www.zodiac.nl 07-129 Thin stem valve guides Each valve guide is supplied with one matching valve stem seal. Intake Exhaust Size KPMI# KPMI# 236140 - 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) 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. 2338 THIN STEM VALVE TRAIN CONVERSION FOR 883 EVOLUTION SPORTSTERS 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" 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. 2337 AV&V BLANK STEM OVERSIZED VALVES A. B. C. D. Qty. 745136 5/16" .395" .160" .080" 1 745137 .2756" .355" .160" .080" 1 745149 .260" .345" .120" .080" 1 745146 .2165" .295" .090" .050" 1 745147 .1970" .280" .090" .050" 1 745148 .1965" .275" .230" .150" 1 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. 2336 VALVE STEM LASH CAPS VALVES (Ȧ*ȡ1ȝ Valve Guides Measurements (Site 539)
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