Elf HTX 740 Gear Box Oil - 75W 1Ltr -
 
 
Elf HTX 740 Racing Lubricants extreme pressure 100% synthetic (PAO) Group IV lubricant for bike gearboxes.
This is the recomended oil by Montesa for the Cota 315R & 4RT's gearboxes.
This is a very low viscosity gear oil.