No disrepect Axy, but I tend to think jwisen is right. It seems most people in this section are getting in the 60s and 70s with their X 250s and I'm in the 40s. With my size and driving style/area I expect there to be some mileage loss, but not 30-50%. I spoke to the local Kymco dealer's tech, and he seemed to have other things on his mind. He simply said, "Hmm" and then walked away. I need to take the bike in for state inspection this week, so I'll ask the guy who inspects it if he has any ideas. He's a motorcycle tech, but certainly a lot of this info will crossover.
X250 has the same engine and CVT as my People 250S and 20 lbs heavier and it is possible to do 60 or 70 mpg only if you drive at a constant speed of ~50 mph without a passenger.
Mileage is a sensitive subject. I have often discussed it with my friends and now I keep away from such discussions. Most people claim consumption "roughly calculating". "I went from Mike to John, it is AROUND 130 kms, then I filled up AROUND 5 liters, so the consumption MUST BE AROUND...". Trust me, a lot of people do not take notice of exact tacho number when filling up first and second time and do not fill up exactly to the top of the gas tank.
Furthermore, the last such case a colleague of mine who has Chinese 125cc 4stroke scooter that allegedly consumed close to 10 l/100 km or 23 mpg. After dismissing a lot of (mechanical) things, chaning carb etc. the problem was in the only possible thing that was not changed - tacho. It was off by 50 %, coupled with inaccurate reading of the tank fill ups equals off scale calculation. In fact, the scooter`s real consumption was 3x lower.
The best gas mileage I have seen on People 250 S was 3,8 l/100 km or 62 mpg under super-duper-ideal conditions. I think the theoretical low of consumption must be there because this is already the consumption "area" of 50 cc 2 stroke or 125 cc 4 stroke scooters.
I am looking now, 70 mpg is 3.3 l/100 km - I think this scooter uses that much fuel idling per hour.
p.s. I am looking now at one of the previous posts, people are doing 75 mpg with Xciting 250i. I have seen 75 mpg with two scooters in my life: Piaggio NRG 50 and Agility 125, driven very carefully. I guess it would be possible with 250 cc scooter that almost does not apply the throttle and weighs maybe 100 lbs.
I wrote a report this weekend - I went for a trip with my gf (420 lbs of total passenger weight) that included a lot of highway driving at top speed of indicated 81-87 mph with gusts of frontal wind. The consumption was 5.3 l/100 km or 44 mpg - the worst consumption I have seen on my P250S.
The average I do driving from suburbs to the city and back daily is constant and consistent 56 mpg from day one (it has 5800 kms on it now).
Now, this became a lengthy discussion... hope others will share their input and numbers too...