It was broken DRZ

My DRZ, it looks like it was actually broken. I was thinking that engine difficulty and the noisy engine raised the displacement or that the cam was changed outside the company. But recently it is not particularly engines …. And last week I heard the noise from the engine, so what is the reason for this? I started exploring. http://zrx-drz.at.webry.info/200712/article_2.html