades

Refresh and upgrade your CRF300L's valvetrain with new OEM Honda valves or premium Black Diamond valves, lightweight Kibblewhite springs with titanium retainers, and CBR300R camshafts.  

New Intake and Exhaust Valves are OEM Honda parts and required when installing one of our ported heads (fresh valve seats require fresh valves). Comes as a complete set of two intake valves and two exhaust valves, with replacement Kibblewhite viton valve seals. 

Black Diamond Intake and Exhaust Valves are lightweight, coated, one-piece forgings with profiles that provide excellent flow characteristics. Every surface is either CNC machined or ground as top quality valves should be. Comes as a complete set of two intake valves and two exhaust valves, with replacement Kibblewhite viton valve seals. 

Lightweight Springs are 18 grams lighter per set for a total reciprocating weight reduction of 64 grams. That's the equivalent of a stack of 11 quarters! A lighter valvetrain makes the engine more responsive, allows the engine to safely rev higher, and helps reduce valve seat and face wear. Comes with with replacement Kibblewhite viton valve seals. 

CBR300R Camshafts are a drop-in upgrade from Honda's own lineup. Increased lift helps boost horsepower without undermining midrange torque. These cams are required when running the 301cc big-bore kit.