I maybe selling my engine for the simple fact i want a runner 172 . My engine has done about 500 miles its quick. cost me about 6/700 specs of my engine are : Polini Corsa 70cc kit Polini Variator Polini Kevlar Belt Polini Rollers 5G Mixed with 8.0G Polini Evo Clutch Polini Contra Spring Stage 6 HPC crankshaft Stage 6 Bearings Stage 6 Manual Choke Cable BGM/Dellorto 21MM Carburetor Pm Tuning 71 Exhaust Pipe Malossi Mhr(rep) Reedblock 125 Inlet Manifold Offers or swop for 125/172 ?