Well, I just had my 4th ride this past week end on my new 06 450F and I did nothing but wheel spin all day. A buddy of mine is swearing by the Michelin s12's but I am looking for a second opinion. I ride mostly in the woods and hit an occasional gas or power line. I am looking for a tire that obviously wears good (since the factory Dunlop is already shot) and handles tight swirvy stuff. BY the way, I do plan on buying a flywheel weight soon to help aid in the traction department. Thanks!