it is use for motorcycle engine modelGY6-125/150strength of extensionstrong(mPa) coefficient of elongation 001(%) ... scooter parts,our part include engine parts(cylinder kit,crankshaft,carburetor,pistonkit,gasket...),electric parts(CDI,ignition coil,relay,horn,lockset...),brake parts ... pls for more infomation. A- GY6-125/150 high quality engine crankshaft