True! Motorbikes would be great. Especially ones designed specifically for African needs like ferrying passengers and deliveries. That could actually be a billion dollar concept if you expanded to rest of the continent like @kenguy said.
Kenya's car market is small but its motorbike market is huge. There are over 100,000 imported motorbikes annually. Motorbikes are the best option for building a manufacturing base. We have rich iron ore deposits, steel mills, fabricators etc. All we lack is govt will to get these players to sit down together and kick start a manufacturing industry. Imagine if all the "nduthis" driven in Kenya were made in Kenya?!