New to the site. Need help! I hava a 2003 wr450 with about 50 hours on it. The first time i took it out it broke down due to the woodruff key shearing and was repaired under warranty. The update for the problem was to torque the flywheel(rotor)nut to 61 lbs and use locktite. It happened to me again only this time it also broke the engine side cover when it backfired because it again was out of timing with the ignition. Do I need to sell this bike because it has become unrelaible or is there a legitimate fix for this problem? (I had to abandon the bike in Jawbone in the woods and hike out for 5 hours, order parts, and retreive the bike a week later! Does anyone have any input?