Re: 415H O-ring Chain
"Small CC" Motorcycle racers avoid O ring chain because of power losses.
This is at the expense of maintenance though.
O ring chain was designed for durability and low maintenance on Road Bikes or extreme conditions like enduro racing.
Also, they dont typically have a 10t sprocket that will further sap power with bending losses.
Its a myth that O ring chain out lasts non-O ring chain. Its the construction materials and lubrication that determine chain life. A high tensile steel non O ring chain will outlast a mild steel O ring chain.
The ultimate "quality" setup for you would be Titanium chain and sprockets using the best fully synthetic chain lube. Or design a gear drive...
Anyway, O ring chain is old news, if you must have a rubberized chain then its X rings or V rings you need.