KIBBLEWHITE BLACK DIAMOND EXHAUST VALVE PAIR FOR TRIUMPH 500 TWINS FROM 1961-74, REPLACES PN# 70-4013 70-6854. MAY ALSO FIT SOME PRE-UNIT 500 TWINS, CHECK YOUR PARTS BOOK FOR FITMENT. SIMPLY THE BEST VALVES AVAILABLE FOR YOUR VINTAGE 500 TWIN! AVAILABLE IN STANDARD AND OVERSIZE, USE DROP DOWN MENU TO SELECT SIZE
FROM KIBBLEWHITE 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: HEAD DIAMETER….1.325″ / 33.66MM. STEM DIAMETER…..0.3095″. TULIP…..27 º radius. OVERALL LENGTH…..3.425″
OVERSIZE: HEAD DIAMETER…..1.375″ / 34.93MM. STEM DIAMETER…..0.3095″. TULIP…..27 º radius. OVERALL LENGTH…..3.445″