My 2004 LC Super 9 with NO MODS only gets 45-53mpg (14,000 km.) These performance 2 strokes really don't get very good mileage compared to the much slower 4 stroke 50cc scoots. But they are much more fun!
I've heard many of the modded Super 9s with performance cylinders only get 29-30 mpg.
If your scoot is running good, and the plug looks fine, then I wouldn't worry about the mileage. It's in the range of normal for this scoot.
Have fun, the Super 9 is a great scooter.
Wil B.
Broadview, IL
'71 Guzzi Ambassador
'91 Nighthawk
'04 Kymco Super 9
'10 Kymco Yager 200gt