I just finished up a oil change on the 450 and I noticed the exhaust pipe glowing a dull orange as the bike was at idle after a minute. Not to sure if this is normal or not. I have not riden the bike much at night so I dont know if this has happened before. I just moved from Wyoming at 5000ft. to Washington 1800ft. so I could be just running lean. I am new to this site and thanks for any help.