hi i just bought an 07 wr450 and rode it for the first time on sunday. this is my first 4 stroke and what a difference as compared to a 2 stroke. i was reading some of the free mods guide but am still not sure about them. on the thumperfaq.com page it only referred to the wr250f. i am looking to gain some hp and possible some of the pop the 2 stokes have. thanks for any sugesstions.