got a 125cc loncin engine want to upgrade it where to start and what to start with ?

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pommie

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hey got a 125cc loncin engine wanna upgrade it so it goes a bit harder and faster what racing cam and gearbox would be best thanks let me know ppl thank pommie
 
basic mods are all id be spending money on..

larger exhaust or better muffler (if needed)
larger carby

anything more than that and you may as well buy a 140 or 155/160
 

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