I have compiled a list of replacement parts for the People S 250 that are made by the aftermarket. This list can come in handy when OEM parts are more expensive, are not in stock, or just take longer to get. Just search on Google or ebay with these part numbers to find the best price. Feel free to add to his list. Hope this helps.
Variator
J . Costa - JC613FS
TurboKit - TM25
Malossi - 5111838
Dr. Pulley - V-231801
Polini - 241.635
(Roller weight size is 23X18)
Variator Sliders
Dr.Pulley - SP2318-J
Polini - 246.036
Malossi - 3711338
Variator Boss
Polini - 935.080
Variator Washers
Polini - 242.036
Clutch
Dr. Pulley - HiT 231801
Clutch Bell
Malossi - 7714321
Clutch Spring
Polini - 243.073
Malossi - 2911074.Y0
Exhaust
Leo Vince - 7456C
Mivv - C.KY.0003.B
C.KY.0003.K (catalyzed)
Spark Plug
NGK - DPR7EA-9
DPR7EIX - 9 (iridium)
CVT Belt
Malossi - 6113028 (size = 1004-24-30)
Mitsuboshi - G9000700 (size 995-24.1)
Bando - G8009770 (size 977-23.3-30-11.5)
Polini - 248.072 (size 100-23-30-11.5)
Brake Discs
NG - 1093 (round)
1093x (wavy)
EBC - MD9100D
Brembo - 68B407B2
(Front and rear discs are the same.)
Front Brake Pads
EBC - FA197 Kevlar Organic (right)
FA228 Kevlar Organic (left)
FA197HH Sintered Double H (right)
FA228HH Sintered Double H (left)
EPFA197 Extreme Pro Superbike Street & Race
Brembo - 07033 (left) (Can be Carbon Ceramic or Sintered)
07035 (right) (Can be Carbon Ceramic or Sintered)
Rear Brake Pads
EBC - FA196 Kevlar Organic
FA196HH Sintered Double H
Malossi - 6214714 (sintered)
Brembo - 07069 (Can be Carbon Ceramic or Sintered)
Battery
Yuasa - YTX12-BS
Rear Shocks
Bitubo - SC177YGB02
Disclaimer: I personally do not guarantee that any of the parts listed will fit your bike. I do not guarantee these parts are equivalent to OEM parts. Said manufacturers list these parts as compatible to the Kymco People S 250.