Klaviator, found a few posts:"New Tires", some feed back on 120/70/14/140/70/14
http://www.kymcoforum.com/index.php?topic=9019.msg97428#msg97428,
http://www.kymcoforum.com/index.php?topic=8791.0
I have read all those threads. People say the tire fits if you remove the hugger and it "looks cool" No one has said anything about how it handles. As for this statement:
"The 70 series tire is taller and affects ride quality...ride is harsher... Taller also increases your braking distance because more force is needed to stop a tire with bigger radius. Taller tire also means poor acceleration... However, taller tires give better mileage but poor handling... I would go for a wider and and lower tire.... they look cooler...
"
It makes no sense. A taller tire will normally give a smoother ride. However, if you go with a taller and wider tire and run the same pressure, it may degrade the ride and it will weigh much more than the stock tire. The brakes on my super 8 work fine, I doubt a taller tire will affect braking enough to notice. Poor handling? How? A taller tire will increase cornering clearance, something the super 8 is short of. Also, it is likely to increase mileage slightly since you will lower RPMs. He is correct about less acceleration.
My experience with putting a taller tire on the rear of my Aprilia is no noticeable change in handling and or ride. Reports from people putting a wider tire on is that it makes the bike want to stand up in curves. And this is with a one size wider tire. Normally going up one tire size is fine but 2 sizes may not be.
The stock rear tire is 120/80-14. If I could find a 130/80-14 I'd go with it. A 140/60-14 will be wider and shorter than stock. It will increase your engine RPM at a given speed, decrease cornering clearance, and maybe give a harsher ride. I wouldn't be surprised if it made the scooter handle like sh**, but I don't know because no one has commented on this. I couldn't care less that it looks " cool". I want a tire that works. I ride my scooter. I don't stand around looking at it.