In my search for the perfect dual sport bike I bought a stock '95 XR600R with a Baja Designs kit. I live in So. Oregon and ride the pavement long enough to get to my favorite logging roads. The motor has some miles on it and is a little flat, but still seems to have fairly good compression. I'm a little disappointed that it only lifts the front wheel in 1st and 2nd gear, and 3rd - if I snap the throttle on and pull on the bars with all my might, and that's with 13-48 gearing. I'm considering buying one of the quiet performance mufflers (FMF Powercore Q or Super Trapp IDS2 Quiet Series), a Uni or K&N air fliter, and jetting accordingly. If that didn't give it the snap I want I'm faced with a top-end rebuild, at the least, or a big-bore kit, at the most. All that would cost $500 - $1,000. I wonder if that would be a good investment, or if I should just sell it and buy an XR650R. I checked about 30 pages of postings and could not find any comparisons between the 2 bikes so I'm asking for your comments and advice. In what ways is the 650 better or worse than my 600 for mostly dirt road dual sport riding? I would like a comfortable DS bike that will easily lift the front wheel over a rise in 3rd or 4th gear. Does an unplugged 650 have more punch for wheelies than a fresh 600 with improved breathing? Is the 650 chassis wheelie-friendly or is it a tire spinner? Thanks for the benefit of your experience.