I own a 2012 Romet CRS 125 wanting to increase its power a bit more I thought of this particular engine. I purchased and am mega satisfied. At the very beginning the engine looks very well made, during installation there were no problems, the engine fits in the frame plug and play. The whole procedure of translation including dismantling the old one until firing up the new one took about 1 hour.
The investment was worth it, as the motorcycle got a new life. The engine fires from a shot, runs evenly, gears enter gently and most important . power compared to the 125 is 2x more
I recommend to anyone who wonders "whether it is worth" such a procedure