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Discussion Starter · #1 · (Edited)
Hello!

My bike is a 2012 CBR250R (non-abs) I purchased used about 4 weeks ago. Odometer reads ~12k miles. I'm unsure of service history, but I have changed all fluids, air filter, tires, and most recently Front/Rear sprockets and Chain.

I have not noticed the sounds until today, my first ride after the new sprockets and chain. Tension is within spec on the chain and alignment looks good (both tension indicators on swing-arm, measured from pivot bolt to axle, and using an alignment tool). I have included a video to help (you can hear it especially in I move my head to face the tank area. It does not make the sound with the clutch lever is engaged, coasting, or revving the engine. I can only reproduce the noise while riding above 6k+ ish RPM. I suspect it could be vibration from the front sprocket? I am unsure, would love to hear the experts' thoughts! I have heard the stock front sprocket has a rubber damper, but the new one did not come with one, I suspect this could be the reason.

Thanks you!

Here is the clip:
 

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Discussion Starter · #3 ·
I think I've discovered the issue...one of the three bolts for the middle/side fairings has a shoulder to it...they were incorrectly installed on the lower/ground level...that helped a bit with noise. I also discovered one of the 7mm push rivets that connects inside of the left fairing was missing. I have replacement on the way. I imagine this could very likely be the culprit!
 

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Honda: INNOVA125i(2010); CBR250R(2013)
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Tht sound resolved or not bro. My bike also same sound coming
Hi
The guy who started the thread wrote a comment and after a month left the forum.
In my opinion, you should disable the motorcycle and bring it with a tow to a qualified mechanic. These kinds of noises tell us that something is hitting something, and to me it doesn't sound like noises that are typical of a loose or broken plastic cover. The guy changed the chain, maybe he also changed the oil, and oil filter, and then accidentally installed the oil filter upside down (and destroyed the engine)??? The test he was doing with the clutch tells us that the clicks are not coming from the chain he replaced, which continues to rotate when the clutch is pressed, because the motorcycle is in motion, but the noises stop. And according to the video, the noises return when the throttle is opened, and the noises increase when the rpm increases. I was under the impression that a decrease in power must also be there, because the engine sounds "choked" to me, but that is not the point. The point is noises of the type that require to stop riding and get inspection by a qualified mechanic. You must go to a mechanic With a tow, and I'd love to know if I'm wrong. We'd appreciate it if you could let us know what your mechanic said.
 
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