Page 139 of Engine Components & Gaskets by Zodiac

cylinders wiseco 80 ci big bore kit for v-rod what happens to a new harley-davidson v-rod when you leave it in wiseco.s r&d department to flog over the winter the wiseco big bore 1320cc v-rod kit wiseco punches it out to 4.250 bore the same size as a 454 chevy and big enough to swallow the factory sleeve then wiseco designs and forges the leading edge piston and ring package to compliment it you would expect a piston that has grown from 3.937 to 4.250 in diameter to gain a lot of weight right not so thanks to the trick new dedicated forging coming out of wiseco s in-house forging department only a few grams they also bumped the compression up to a reliable 12:1 wiseco put a performance supertrapp exhaust on it and took it back to their in-house dyno to give you real horsepower numbers you can expect another 30lbs of torque and horsepower that goes to a rubber melting 138hp at the countershaft installation of this kit requires the stock crankcases to be bored to accept big bore sleeve kit includes forged pistons piston rings clips piston pins gasket kit o-ring kit and sleeves 234137 234138 234143 234144 80ci big bore kit for v-rod replacement o-ring kit replacement gasket kit replacement piston ring set wiseco 3 3/4 big bore piston kits for evolution big-twin these piston kits will convert your big-twin motor to a 93.4 cubic inches 1.530 cc big bore with stock stroke must be used in combination with a set of 3 3/4 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 for those who want even more cubic inches there is a 103 cubic inches 1.665 cc piston kit that has to be used with 4 5/8 stroker flywheels installed these pistons use the same cylinders as the 93.4 ci kit and give a compression ratio of 10.5:1 kit includes a pair of wiseco forged pistons hastings piston rings wrist pin and piston pin clips piston kits 238805 3 3/4 piston kit for stock stroke 238846 3 3/4 piston kit for 4 5/8 stroke replacement piston ring set for one piston 238813 std size replacement cylinder head and base gasket kit 238852 for two cylinders note these kits are designed for use with 1984 thru 1989 and 1996 to present stock crankcases or any 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 delkron or s.t.d crankcases piston dome specification all valve pocket specifications are measured from deck height dome volume -2 cc intake pocket depth diameter 189 2.000 exhaust pocket depth diameter 189 2.000 07-139 07 piston dome specification all valve pocket specifications are measured from deck height dome volume intake pocket depth diameter -14.2 cc 225 1.780 exhaust pocket depth diameter 195 1.540

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