K. Simhadri. “Experimental Investigation on Performance Characteristics of Four Stroke SI Engines of 150 Cc and 180 Cc With Pre-Heating Set-Up and Without Pre-Heating Set Up”. Design Engineering (November 24, 2021): 16429-16436. Accessed May 4, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/6785.