i dont even need to look at the motor, i know exactly what it is.
ideal, except the boxer part makes for length...
r/c engines. my drawbacks are gunna be different.
theres the length of it being the boxer.
widthwise, theyre great. smooth, grunty, and that 5.5hp is without pipes...
on singles, theyve removed the fan and replaced the cdi with a nice low profile hub.
the hub is a hub and not a flywheel. the prop is the flywheel. so they need a flywheel attached. some kind of weight.
starting is hard as, with a prop, you generally flick it or use a nosecone starter. once you use a centrifugal clutch, there goes clutch starting. tricky.
theyve generally got no provision for a pull starter. fuji/imvac comes to mind. its a standard robin/subaru (subaru is fuji) with a modified flywheel (no shroud) and the starter has been removed, used for a mounting plate. cranks cut short. it also costs twice the price? go figure...
use a slip belt clutch or some other type of manual clutch, and you have a sweet engine
having no starter and a short crank means they will fit between the cranks on most standard MTB's... if you want to go with an "in frame" build.
cooling is usually fine, youre meant to be moving on a pushy. simple air shroud can be made easily if worried.