There don't seem to be many on this forum from Thailand, but on another there are guys who have had their CBR250R for a couple of months now, and are typically reporting 30 km/l (67 mpg, US) plus, dropping a bit below that at 120 - 130 km/h (75 - 80mph) or faster. I saw a road test done in the US where spirited riding yielded 56 mpg, US.That's probably on the flat & not revving past 6k as you ride. Highly unlikely except maybe during break in. & weighing 100 lbs.
The Powerhouse Honda information shows MPG figures that reflect U.S. gallons so the 77 mpg figure is already in U.S. gallons, not imperial gallons based on my understanding. This figure is not unreasonable, and does jibe with the information on Yamaha's American site for the fuel-injected WR250R dual-sport single that advertises a figure of 71 mpg (U.S.) EPA for that bike.1 US gallon = 0.83 Imperial gallon
77 mpg x 0.83 = 64 mpg
Reports on the CBR 250 in use are in keeping with this. A bit more ridden moderately; a bit less ridden hard.
Hey Redline, awesome to hear that from you. Will you please post some photos of your cbr if possible.I'm just back from 2 days of 150kph highway cruising.
Didn't pay any attention to the fuel economy, but it sure wasn't 33kmp/l.
Usually though if pottering about without excessive speed you'll get 30-33kmp/l.
BTW, have 8500km on the CBR and it's an absolute little monster of a thing. I went for a nice 2 day ride and now, from a nice hard break in it has gone on to destroy everything on the highway, not one vehicle managed to pass it over 800km on what was pretty much empty 3 laned highway. The bike laps it up at 150kph (93mph) at 9000rpm and feels completely safe and sturdy in doing so. That's with a normal riding position and not ducking down onto the tank. The bike is still stock, but my word it's a machine and a half.
Don't know about US highways, but if the traffic is averaging 130kph (80mph) you'll be blasting past 'em, just get the engine broken in nice and hard.