Hey guys... i want to buy Aprilia SR125+ but what is better.. to tuning the stock engine 172cc kit + auspuff, variator, clutch and etc. or to buy a engine from Runner ??? Aprilia_leonardo-bg say that is better to buy a runner 180 engine and swap.. ?? and if i swap.. what to surch for.. SR50 or 125+ ?

sr 125/150 with 172 malossi and 25mm dellorto is faster and stronger than runner 172 malossi and 25 dellorto... why?

no rev limiter, lighter, and there is no water pump on cranckshaft so it turns easier...

i think there is Runner AC engines.. ??? they dont have watar pump too... :/

never heard of runner AC...


and yes... sr 125/150 has block that has mounting holes for brake calipers... so if you wanna upgrade to rear deisc its all plug n play

Lol...some older models of Runner are AC, there is one in my city, in great shape too...i will photograph him and post the picture so you will see.

there could be a runner 50 AC, cause there is nrg mc2-3 AC, but they are not imported in croatia, a saw few of them, from some guests who came here