Valve, Black Diamond   Stainless, Std. EX,

Yamaha   WR / YZ   250F, 2001-2013

Yamaha
WR / YZ 250 F 2001-2013

Black Diamond Valves Standard. Kibblewhite # 80-80077, EXHAUST
Head Diameter 24.50mm / 0.965 inc.
Stem Diameter 4.50mm / 0.1758 inc.
Tulip 25 degrees,
OL 77.98 / 3.070 inc.

NOTE: Kibblewhite advise to use Kibblewhite valve spring Kit?s with Kibblewhite valves. Use Part no 65-721.FK (Full kit. Comes with exhaust valve seals only, use OEM seals for intake.) or 65-721.SP (Springs only)

All KPMI® Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond™ process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.

Part No. 65-422.KW.SS (oro2u.com)

Cross reference numbers.
Kibblewhite # 80-80077, PSYCHIC XU-09519E, VERTEX 8400005-1, WISECO VET005, 5NL-12121-10-00,
2003 WR250F - WR250FR VALVE
2003 YZ250F - YZ250FR VALVE