Originally posted by PineBaron
I use an FS63FZ on my Zen50. Its the best 4C engine for it; sounds great, performs great etc.
Vim
(semi-repost)
I would
love to see pictures of your installation. I have one of these kits in the box - I have a YS .61 2-stroke on hand which I can use in it but I'd really prefer to use one of my YS 4-strokes.