got a new big world model extra want to put in a moki 210 this is a 6.5kg model is the 210 to big or should i rather put the 180 , plane is rated for 1602/st. i must add that I'm not concerned about the weight but the power, anybody with big plane exp thanks

no advice !!!!

Both are good choices, but the decision depends on the type of flying you plan to do. For competition/3D go w/ the 2.1. For general sport flying and standard aerobatics, even a OS 1.60 will do.