Me neither thought i remember PO saying MAC ... the two center tubes cross , then a clean 4-2 set up. After the i went through the carbs the pipes gave a bit of a tune issue, but i dropped the needles down one position and that cleared things up nicely. Its going to be torn down when the season is over, hopefully that means into Novemeber for me. I really have not been able to stay off it, sounds great, pulls hard, its no scooter like some might think. Just changed my own tire too with no drama, as some might have you belive, static balance and all. I may start a build thread. But to do it right I may post when I am done, once I start I dont like taking too many breaks that dont involve wrenching. And I will repost the pipes maybe someone can tell me what they are, it will help me with getting the tuning spot on. Thanks- everyone here has been very helpful!