hello china moto.
i have dirt bike x moto with engine zongshen cb250 zs169mm 2 valvesScreenshot_2016-08-18-14-29-53.jpgScreenshot_2016-08-18-14-30-06.jpgIMG_20160818_142452.jpg
i want a make this engine more powerfull.
somebody know if is possible to swap the cylinder,piston and cylinder head of the engine zongshen cb250 zs170mm 4 valves in my engine?