Engine research

Engine Dilemma!

We have just started with work on the Shell Eco Marathon 2015. Currently we are kind of struggling with engine selection. We have several engines on our mind like the Honda GX35, Subaru Robin EH-035, Yamaha XF50 scooter engine or the GY6-QMB scooter engine. Each has its pros and cons. But currently i favour the Yamaha XF50 because compared to the others it has electronic fuel injection, High compression ratio, Electric starter and good power! Therefore i feel the modifying work to be done is highly reduced on this one!