10.FINAL REDUCTION/ TRANSMISSION SYSTEM Mongoose/KXR 90/50 Fill the engine with oil and install the oil filler bolt. (Refer to the "TRANSMISSION OIL REPLACEMENT" section in the chapter 3) Specified Gear Oil: KYMCO SIGMA GEAR OIL 90# Oil Capacity: At disassembly : 0.12 liter At change : 0.11liter 10-6