Hello everyone. I have a 2007 Crf450r. This bike stock is amazing but i have better. I put on the Carbon Fmf 4.1 exhaust along with the FMF mega bomb. Along with that the all the way open airbox and the FMF jetting kit. THis made the bike open up and its responce is instant. Have a cutome oil cooler, Rg3 clamps, full suspension upgrade, black excel rims, red hubs, and titanium valves. This bike is extremly fast and has power for getting out of tight turns very quickly and for hill climbing anything you can physically do. The bike is AMAZING! Get one, and you will see.