Some may think I'm crazy (fast guys mostly), but I seem to feel a little more comfortable on the '03. All in all I like my '04 better, but... I just rode them back to back again last week and the things that stood out were: 1. Front end felt easier to control (while trying to wheelie over square edge bumps). 2. '04 seems to have more wheel spin (new tire on 04 and clapped out tire on 03). 3. '03 wound out quicker in 3rd gear, but could carry 3rd into turns that '04 required 2nd into turn and quick shift while exiting. 4. '04 has a harsher hit than the '03. Felt like I could ride longer on the '03. '04 is bone stock except twinwalls and '03 has Yosh pipe, Tag triple clamps/bars, heavier springs front and rear (I'm 220lbs). Stock gearing on both bikes. I'm going to test 49 and 50 tooth sprocket, then see if I feel a flywheel weight is needed. Any input?