Complete Genuine YX140 140cc engine (current year model). The latest year model 140cc engine from the YX factory. The YX 140 engine is one of the most popular horizontal lay flat engines in the world, and having had so many slight revisions over the years to tweak this masterpiece closer and closer to perfection, this is, as we would say, one of the strongest and most rider-friendly 140 engines you can put your money into.
