You state 'no power on a hill whatsoever', but I'm sure you mean reduced power.
Power loss on hills is quite common in all scooters... it's all to do with the gearing (of lack of therein).
If it's a short hill, the engine and gearbox can normally handle it, but even a slight hill that continues for a few hundred yards will start to 'kill' the power.
However, if it's a new scooter, the Peugeot engine takes about 700-900 miles to run-in. If you don't see an improvement by then, you should get it serviced, as it should still be under warranty within the 2nd year.
I don't mean to be cheeky, but if you're a bit on the heavy side yourself, hills and scooters really don't mix. I know because I am!! That's why I've got a big boys bike.
Anyway, if you are thinking about upgrading any parts, I would recommend a full service at a good mechanic first. Be careful - buying a new sports exhaust may not be the answer.
Marvo Magic (Big Biker)
January 2009