Found my vibration - Wrist Twisters
 
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post #1 of 22 Old 04-29-2016, 06:45 PM Thread Starter
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Found my vibration

I've noticed my niner has been more buzzy than I remember for sometime now but have just been ignoring it. I figured I had a broken exhaust bracket but put off checking since there was always something else to do and it was still rideable. So today I decided I put off long enough and dug into it, here's what I found.
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post #2 of 22 Old 04-29-2016, 06:47 PM Thread Starter
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Since the bike will be down till I get it fixed I might get some of the other stuff I've been putting off done.



Or I'll go ride the ZX9R.

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post #3 of 22 Old 04-29-2016, 07:56 PM Thread Starter
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Decided to check a few other thing and found my air filter like this! My bike is parked in a heated garage year round and never left outside so I'm wondering how this happened.
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post #4 of 22 Old 04-30-2016, 06:50 AM
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My first 919 exhaust mount broke the same way. I just ignored it and rode it anyways. I bet the air filter became the home of some kind of critter. Most likely, a mouse.

Spoiler:

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post #5 of 22 Old 04-30-2016, 05:13 PM
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Whats in your filter? Bird feed?

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post #6 of 22 Old 04-30-2016, 06:08 PM Thread Starter
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Bird feed and a couple large peanuts. Lol
There's no sign of mice in my garage so I'm not sure how or when it got in there!

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post #7 of 22 Old 05-04-2016, 06:58 PM Thread Starter
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So I got my exhaust fixed and reinstalled but now I have found another vibration. It's a very minor vibration but becomes very noticeable at 80mph. It will start to put my hands to sleep in 5-10 minutes and doesn't seem to come from any specific spot. I can feel it in the bars and seat but feel nothing in the foot pegs. I gave the bike a once over and nothing's loose or missing but I did find that my front sprocket doesn't look the best. Can a wore sprocket cause a vibration like this?

Here's the front sprocket
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post #8 of 22 Old 05-04-2016, 06:59 PM Thread Starter
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And here's the rear sprocket
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post #9 of 22 Old 05-05-2016, 03:17 PM
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Quote:
Originally Posted by firedave View Post
So I got my exhaust fixed and reinstalled but now I have found another vibration. It's a very minor vibration but becomes very noticeable at 80mph. It will start to put my hands to sleep in 5-10 minutes and doesn't seem to come from any specific spot. I can feel it in the bars and seat but feel nothing in the foot pegs. I gave the bike a once over and nothing's loose or missing but I did find that my front sprocket doesn't look the best. Can a wore sprocket cause a vibration like this?

Here's the front sprocket
It's typical of the 919 to have these vibes since the motor is part of the frame by design. I installed some Vibranators in my Renthals and it helped a lot but it's still there. Other things that may help is using proper body position instead of leaning on yours arms and the type of gloves can also factor in if they are cutting circulation. I'm sure some will argue that the condition , age , type of , and pressure of the tires along with road conditions also factor in. One other remedy is to change the stock gearing to 17/43 to get rid of some of the highway "buzz" . LDH sells these kits. Might not be a bad idea since yours are ready for replacement. Hope this helps.

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post #10 of 22 Old 05-05-2016, 05:45 PM
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Quote:
Originally Posted by firedave View Post
Decided to check a few other thing and found my air filter like this! My bike is parked in a heated garage year round and never left outside so I'm wondering how this happened.
I had the same exact thing happen to my filter a few years back!!! I have no idea how it that stuff got in there as mine was parked inside as well.

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post #11 of 22 Old 05-06-2016, 05:50 AM Thread Starter
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Quote:
Originally Posted by redline919 View Post
It's typical of the 919 to have these vibes since the motor is part of the frame by design. I installed some Vibranators in my Renthals and it helped a lot but it's still there. Other things that may help is using proper body position instead of leaning on yours arms and the type of gloves can also factor in if they are cutting circulation. I'm sure some will argue that the condition , age , type of , and pressure of the tires along with road conditions also factor in. One other remedy is to change the stock gearing to 17/43 to get rid of some of the highway "buzz" . LDH sells these kits. Might not be a bad idea since yours are ready for replacement. Hope this helps.
I don't think it's a normal vibe as I always remember it being smoother at this speed but it has been 6 months since I've rode it so maybe I'm not remembering it right. I'm also running the 520 17/44 set up that LDH sells but I'm thinking its time to replace it as I've found a few stiff links in the chain and am leaning to this contributing to the vibrations but I won't know for sure until I replace it.

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post #12 of 22 Old 05-06-2016, 08:14 AM
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Quote:
Originally Posted by firedave View Post
I don't think it's a normal vibe as I always remember it being smoother at this speed but it has been 6 months since I've rode it so maybe I'm not remembering it right. I'm also running the 520 17/44 set up that LDH sells but I'm thinking its time to replace it as I've found a few stiff links in the chain and am leaning to this contributing to the vibrations but I won't know for sure until I replace it.
You may want to check wheel bearings and also see if have any wheel balancing weights.

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post #13 of 22 Old 05-31-2016, 09:08 AM Thread Starter
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Well I have new wheel bearings and seals front and rear and finished installing my new chain and sprockets. The new sprockets are really sexy compared to the old ones even though they are just a hair heavier.
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post #14 of 22 Old 05-31-2016, 09:08 AM Thread Starter
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post #15 of 22 Old 05-31-2016, 11:40 AM
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How the heck do you people keep your bikes so clean??????


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post #16 of 22 Old 05-31-2016, 05:51 PM
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How the heck do you people keep your bikes so clean??????
3:1 ratio. 3x cleaning/admiring : 1x riding

I have no idea, I put mine away wet and dirty.

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post #17 of 22 Old 05-31-2016, 05:55 PM
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3:1 ratio. 3x cleaning/admiring : 1x riding

I have no idea, I put mine away wet and dirty.
Same here lol.

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post #18 of 22 Old 06-01-2016, 03:48 AM
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Quote:
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.....and finished installing my new chain and sprockets.
Was this pic taken prior to finishing? That chain looks a little loose

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post #19 of 22 Old 06-01-2016, 05:58 AM Thread Starter
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Was this pic taken prior to finishing? That chain looks a little loose
You bet. It got tightened up after I took it off the stand

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post #20 of 22 Old 06-01-2016, 06:01 AM Thread Starter
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Quote:
Originally Posted by voodooridr View Post
How the heck do you people keep your bikes so clean??????
I usually wash mine before I put them away for the winter. Since I've been really trying to fix my vibration issue this spring the niner haven't been used to much.

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post #21 of 22 Old 06-01-2016, 06:09 AM Thread Starter
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So I took the bike out last night and everything felt great up until I got to about 70mph. Around that speed and higher there is a vibration that gets faster or slower with the speed of the bike and doesn't change when the clutch is pulled in. It almost feels like a separated belt in a car tire, kind of like a thudding vibration but not super harsh just enough that you know it's there. I running Dyna beads and my rear tire is just about done but the front has some life left in it. Could my tires be causing this vibration?

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post #22 of 22 Old 07-13-2016, 05:34 PM Thread Starter
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Just to finish this up for future reference it was the tires. I slapped on a new set of tires and went for a burn and all is good again!

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