April 11th, 2017, 08:42 AM | #1 |
One ugly son of a gun.
Name: Andrew
Location: Raleigh, NC
Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167
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Buzzing on decel
Is this normal? My engine seems to have a pretty distinct buzz on deceleration, mostly on higher rpms. Wondered if this was normal or some sign that a bearing is going to give out or something. My engine only has 3k miles on it-
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April 11th, 2017, 08:44 AM | #2 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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Are you sure it's the engine? My 250 has a couple minor buzzes at different speeds. One is the headlight shell vibrating.
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April 11th, 2017, 09:46 AM | #3 |
One ugly son of a gun.
Name: Andrew
Location: Raleigh, NC
Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167
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It kind of feels like its coming from the engine, but I suppose it could be elsewhere. I have all my plastic off right now and it's still there, but the headlight shell is still on. How would I go about finding out?
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April 11th, 2017, 10:54 AM | #4 | |
Rev Limiter
Name: Jay
Location: WI
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Quote:
Considering you have the fairings off, it should be a lot easier to locate. You may be able to slowly rev-up the engine and see if you can get the same frequency as you did on decel to recreate the buzzing in the garage. |
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April 11th, 2017, 11:07 AM | #5 |
Guy Who Enjoys Riding
Name: Jim
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Yeah, about all you can do is try feeling around when it's happening and see if pushing on different things stops it, all while trying to avoid running into a tree or something.
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April 11th, 2017, 11:27 AM | #6 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
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Clutch lever?
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April 11th, 2017, 12:36 PM | #7 |
cadd cadd cadd
Name: Cadd
Location: 41°21'13.1"N, 74°41'37.4"W
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Video will be really helpful in situations like this.
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April 11th, 2017, 12:57 PM | #8 | ||
One ugly son of a gun.
Name: Andrew
Location: Raleigh, NC
Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167
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Quote:
Quote:
Do you mean the clutch lever is vibrating? I dont think so, my hand is on it- I would know. Now that you mention it, though, it seems like I'm only noticing it while I'm decelling in gear. If I pull the clutch, I dont think I notice it. I would do this, but I dont think you'd hear it on the video. My new exhaust kind of drowns out the sound, but I can still feel it in the handlebars, my butt and the foot pegs. |
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April 11th, 2017, 02:34 PM | #9 |
Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
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If the chain is excessively loose, the top of it could be hitting the swingarm when the rear wheel is forcing the engine to rev up.
If not, I would verify torque of the three bolts and nuts clamping the engine against the frame.
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April 11th, 2017, 03:33 PM | #10 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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April 11th, 2017, 03:36 PM | #11 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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What kind of condition is your chain in?
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April 11th, 2017, 04:15 PM | #12 |
ninjette.org member
Name: Rob
Location: Winnipeg
Join Date: Oct 2014 Motorcycle(s): 2003 ZX12R (sold), 2012 250R, 1975 Honda XL250, 1980 XJ650 Posts: 99
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April 11th, 2017, 04:24 PM | #13 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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April 11th, 2017, 04:52 PM | #14 |
ninjette.org member
Name: Rob
Location: Winnipeg
Join Date: Oct 2014 Motorcycle(s): 2003 ZX12R (sold), 2012 250R, 1975 Honda XL250, 1980 XJ650 Posts: 99
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I found that out after a 1200km trip one day. For longer trips I bring my can of spray with me.
Moral of the story: Always take lube with you on trips My bike also had a buzzy front fender at certain rpms from vibrating against the metal bracket underneath. Little bit of foam fixed that. My front brake hose does make a noise as well in the retainer only on suspension oscillation. You can quickley rule out the chain if you go for a ride and pull the clutch in and let the rpms drop. If the buzz is gone, then you are looking at engine/rpm related. |
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April 12th, 2017, 09:36 AM | #15 | |
One ugly son of a gun.
Name: Andrew
Location: Raleigh, NC
Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167
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Quote:
This is a good point- I do need to tighten my chain- probably lube it too. I double checked this. When I pull the clutch, the vibe is still there. Seems to be engine/rpm related. |
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April 12th, 2017, 11:17 AM | #16 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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April 12th, 2017, 12:48 PM | #17 |
One ugly son of a gun.
Name: Andrew
Location: Raleigh, NC
Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167
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Sorry- I wasnt clear in my response. When I pull the clutch, the vibration WAS still there but related to engine in the sense that once the RPMs dropped it went away. Regardless... it was the chain after all. Didn't realize it was as loose as it was. I was outside looking at it and when I push it up from underneath, it actually could touch the swingarm. I tightened the chain and the vibration is gone. Thanks for the good tips, guys! I still need to go over my engine mount bolts- even though I fixed the problem, they could still use a check.
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April 12th, 2017, 07:40 PM | #18 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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Looks like DmbShn41 gets the win.
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April 12th, 2017, 08:31 PM | #19 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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Yes, he does. I guess I'm not ashamed to say that I don't have experience with a loose chain causing odd noises. Andrew, I'm glad you found the problem!
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April 13th, 2017, 07:09 AM | #20 |
One ugly son of a gun.
Name: Andrew
Location: Raleigh, NC
Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167
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