PISTONS & PISTON RINGS (Ȧ*ȡ1ȝ 2191 WISECO HIGHCOMPRESSION PISTON KITS FOR EVOLUTION SPORTSTERS AND BIG TWINS 2192 WISECO 3 3/4" BIG BORE PISTON KITS FOR EVOLUTION BIG TWIN Newly designed high-compression piston kits for Evolution engines. Wiseco forged pistons are well-known for their superior strength over stock cast pistons and can be set-up at .0025" to .0035" clearance for quieter operation. Compression ratio listed is with stock stroke. Each kit includes 2 pistons with rings, pins and clips. Dome Size Std. +.005" +.010" +.020" +.030" +.040" Sportster thru 2003 1 XL1200 9: 1 Compr. 730049 - 730050 730051 - - 2 XL1200 10.5: 1 Compr. 238789 238792 238790 238791 - 238793 Evolution Big Twin 3 1340 8.5: 1 Compr. 235285 - 235286 235287 235288 235289 4 1340 10: 1 Compr. 730054 730055 730056 730057 730058 730059 These piston kits will convert your 1340 Evolution Big Twin motor to a 93.4 cubic inches (1530 CC) Big Bore with stock stroke. Must be used in combination with a set of 3.740" bore cylinders. No cylinder head modification or re-balancing of the crankshaft required, just have your crankcase bored to the spigot size of these big bore cylinders. Compression ratio is 9.5 to 1 when using the stock Harley cylinder heads. Kit includes a pair of Wiseco forged pistons, Hastings piston rings, wrist pins and piston pin clips. Top end gasket kit for your year motorcycle must be ordered separately. Piston dome specifications All valve pocket specifications are measured from deck height Dome Style Dome Intake Pocket Exhaust Volume Pocket Depth Diameter Depth 1 -2.8 cc -.214" 2.100" -.214" 2 +6.0 cc -.225" 2.100" -.225" 3 -1.5 cc -.178" 2.000" -.178" 4 +12.9 cc -.143" 2.080" -.138" 5 +19.0 cc -.165" 2.080" -.165" Diameter 2.100" 2.100" 2.000" 1.740" 2.080" Note: These kits are designed for use with 1984 thru 1989 and 1996 thru 1999 stock crankcases or any S&S, Delkron or S.T.D. crankcase. Due to a weaker construction of the stock 1990 thru 1995 crankcases the use of these is not recommended they should be replaced with S&S, Delkron or S.T.D. crankcases. Piston kits 238805 3.740" Big Bore piston kit for stock stroke Top end gasket kits 700030 Fits 3.740" Big Bore 1992 thru 1999 Evolution Big Twin Replacement piston ring set (for one piston) 238813 3.740" Std. size Piston dome specification All valve pocket specification are measured from deck height Dome Volume Intake Pocket Exhaust Pocket Depth Diameter Depth -2 CC -.189" 2.000" -.189" Diameter 2.000" www.zodiac.nl 07-095
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