https://stlouis.craigslist.org/mcy/d/millstadt-1973-suzuki-tc100/7087627662.html
Another one! Dig the crazy intake!
old rotary valves rule. :vroom: :righteous:
Why'd they stop making them?
packaging mostly, but there are still some around and being made for karting? and peds i think.
look at how wide a bridgestone twin motor is. awesome but wiiiide
Rotary karting engines are pretty rare these days, reeds have taken over as they tend to have a wider usable power band. And the packaging is just easier. With most rotaries the carb sat directly above the chain and if you were unlucky the chain would knock the carb off and sometimes that would ruin the rotary valve cover plate and sometimes the crank. It wasn't pretty.
On motorcycles I definitely think packaging is the main reason reeds have come along. Of course there are a few rotary engines where the valve disc is on the back side of the cylinder and the carb mounts in the traditional rear part of the engine, so who knows? Reed valve engines might bust be cheaper to manufacturer as well.
reed motors are def more cost effective to make.
the few rotary bikes i have had, singles, were always on the opposite side of the chain. :twocents: