The use of motorcycles as an alternative to traditional transportation methods and as a progression from two-wheeled bicycles without motors has increased throughout Africa. Following the governments 2007 decision to zero-rate motorbikes with engines less than 150cc, Kenyas motorcycle taxi business has experienced tremendous growth. The operations of the motorcycle taxi business in the country are characterized by a very high rate of fatal accidents and deaths resulting from road traffic accidents and litigations hence raising questions on the sustainability of the motorcycle taxi business. The study adopted the descriptive research design. Using the systematic random selection method, a sample of 249 motorcycle taxi drivers from a population in Nairobi County was chosen. The study employed primary data that was collected through questionnaires given to motorcycle taxi drivers. A pilot study was carried out to evaluate the validity and reliability of the research tools. To determine the current links between the variables under investigation and the data shown in tables, graphs, and charts, a Multiple Linear Regression analysis was performed. The findings of the study revealed that business support services had a significant influence on the sustainability of Motorcycle Taxi Businesses in Nairobi County. It was recommended that: The government should avail business support services to the motorcycle taxi operators to improve the growth and sustainability of business in the sector and offer subsidies to those who want to engage in the motorcycle taxi business and put strict regulations to control the provision of these services.