ok i just got my yz450f yesterday rode it and broke it in yesterday just putted around today i rode for awhile and when it got hot it was so hard to start even with the hot start is it just cuz its new? and is it ok to ride it at like 3/4 trottle for awhile in 5th? just wondering. the last bike i had was a 96 rm 250 and it was way different. and how long is the break in period? cuz the dealership said 20 hours and my manuel said 15 mins lol. any advice etc would be great thanks. o and its a hell of a bike lol.