In the past Honda experimented with V4's. Why did they eventually retire that idea and move to I4? Is it cost, weight, hp? Most Motogp engines are V configuration these days. For example the Ducati is a V4, and Honda V5. The Ducati Desmosedici RR, a motogp bike for the road has a V4. But its cost is beyond most ordinary people.. I heard some rumors that since the new R1 is getting rave reviews for its power delivery. The next Fireblade may have a V5 engine. What do you guys think about more Japanese manufacturers experimenting with unconventional engine configurations instead of the old tired I4?