This video is on how to install pistons and cylinders using this trick tip method for Harley Davidson v-twin Evolution engine. Similar to procedures are used on S&S TP Ulitma Delkron Jims Revtech and many other aftermarket EVO cases. This demonstration was filmed in the lab at Western Iowa Tech Community College Motorcycle and Powersports Technology Program. If you would like more info on the program feel free to contact the instructor @ 712-274-8733 ext 1204 or email shane.conley@witcc.edu .