banshee exhaust ports

[yamaha banshee]

my banshee exhaust ports where they hook up to my fmf head pipes for a long have had from what looks like gas and oil mixed together that leak out of the front of the pipes is there something wrong such as pipes seals or is that just normal for 2 strokes

[Larry's Shee]

Should be O-rings in there. Might need new ,.