The Sukhoi is an aerobatic airplane. It's expected that they have more power than the average model. Excess power is more often what you want for an aerobatic model. That airplane will have enough excess power with a 60 2cycle or a 90 4cycle. And it will fly even better if that lead is removed if it's in your model.

BTW, crash damage is often increased when there are lead slugs inside the fuselage. For one thing, the airplane usually hits harder. For another, concentrated mass often blasts it's way through bulkheads and fuselage sides.