[Huntray]

Hello! First post and first chinese ride! I recently tried to upgrade my stock 428-15tooth front sprocket with a 428-17tooth front sprocket but the center shaft size on the new 17t sprocket was too small to fit on the shaft. Anyone know what size center I would need on a 17t? I guess i just ordered one i saw someone put on their 125cc. Are they not the same size?