i just bought my 450r not even a month ago and its giving me nothing but problems. everything from missing, boggs, back fires, and sometimes if u even touch the throttle while its ideling it kills it. also i havent even touched it yet, no exhaust, filter, cam, etc... bone stock except taking the fact. end cap off(which is nothing ) the dealer told me to change the plug b/c its prob fouled. so i took it out(was pitch black and threw a new iridium in.) ran fine for an hour or so and started doin it again.so i took it back. havent heard back yet from the dealer and its been a week. any1 else have these probs or know what it could be. im gettin fed up with my R but im not giving up yet.