18 times to spin the rear sprocket one full revolution

45s and Servicars

Threads measure 5/8" x 18 TPI

Stainless steel

Black Diamond Exhaust Valve Triumph 650 750 OEM #70-2904 Sale-Okay 18 times to spin theHigh quality exhaust valves from Kibblewhite Precision Machining that fit Triumph 650 and 750 unit twins 1963 1982 including T120 and T140 Bonneviile as well as TR6 and TR7 Tiger models. Replacement for OEM # 70 2904. 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