if u want your bike to really accelerate,, then u would have to get ur engine altered,,, firstly get a bigger and larger piston for ur cylinder and get thicker valves for ur engine head,, a larger weight and change the chain sprockets ((the rear wheel sprocket shuold be of 17 teeths & The front should be of 1 teeth less)) and then u can use high octane fuel for ur bike ((Mix 1/4 Litres of High Octane Fuel With 1.5 litres Of Normal Petrol)) and believe me u will be astonished to see the results
ONE THING MORE=BY DOING THIS U WILL HAVE UR STUFF OF DEATH ---- PLZ IF U RACE WITH THE CUSTOMIZATION I TOLD PLZ WEAR A SAFETY HALMET AND SAFETY PADS