I am going to buy stock 04 R1 and since i am new to the cycle world, naturally i have alot of questions. I want to boost HP so i am thinkin of adding a K&N filter, full yoshi, and possibly a programmer. How will these things affect MPG and HP (numbers if possible)? Are they the right steps for more power or are there better mods i should do first. I have ridden ATV's for years so that's what i am basing my assumptions on. Also will my R1 act like a 4-stroke or a 2-stroke...or both? By that i mean does it pull easily through the bottom end or is it all top end?