Does a KX60 have an exhaust bridge?

[rabbithounds]

Just got a Wiseco M Series Piston. The instructions say to drill some lubrication holes if the engine has an exhaust bridge. What's an exhaust bridge? Does a KX 60 have one?
Thanks in advance for helping me out!

 

[76GMC1500]

If there are more than one exhaust ports, the sections of cylinders that devide the ports would be considered exhaust bridges. Drill holes in the piston where it rides on these portions of the cylinder. This isn't as important on engine with 3 exhaust ports vs. the 2 with a bridge, but the extra cooling/lube never hurts.