Good used engine from a 1998 ski doo formula 3 700. Had 4800 miles on it. Judging by the markings I. The cylinders I imagine the top end was overhauled at some point. The only down side was I broke a exhaust manifold bolt off the mag and pro cylinder upon disassembly.i know individuals that have no problem removing these and figured it was bed for some one else to tackle. Compression was 134/132/134. Ran good till the Cdi failed last winter. Thanks for looking.