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Old August 5th, 2010, 08:58 PM   #1
manorat member
Name: Jeremy
Location: New York and Rhode Island
Join Date: Jul 2010

Motorcycle(s): 2007 Ninja 250

Posts: 15
Metal Shavings in Oil, Bad Cam Chain Tensioner?

So, I've written about this in another thread, but I think i've gotten to a new point in this problem that the subject line needs to change. So here it goes. My '07 250 w/ 7200 miles just got put on the road 2 days ago. After taking it for a ride I noticed an occasional grinding sound. The kind of sound that makes you shut the engine off immediately (out of fear). As suggested in my last thread I checked to see the condition of the oil to see if there was any signs of debris in the engine case. Sure enough there were TONS of particles and shavings, mostly very very fine. I did however find just one tiny semi-circular shaving (idk if that means anything to anyone). The cam chain tensioner was suggested as a possible problem. I pulled it just now, and everything looks to be intact. How exactly do you know if the tensioner is shot, looks to me like nothing could go wrong? What gets replaced? Is it the whole assembly? Has anyone else out there had metal in their oil? What did it turn out to be?


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Old August 7th, 2010, 12:21 AM   #2
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Name: Cory
Location: Glendale, AZ
Join Date: Mar 2010

Motorcycle(s): 2007 Ninja 250R

Posts: 22
What services have you had done to it? This sounds like it could be multiple problems, anything from your cams not getting proper lubrication, or your trany. This is what i would like you to do, start the bike up and listin to the noise. Get close the loudest point and see where it is. The chain tensioner could be the problem being to tight or way to loose. If it is a grinding noise it might be in your trany. The cam chain would be making a ticking noise (loose or tight). what you can do for now is pull your valve cover and check you chain and cam for any wear or signs of heat damage, it will be very noticable. If that isnt the problem its time to start going down the list of posible problems.
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