I think that the ECU retunes itself on ER6n- mine gave a regular 19km/L around town. When I went on my first long trip on the bike (4000km) the first tank of fuel was 19km/L. Every tank after the first highway tank was 23km/L. All on 91 fuel, non ethanol.

2 X ZRX1200R 4 X ER6N, GT550, 1988 ZX-10, 4 X GPZ250R, 4 X GPZ900R and GPZ750R

Yeah I like Kawasakis.