Categories Classic Cycle Video In Praise of 50cc Motorcycle Racing Post author By Harlo Post date December 1, 2009 No Comments on In Praise of 50cc Motorcycle Racing The barchetta equation (small displacement + light weight = good fun) works for motorcycles too. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) ← Vintage Racing Ad: Dunlop → The Porsche Factory: 1972 Leave a Reply Cancel reply