hey guys a newbie Q...
bought meself a hobao gpx4 pro ... and it comes with the hyper .12 engine which is so damn hard to tune for starters with no low range... and because of that i think it sucks up so much fuel all the time...
i m planning to change it but dunno which is best and easy for starters...
brands have in mind
os
picco

btw i have a question on ports.. wats the meaning of 3/5port engines.. wats the difference???
any1 pls pls tell me.... thnx thnx