I'm replacing the top end on my bike and I pretty much have everything figured out except this one thing I'm a little unsure about. The directions for the new Wiseco piston say if the cylinder has an exhaust bridge you have to drill holes in the piston skirt. I'm a little nervous about drilling into my brand new piston and I'm unsure if I need to because the OEM piston did not have these holes. I assume the exhaust bridge is the narrow piece in the center of the port right? Advice would be appreciated as this is my first time and I REALLY don't want to mess this up!