Mystery Noise at 4800 RPM?

jnninja250r · May 4th, 2012, 10:21 PM

A couple of days ago, my 09 250R began making a strange noise. It sounds almost like a faint grinding metal on metal. I first checked the pads, and all was well. So I've been trying to track it down since. So far I've determined the noise only occurs right around 4800RPM. I can hear it at 4800 RPM in all gears, but I can not hear it in neutral. Has anyone had a similar issue or have any ideas?

Thanks!

alex.s · May 5th, 2012, 01:13 AM

earplugs

jnninja250r · May 6th, 2012, 03:49 PM

Quote:

Originally Posted by alex.s

earplugs

If it hadn't began so suddenly then that would probably be the solution. As its only a certain RPM, I'm hoping its just resonance of a loose part or something. I'm planning to change the oil and put on a new right fairing tomorrow, so I'll have a chance to look everything over really good.

DaBlue1 · May 6th, 2012, 04:02 PM

The Ninja is a noisy bike with a lot of sounds being "normal sounds" Sounds can be described differently by everyone. A video clip of the sound may help determine what it might be.

edxmon · May 6th, 2012, 04:51 PM

check the pin that hold both passenger foot rests. After chopping my fender yesterday and checking that everything turned on correctly I noticed that one of those pins and C clip is loose. It doesn't grind as you describe it but it's a somewhat high pitch metallic rattling noise.

alex.s · May 6th, 2012, 08:39 PM

the levers vibrate at certain rpms. my keys also vibrate at certain rpms. recheck the torque on all the bolts on the bike and make sure nothings falling off, then put in some earplugs.

jnninja250r · May 11th, 2012, 09:57 PM

Quote:

Originally Posted by alex.s

the levers vibrate at certain rpms. my keys also vibrate at certain rpms. recheck the torque on all the bolts on the bike and make sure nothings falling off, then put in some earplugs.

Did the service, looked everything over. Definitely not the levers. Its much higher pitched than the lever noise. Perhaps Ive just never noticed it. Ear plugs may be the answer afterall

I'll be sure to update the thread if I can get a good recording of the noise. Perhaps this is a good excuse to buy a gopro or contour camera...

May 4th, 2012, 10:21 PM	#1
jnninja250r Qtr Ltr Name: Jeremy Location: Lincoln, Nebraska Join Date: Aug 2010 Motorcycle(s): 2009 Ninja 250R SE Posts: 64	Mystery Noise at 4800 RPM? A couple of days ago, my 09 250R began making a strange noise. It sounds almost like a faint grinding metal on metal. I first checked the pads, and all was well. So I've been trying to track it down since. So far I've determined the noise only occurs right around 4800RPM. I can hear it at 4800 RPM in all gears, but I can not hear it in neutral. Has anyone had a similar issue or have any ideas? Thanks!

May 5th, 2012, 01:13 AM	#2
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	earplugs __________________________________________________

May 6th, 2012, 04:51 PM	#5
edxmon ninjette.org guru Name: Ed Location: San Diego Join Date: Mar 2012 Motorcycle(s): '08 Ninja 250R (SOLD - 2/16/2013) Posts: 492	check the pin that hold both passenger foot rests. After chopping my fender yesterday and checking that everything turned on correctly I noticed that one of those pins and C clip is loose. It doesn't grind as you describe it but it's a somewhat high pitch metallic rattling noise. __________________________________________________ Mods/Add-on list: DanMoto Jisu, Snorkel delete, Shimmed needles, K&N Drop-In filter, T-Rex frame sliders, Shogun swing-arm spools, CBR250 Rear Hugger, Buell XB Pegs. DIY polished rim lips

May 6th, 2012, 08:39 PM	#6
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	the levers vibrate at certain rpms. my keys also vibrate at certain rpms. recheck the torque on all the bolts on the bike and make sure nothings falling off, then put in some earplugs. __________________________________________________

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May 6th, 2012, 04:02 PM	#4
DaBlue1 Long Time Rider Name: Blue Location: Charlotte, NC Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	The Ninja is a noisy bike with a lot of sounds being "normal sounds" Sounds can be described differently by everyone. A video clip of the sound may help determine what it might be.