Abstract This project deals with the design and implementation of an automated system for detecting problems in Bajaj motorcycle is very friendly software. You can detect problems in your Bajaj motorcycle at anytime. The consultant identifies specific Bajaj motorcycle spare parts likely to be responsible for an observed fault and offers a brief explanation of the major factors and evidence supporting these indictments. The consultant, called dart, was constructed using hmycin, and is part of a larger research effort investigating automated diagnosis of machine faults. In present time most households own at least one motorcycle machine. This figure shows that a Bajaj motorcycle is very important to people’s lives as it completes the cycle of living. This computer expert system is hoped to help those who are in need of guides to deal with their Bajaj motorcycle problems. Although it might not give a complete guide and help as a human expert, namely mechanics, at least the expert system can give temporary assistance to those who are in need of instant help, as a result of the limitation of time and distance. With the help of a motorcycle machine like Bajaj, movement from one place to another has been made easy especially for those who are always mobile in their jobs.