166fmm 6 speed engine

[MeatHammer]

I have been searching for an extra 165fmm engine for my x22R to do performance mods to and then swap it out for the stock one. I keep coming across the 166fmm 6 speed engine that says it has better performance. Does anyone know anything about the 166fmm? Is it bigger, faster, better gear ratio etc?

[JerryHawk250]

if you are talking about the Loncin RE250 that would almost be a direct swap. The Loncin RE250 is a counter balance engine so it does have a slight bulge on the front of the engine. Might or might not require a slight modification of the front lower engine mounting bracket.