Hello guys! My first post on the forum:banana: I bought recently KTM 530 exc 2009. Bike have around 160 hours on and was ridden until now hard (also on some of the hardest competitions). My question! When is a proprer time to make a big maintenance on the engine? Until now, there was no major maintanance on the bike done (of course all the regular maintenance was done and I had valve adjustement done just now). Do I wait until something goes wrong? Some guys sais, that on such a big bore engine, until 300 hours, there is no need to make big maintenance on engine. On the other hand, official macanics sais, that it is time to do it (or that I could make another season - recreational; which I will do, since I am not a racer - definitly a weekend rider). Of course for the macanics it is business, but nevertheless, what are yours opinions on it? If everythink works, leave it alons for another season....... or???