My WR450 has run pretty flawless so far. I have about 100 miles on it with 50 of that being a two hour hare scramble where I got 2nd in the A class (expert). Point is I rode the bike hard and fast. It is bike #1309 and I haven't touched the flywheel nut. The electric start gets used most of the time. Aside from a couple of hic ups in throttle response on the trail, I have no complaints. You really got an odd situation. Don't compromise on the bike you want. Dealers can buy bikes from other dealers. That's how I got mine. I would try to get your dealer to get you a different WR450 from another dealer. He can fix and then sell the other bike as practically new and probably still come out making money for himself.