Valvetrain Upgrades

Upgrade your CRF300L's valvetrain with Kibblewhite Black Diamond valves, lightweight springs with titanium retainers, and CBR300R camshafts.  

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. 

Black Diamond 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. We've seen consistent concentricity issues with the OEM valves and these KMPI parts eliminate that issue. 

CBR300R Camshafts are a drop-in upgrade from Honda's own lineup. Increased lift helps boost horsepower without undermining midrange torque. These cams are an integral to optimizing our 301cc big-bore kit. 

Options explained:

• Complete Valve & Spring Kit includes Black Diamond valves, lightweight spring sets with seats, titanium retainers, and valve seals.
• Lightweight Spring Kit includes springs, titanium retainers, spring seats, and valve seals. 
• Black Diamond Valve Kit includes intake and exhaust valves.
• CBR300R Camshafts includes intake and exhaust cams.