I have a bandit 1590 xp with a 125 horsepower cat diesel. the engine has over 5,000 hours on it but runs very strong and starts right up. I noticed at the end of the day when i was shutting her down, i idled down released the clutch and let it idle for a minute or two . I noticed a slight smoke which looked to be more white than black. It wasn't real thick white smoke , just enough to tell it wasn't black. Is this something to be concerned about? Things i should check? thanks in advance