I just bought two wiseco piston fot my force 90 (sport jet 90) I was comparing the new pistons with the stock pistons and the stock pistons have two large holes about the size of half a dollar on the skirt, While the wiseco do not.
What are this holes for and do I need to have them. this is a sport Jet 90 engine but, I have been told is the same as the force 90. It's a 1994 engine
What are this holes for and do I need to have them. this is a sport Jet 90 engine but, I have been told is the same as the force 90. It's a 1994 engine