Haven't heard that. I know they make a 49cc 2 stroke engine, a real screamer, 'cause I once came this ll close to owning one.
They were 4 hp IIRC, which I admit was in a moment of weakness what tempted me lol, (plus Robin's rep) but probably just as well in the end anyway to do without that much 2scream.
...
i'd love to see someone put a 50 together in utility-engine style, it'd be bulky but would have it's uses...an R/S 50 would be something to see, alright
mike: dunno about that, i bet the 35 is about as thin-walled as possible, already. i don't think a company like R/S would cheap-out like that. imo, they'd offer a new larger engine.