I just bought an '03 yz450f. I did all the maintenace that hadn't been done in a while ; oil change , sprockets and chain, brake fluid, greased cables etc etc... I was curious though are these bikes normally really clattery at idle??? Or do I need to do a valve adjustment??? The only other thing that is tripping me out is that whenever I put it in gear and pull in the clutch it chugs me foward... or just stalls I have tried adjusting the cable to fix this but have had no luck any idea???? Currently the cable is almost all the way slack.