Last year I bought a used 06 450r. The guy who I bought it from rode motorcross but just had a kid and never rode the bike. It had brand new stock everything and not a scratch on the plastics. I just got back into riding after 8 yrs. and many people told me to go with the r instead of the x. A year later I'm not sure if it was the right decision. I've read the posts and done the following modifications - heavier flywheel - took rear sprocket up from 48 to 51 - rekluse z start clutch with perch adjuster The bike seems to be getting more woods friendly and I know I need more ride time but I'm still stalling at low rpm's in tight areas. My first gear feels like second which makes things tough in trials like trails. And I'm not sure if the previous owner did anything with the jetting. I need some help!!