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June 1st, 2018, 01:50 PM   #1
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Joined: Mar 2017
From: Norway

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I Ride: Husaberg FS 570 2011
Strange engine sound?

Hi everyone!

I have an Husaberg FS 570 2011 and hope you guys can help me either calm down or find out what's wrong.

I'm using the bike daily to and from work and in recent days I have noticed a strange "noise" in the engine, especially when the engine is cold and at deceleration. In my ears, it sounds like some loose chain or something .. but i'm no mechanic ..

I have added two videos where I hope you hear the same as me.

Cylinder, piston, bearing kit, oil pumps, cam chain, oil and filter were changed at 248.2 hours / 14745km the bikes now has 327 hours on it and 19677km. Oil and filter has been changed every 10 hours.

My best guess would be cam chain tensioner? (hopefully)

Link 1:
Link 2:
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June 4th, 2018, 02:45 AM   #2
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I Ride: 1 Berg, 1 Zook
Having trouble seeing the videos on my machine right now, but based on the description, Yes!, I would assume it's the cam chain / tensioner. At least start there.

One way to kind of know what's going on is to get a manual tensioner. They are arguably more fuss, but after having replaced my DRZ's clockwork tensioner with a manual bolt-and-locknut one, I'm not going back. You get an external indicator of camchain slack which is fine-adjustable by feel. It is imo the correct thing for motors such as these which already reward mechanical intimacy.
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