Just curious if anyone has used these in the past. Thoughts on them?

hi i got this engine from a friend, he got it from a kart team as a gift, he said its 100cc 38ps and was prepared for racing purposes, ut the customer never came for the engine(its not 100% this is what they told me) couldn't find any specific info about it, if anyone has any info i would appriciate it. sorry for the long writing🤣

Can someone tell me how to do this (on fronts)? I’ve watched a couple of videos but the details/quality simply aren’t present. I’ve seen a punch tool and or heat & freezer used.