Strange Vibrations on 5G at 7K RPM

abhisaxe · March 30th, 2013, 07:57 AM

Dear Friends,

After replacing my CAM chain tension’er recently, I am observing a strange "Humm" and “vibration” coming from the front of my bike in 5th Gear at 7k RPM. The vibration is also felt in the left foot peg only. This ‘Humm’ and ‘vibration’ is sequential in timing and disappears once I cross 8k rpm and are not metallic and seems tht it comes from engine, I suppose. Also, I have noticed this same ‘vibration’ and ‘Humm’ at a smaller scale in 4&3 rd gear at 5K rpm. During bike test on Dyno, this problem didn’t come but driving the bike on road reveals this issue. Mechanic wasn’t able to identify the problem so I am asking you all here if anybody have faced this similar problem, if so then kindly share your experience.

I have tightened my CAM chain still the problem exists. What more should I check for its rectification.

Regards,
Abhishek

Motofool · March 30th, 2013, 08:23 AM

What year is your Ninja 250 and why did you replace that part?

Welcome to the site, Abhishek !!!

abhisaxe · March 30th, 2013, 08:28 AM

Hello Hernan,

Mine is a 2011 model and the need for the replacement is because I was getting a high tickling noise on idling, and sometimes on the run too. So the cam chain tensioner was replaced. Since then only i am having this problem, this isnt a metallic vibration.

Motofool · March 30th, 2013, 09:13 AM

I would check the final drive's chain for excessive slack or wear, as well as the small sprocket.

I would also check the proper torque of the bolts anchoring the engine to the frame.

March 30th, 2013, 07:57 AM	#1
abhisaxe ninjette.org newbie Name: Abhishek Location: India Join Date: Mar 2013 Motorcycle(s): Ninja 250R Posts: 2	Strange Vibrations on 5G at 7K RPM Dear Friends, After replacing my CAM chain tension’er recently, I am observing a strange "Humm" and “vibration” coming from the front of my bike in 5th Gear at 7k RPM. The vibration is also felt in the left foot peg only. This ‘Humm’ and ‘vibration’ is sequential in timing and disappears once I cross 8k rpm and are not metallic and seems tht it comes from engine, I suppose. Also, I have noticed this same ‘vibration’ and ‘Humm’ at a smaller scale in 4&3 rd gear at 5K rpm. During bike test on Dyno, this problem didn’t come but driving the bike on road reveals this issue. Mechanic wasn’t able to identify the problem so I am asking you all here if anybody have faced this similar problem, if so then kindly share your experience. I have tightened my CAM chain still the problem exists. What more should I check for its rectification. Regards, Abhishek

March 30th, 2013, 08:23 AM	#2
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	What year is your Ninja 250 and why did you replace that part? Welcome to the site, Abhishek !!! __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

March 30th, 2013, 09:13 AM	#4
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	I would check the final drive's chain for excessive slack or wear, as well as the small sprocket. I would also check the proper torque of the bolts anchoring the engine to the frame. __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Just cleaned carbs - now stuttering at low RPM, fine at high RPM	Ohio	2008 - 2012 Ninja 250R Tech Talk	20	August 5th, 2014 10:30 PM
Strange Noise at ~6000 RPM	forevertwowheels	2008 - 2012 Ninja 250R Tech Talk	20	August 20th, 2012 06:15 AM
7k+ rpm makes strange noise	Graugaard	2008 - 2012 Ninja 250R Tech Talk	14	June 11th, 2012 03:30 PM
Got handlebar vibrations?	sofo	General Motorcycling Discussion	15	August 18th, 2010 09:14 PM
HELP: Heavy vibrations!	sixstring	2008 - 2012 Ninja 250R Tech Talk	16	April 16th, 2010 03:10 PM

March 30th, 2013, 08:28 AM	#3
abhisaxe ninjette.org newbie Name: Abhishek Location: India Join Date: Mar 2013 Motorcycle(s): Ninja 250R Posts: 2	Hello Hernan, Mine is a 2011 model and the need for the replacement is because I was getting a high tickling noise on idling, and sometimes on the run too. So the cam chain tensioner was replaced. Since then only i am having this problem, this isnt a metallic vibration.