KYMCO K-XCT 300i Owner's Manual page 306

5. Final Drive > Transmission Oil
Final Drive Oil
SAFETY FIRST: Protective gloves and eyewear are recommended at this point.
Place the scooter on level ground and up on its center stand.
The oil drain bolt and oil filler bolt are located on the transmission.
Gear oil type:
At disassembly
At change
Gear oil capacity:
5-3
SAE 90
0.23 Liter
0.21 Liter
K- XCT 300i