Total cos of clutch plate change process is 800 almost. But remember 2 3 points . If your engine oil is recently poured in then clean the bottom side of engine and ask the mechanic to drain fuel in clean bottle as it need to be use again. Only brake side aluminum cover will be dismantled. First they will remove silencer then kick and then the side cover made of aluminium. Changing clutch plates is an easy process but fixing that aluminium cover need some experties to fit it in correct position as it is connected with spring and further connected with kick. After this you will find a huge difference in performance and changing in between gears.