I live in Bermuda where the size of bikes is limited to 150 cc. To get better performance out of my Eliminator 125 I installed a SuperTrapp muffler... hotter plug (NGK 6965 CR6E)... one size larger gas jet in the carb (can´t remember the size; your dealer should be able to advise you) Your bike won´t run well without the correct larger size gas jet... I also drilled a couple of 1 inch holes in the air cleaner box... all to open up the bike´s "breathing." With these easy mods you should experience a dramatic improvement in performance from this hot little bike. Why do you think they called it the Eliminator...?