x-pro 125cc 4 stroke pit dirt bikes engine motor w/manual transmission kick start x-pro 125cc 4-stroke pit bikes dirt bike engine motor with manual transmission kick start 50cc 70cc 110cc 125cc dirtbikes<br> upgrade a powerful engine for you beloved bike!!!! engine mode: zs154fmi-3<br> engine name: bs125<br> engine type: singlecylinder,4-stroke,air-cooling,horizontal<br> displacement(ml): 123.7<br> dimension(mm*mm*mm): 457x313x352<br> net weight(kg): 23.5<br> max.power(kw.r.min): 6.2.(8500+-5%)<br> max.torque (n.m.r.min): 8.5*(7500+-5%)<br> compression ratio: 9.3: 1<br> bore and stroke(mm*mm): 54*54<br> ignition method: cdi<br> lubrication method: pressure and splash <br> min.fuel consumption(g|kw.h): is equal or lesser than 367<br> starting method: kick<br> clutch method: manual wet multi-plate<br> gearshift method: constant mesh, two stage transmission,4-speed gearshift<br> chosen model: standard model<br> applicable motorcycle type: cub-type motorcycles, cross-country vehicle for children, atv<br>