The YS-110-FZS replaces the discontinued YS-.91FZ and YS-110FZ which are no longer available. The 110-FZS is the same physical size and weight as the 91 and 110 and produces 5 to 12% more power depending on fuel used. Propellers will normally turn 400 to 600 rpm more on the 110-FZS. GS R/C recommends prop sizes that allow the engine to turn 8,900 to 9,700 for best results.  We have been using an APC 15x8 on the CrossFire 320E and Bampf 3D Extreme with great exhilarating in both Sport and 3D flying.

The engine has several new and advanced features, the most noticeable being the regulator placement on the left housing, which is now in a much cooler place. The lower crankcase has been strengthened for greater rigidity and reliability during both high air and prop loads.  The cylinder is "liner -less" for better heat transfer.

GS R/C has been flying the YS-110 FZS and evaluating it against other 4/strokes, and the results have been excellent and generally superior to all the other 4-strokes we have evaluated. YS has simply made the most powerful and greatest valued 4-stroke in its class.

GS R/C recommends the YS 110 FZS exclusively for the CrossFire and Bampf 3D ARFs.
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