I just got a quick ? I have a '91 formula mx that will soon be in need of a new track. I was looking through royal distributing cataloge and it says that my track should be a 16" wide track with a 2.52 pitch 121" long. It says where the part # should be that it takes a type 121 track but all the type 121 tracks are only 15" wide (same pitch). Now my ? is will these tracks fit?