Motorcycle Front Sprocket Gear For Yamaha XJ600S XJ600N XJR400R 1992-2008 Work for Fit For Yamaha XJ600 XJR400 street motorcycle front drive shaft assembly with 520 chain pitch 15 tooth spline size for direct mounting without or conversion accessories treated structure delivers outstanding hardness wear resistance for daily city highway riding machined tooth profile prevents chain skipping cuts abnormal transmission noise Complies with OEM dimensional standards to fit output shaft tightly without loose clearance during acceleration