dear umair. I am an onwer of deluxe 2014 model.here in the story. You are driveing bike in 5 gear but no think that bike in 4th gear but when you shift to 5th bike is already in 5th gear you think that there must be a 6th gear you feel bike is heavy to drive.may i right..?????. Rpm and speed is almost same like....rpm 4 speed 40...rpm 5 speed 48. Rpm 6. Speed 57.rpm 7 speed 67. Rpm 8 speed 75 ...rpm 9........ speed..........no speed deluxe hardly touch rpm 9.. may i right????????? If yes then only one solution ....no oil brand change....no hioctane.......no oil mixture.......no spark plug.....only and only.,................. ......... change your sprockets to cg 125 ...... and then you feel that what is deluxe......and enjoy 5 gear.......otherwise you feel lake of power.......choice is yours...