I have one of those Super Tiger .90 engines that Keith at BME coverted for me when we were collaborating on another possible project shortly before they closed. I like it a lot. I also got some custom crankcases from him to make twin cylinder 48/50 cc engines out of two Echo 24/25 cc engines. Those are really cool! I made several for other people and have two of my own. Bummer, but the crankcases are no longer available.

Just for your info, Ken at lambertsrc.com does various size Super Tiger conversions and has parts.

AV8TOR