http://www.navero.co.uk/rs125zone/tuning.htm
Use a good quality 100% Synthetic Oil, preferably Silkolene Comp 2+, Motul 600, Castrol TTS or Shell Advance VSX RacingX or M
Change the original spark plug for a better one, for instance an NGK B10EG or B10EG-V
Use 98 octane fuel
Every...