Here are some strange new engine designs. Very creative and fun to watch, but maybe some are a little too oddball to be practical? https://www.youtube.com/watch?v=bBrUrgNf5y8
Current motorcycle collection: 2002 Yamaha FZ1; 2005 Triumph Bonneville T-100; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2011 Zero S 16.6 kWh