Hi all here is my problem. Riding along yesterday about 100kph in 6th (4000rpm or thereabouts) and all of a sudden the bike made a horrible scream followed by a terrible rattling sound inside the engine. This was followed by the bike stalling as i pulled up to the side road. Got off the bike and inspected as best i could in the situation and there was nothing out of the ordinary. No leaks or loose parts that i could see. The engine restarted but ran very rough and took some throttle/clutch control in order to ride the bike 100m further up the highway to a safe parking area. I have checked the the air-box cover well nuts and they are secure and tight as they should be so i don't think anything has fallen inside from that point. However I'm not the most mechanically minded so any ideas from you guys that i could pass onto my mechanic when he collects the bike from my house tomorrow would be greatly appreciated. This bike was serviced only 2 months ago. It does have 50,000kms on the clock but has had a well maintained life and is as far as i know mechanically sound otherwise...Thanks People!

Could be timing chain tensioner or maybe even failure of big end bearing one.

+1 Timing chain failure.