Kibblewhite Black Diamond™ Valve - 80-80916 Yamaha WR 250 / YZ 250 2014-2018 Exhaust Systems Zipper management: rubber straps prevent

Zipper management: rubber straps prevent zipper from flapping

dirt and sand with improved grease retention

mounting brackets included

the 428NZ is a great non-sealed option that will give you greater performance than the OEM non-sealed chain

Kibblewhite Black Diamond™ Valve - 80-80916 Yamaha WR 250 / YZ 250 2014-2018 Exhaust Systems Zipper management: rubber straps preventFeatures Black Diamond valves are CNC machined from one piece forgings of EV8 Stainless Steel Black Diamond proprietary multi stage process reduces friction, and provides superior resistance to corrosion and wear Made in the U. S. A. Must use Kibblewhite Lightweight Valve Spring Kits when installing Black Diamond Valves. Specs Head Diameter 25. 00 mm Riding Style Off Road Application Exhaust Product Name Valve Length 3. 235" Units Each Material