project zuma : 70cc big bore kit and more

adding a big bore kit can seem daunting. but with the right parts your scooter can become something quite special in terms of performance. entire setup as of recording. athena hyper race. polini r race. amazon pwk 24mm carb, 38 pilot 115 main jet. br8hs plug. top performances variator with 3.5 and 4.1 gram rollers mixed. polini 3g clutch and koso/stage6 wing bell 14:42 gears. kn planning intake (two sizes available for it) v force reed setup. #scooter #70cc #scootering #scootertuning #yamaha #bws #fyp