Exhaust valve from KIbblewhite Honda XR500R ’83-’84 XR600R ’84-’00 XR650 L , NX650 , XL600 R / RM / LM GB500 clubman XBR500.
- Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel
- Lightweight, strong, one piece forging with profiles that provide excellent flow characteristics
- Valve is infused by a special German process to a depth of .002, with a surface build up of .0002 which 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 (F.E.A) software, and profiles are tested on a computerized flow bench
- Stems are coated with black nitroneg
- Made in the USA
Brand; KIBBLEWHITE
Vendor Part Number; 30-3004
Application; Exhaust
Head Diameter; 1,220″
Head Diameter Imperial; 1.220″
Head Diameter Metric; 31.00 mm
Length; 4,095″
Length Imperial; 4.095″
Material; Stainless Steel
Model; Black Diamond™
Product Name; Valve
Size; Standard
Size Metric; Standard
Stem Diameter; 0,2585″
Stem Diameter Imperial; 0.2585″
Stem Diameter Metric; 6.60 mm
Tulip Angle; 29°
Tulip Angle Imperial; 29°


