HY im tony from croatia i have futuru 5 months with polini kit arows etchaust and delorto carburator i drive like hell with normal part about 2 months(with 3000km worked) and in one moment in the corner on 155km/s my motor is blowed than i give polini arows and delorto new all for best tuned and put in 2% oil (valvoline 2t racing sport) after 2000 km i start drive like hell of that time is pased 5 months and i still driveing i heart and i know from my excample to the polini parts is better than aprilia orginal wromm bip bip biphhhhhhhhhhhhhhh