Hi guys, Ive just bought the s/walk er 120 size. I thought i would let you know how the zenoha 20cc gas engine fits the model. Its not the ideal fit but i,m stuck with it now. Also there is a bit of a fight in other areas. Sorry for the crap quality pics, but i hope you get the idea how things went. The cowl is not screwed in yet so it will be a bit better fit when its all screwed up. Bill .