V-twin motorcycle engine…….modeled after the Harley Davidson Evo motor and all those after-market knock-offs such as S&S, Ultima, Sputhe, Simms and the like…………includes starter and transmission……some detail excessive, while other a bit less so……many objects, with carburetor, starter & trans all consisting of multiple pieces with most fasteners represented………no internals, but case, cylinders and heads nicely relieved in case someone wanted to take it further……….dimensionally correct within reason, but not an exact reproduction..........works great with my chopper frame found elsewhere on this site (although the exhaust will need to change)......