Custom Parts Store

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 07-132 VALVE STEM LASH CAPS These caps must be used on most oversized valves and all valves that must be machined to length. Also used on various racing valves. They eliminate the need of special treatment or hardening of the valve stem tip. Thin stem valve guides Each valve guide is supplied with one matching valve stem seal. Intake Exhaust Size KPMI# KPMI# 236140 236146 Std. (0.562") 20-20010 20-20020 - 236155 +.002" - 20-20022 236143 236148 +.004" 20-20014 20-20024 236144 236149 +.006" 20-20016 20-20026 236145 236150 +.010" 20-20019 20-20029 Valve spring kit 236151 Lightweight racing valve spring kit (KPMI# 20-20002) THIN STEM VALVE TRAIN CONVERSION FOR 883 EVOLUTION SPORTSTERS These thin stem valves and valve guides reduce mass, resulting in a easier revving engine. The valves are Precision Machining's famous Black Diamond that feature a stem measuring only 7mm in diameter. Matching valve guides are supplied with stem seals. Parts are sold individually, so order two inlet and two exhaust valves, two inlet and two exhaust valve guides and the lightweight racing valve spring kit to have a complete set-up for your 883 Evolution Sportster. ZPN Type Head Dia. Length Stem Dia. 749212 Ex 35.4mm 5" .2346" 749216 In 41mm 5" .2351" 749180 Ex 1.700" 5.7" .3106" 749207 In 2.100" 5.7" .3108" 749210 In 2.200" 5.7" .3108" AV&V BLANK STEM OVERSIZED VALVES These high-flow blank stem valves are great for engine builders that really want to go that extra mile to squeeze the last horsepower and foot-pound from an engine. Stems are blank, key grooves must be machined by a professional. Valves must be used with valve stem lash caps as the valve stem tip comes unhardened. Stems are centerless ground to a micro finish with a hard chrome finish for a longer life. SPECIAL EXHAUST VALVES FOR "BRANCH" AND "STD" HEADS High-Flow racing valves made from special super alloy by Precision Machining as a replacement for Branch and STD cylinder heads on Evolution Big Twins but also suitable for custom tuning jobs. For Branch heads: this valve is .060" shorter than stock so valve can be sunk in the head to clear the piston on high lift cams. For STD heads: special, extra flowing, oversized valves, available in two head sizes. 237183 Black Diamond exhaust valve for Branch heads Stem .3096"Head 1.615" Tulip Profile 23O Length 4.380" 232460 Black Diamond exhaust valve for STD heads Stem .3095"Head 1.650" Tulip Profile 24O Length 4.480" 234895 Black Diamond exhaust valve for STD heads Stem .3095"Head 1.750" Tulip Profile 24O Length 4.480" E�G�N� VALVES