The S&S 113", 4"-bore engines have been on the scene for about five years and although they are no longer the biggest production engine S&S offers, they still are very popular because they have many features that riders and builders really like. The 113 is actually shorter than a stock Evolution® engine by about 050", which makes it easy to fit into any stock 1984 thru 1999 frame, and engine life and dependability are better than you might EXPECT from an engine this large. Some standard features of the 113 that make it a good choice are: a 4"-bore with a 4 1/2"- stroke pushing high-compression 10.1:1 forged pistons, an S&S 600 cam, chrome-plated die-cast rocker covers, billet tappet guides and gear cover, S&S roller rocker arms, S&S electric compression releases, the S&S High Volume High Pressure (HVHP) oil pump, and an S&S “Super G” carburetor. Not recommended for kickstart applications.

Engines with IST Ignition
Engines purchased with the S&S IST ignition will receive a three year warranty because S&S is so confident that this ignition will prevent damage to the engine due to knock or detonation.
Natural finish