No bottom end...help?

Hi, my aprilia sr 50 has had a new exhaust today but something has gone wrong, my bike was on it's side for a while when fitting the new exhaust but now its fitting there is no bottom end going up a bank, on a flat its great but it almost dies going up a bank... PLEASE help

You need to put some lighter rollers in and up jet it, what exshaust do you have and i might be able to help

my new exhaust:
http://www.adrenalin-pedstop.co.uk/p/POLINI-SCOOTER-TEAM-EXHAUST-SY-2346.aspx

ive been trying all day to get my bike back to normally! cleaned the carb and air filter!

IF Its the runner engine one i would say about 60 jet and go down to 4 to 5 gram rollers mate

^^^^ as jakey said + some stiffer clutch springs if initial pullaway is still slow...

thanks for the help, i'll try these things and let you know how i got on

ok mate, good luck