Top quality Kibblewhite Black Diamond exhaust valves for BSA A65 650 twins 1966-72 including Lightning, Thunderbolt, Hornet, Spitfire, Firebird, etc.
Sold as pair with standard head.
FROM KIBBLEWHITE:
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 light, strong, one piece forgings with profiles that provide excellent flow characteristics.
STANDARD SPECS- HEAD DIAMETER- 35.81MM / 1.410″ , STEM DIAMETER 7.9MM / 0.3105″, TULIP- 25º, OVERALL LENGTH 3.555″
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Read our article: The Legacy of BSA Motorcycles from A10 To A65 Through A70
The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.
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