BSA A65 650 Kibblewhite Black Diamond STD Exhaust Valves (2) 1966-72 PN# 68-0663

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