Hello everyone.

I'm new to the forum. Although i've been reading the forum for a while.

I have GS500 -02 that I bought last summer. The engine itself broke down totally. It was actually broken already when I bought it. I just didn't know that.

Anyway I bought a used engine from a crash bike and installed it. The used engine had about 30 000km on it ( around 19 000 miles). I drove the bike with the new engine roughly 100 km. During that time I noticed that the engine makes a tick sound. It feels like the sound is coming from the left side and from the cylinder head. At least that is my estimate. I haven't yet tried to put a screwdriver to the engine and listen.

Can you help me with this sound? Does it have something to do with the valves, chain or exhaust leak? By the way. The bike has got aftermarket muffler installed.

Below is a video of the bike just when i have started it. When the bike is cold the sound is normal and sweet. No ticking sound. In the beginning of the video I adjust the choke but the RPMs are still higher than regular idle, maybe 2000 rpm.

https://www.youtube.com/watch?v=zEvZcIesETk

On this second video you can clearly hear the ticking sound when the bike idles. After the engine has warmed a bit the ticking starts. The ticking don't go away with revs. It stays there through the whole RPM range. I can hear it while I'm driving. The bike runs fine, no loss of power or anything.
There is also another sound on the video but that is just cam play.

https://www.youtube.com/watch?v=9m6rbMbfxUE


I have checked valve clearances and they seem to be ok. I have to double check again to make sure. The cam chain seemed tight but I haven't checked the chain tensioner. Any ideas where to start looking? Oil level is fine and I just changed the oil when i installed this engine. I am planning to check valve clearances and the chain tensioner. If no help from that then I take the exhaust off and start the bike to see if that was only exhaust leak. If nothing else helps I have to take the head off. I'm just afraid that when I take the head off there is nothing that would indicate this problem and I have to start guessing what is causing that noise.

Anybody?

On second video I only hear a series of taps right at the beginning - is that the sound you're concerned about ?

My experience : strange noise, various attempts to track it down, removing head, inspecting valves/seats/stems, cct, cam chain tensioner etc.  never figured it out, just a big fat waste of time, probably a bearing ?  or maybe exhaust leak ?  Still runs fine, so I'm just going to ride it 'til it breaks, or sell it with full disclosure.

Hi, the taps are cam play I think. That is normal but if you compare the second video to the first one there is a clear metallic "ting ting" sound coming from the engine. My suspicion is that it is not a bearing making that sound.

The sound difference is huge compared to cold and warm (vid 1 and vid 2). I think there is definitely something wrong. I have to check it out. I don't want to drive a bike if I am not certain that it works as it might just seize at high speed or in a curve. That can have bad results to my health 

Hey. Did you find out what was that? Because i have the exactly same noise like yours. When it's cold sounds sweet, but when it's warm ticking just like yours and idle. Many thanks.

Or anyone have any idea what is this?

Anybody?