I bought crux on 2006 and it gives me a mileage 72kml in city till now . And I like to give you a few tips for yamaha crux.
1) Maintain a speed 40 -50 for good mielage(70-78kml).
2) For new bike Maintain a speed 40 for 1000km.
3) Change the engine oil for a particular km for good life .
4) Do not handle a bike in a rough handle .
5) Every month chech your break & chain (optional)
6) When you apply a break you want to press the clutch at every time .