I am in the process of rebuilding the scoot to a 300 cc engine capacity. I like to share with you the reason for doing so. I looked into the MPG values form various scooters on the hubpages.com website and put the extremes per cylinder capacity together in the graph.
Of course there is a wide spread but the trend is very clear. I need a smaller engine to improve onthe FE (if all other circumstances stay the same like aero and gearing and the hypermiling).
So I expect to bring the fuel consumtion from just above the 3 liters per 100 km into the approx 2.8l/100 km.
Also you can see that only hypermiling can bring you a big step forward, but we all know that. However to get to the best result possible also aeromodification are absolutely nessecare. Look for instance at the results of Allert with his full fairing on the 125 cc Honda. And the VW 1l although this is a Diesel with atleast 15 % advantage in the engine efficiency.