Light "rattling" sound when warm
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  1. #1
    Senior Member jontow's Avatar
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    Have something going on with the TW since late last season, and I've probably put 1k miles on it since I noticed. The last time this happened it went pretty bad, but I'm just not sure on this one.



    When the bike gets up to operating temperature, at idle theres a light "rattle" coming from somewhere. It sounds like a washer on a shaft clinking against some hard surface next to it. When the bike is cold it never seems to happen.



    The observations I have: doesn't change with the clutch engaged or disengaged, despite my head telling me its somehow coming from the clutch. It doesn't sound like valve rattle, although its time for me to pop open the covers and check into that anyway. I've got a temp sensor on the bike, and it isn't getting extremely hot by any means, just up to temperature and it starts.



    Before I crack anything major open and cause myself more oil leaks that I just solved... is there a washer/spacer/anything on the clutch side that might cause this noise? I don't remember from when we were hacking away on operose's clutch.



    Also acceptable/desired: any hints whatsoever



    EDIT: I'm running 10w40 mobil 1 racing 4T--I've been through an oil change interval, I'd run Mobil 1 20w50 in it last time, was doing it then, too. Sometimes, if I ride 40mph or less from a cold start, it won't do it, but if I exceed 45mph for any distance, the engine is 'warmed up' enough, and it'll do it.
    --

    1997 TW, well loved, a bit modified.

  2. #2
    Senior Member jckosnow's Avatar
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    im no expert but I've heard a lot of people say the tw engine is an old design & just plain noisy even when it's running well.
    2012 TW200, 1993 KLR650, 1992 GSX750F

  3. #3
    Senior Member jontow's Avatar
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    Well, its certainly a new noise as of late last season, but I can think of no qualifying event to bring it on. I know what valve rattle sounds like, the bike was neglected when I got it, and it was making a heck of a racket then; this sure doesn't sound like that.
    --

    1997 TW, well loved, a bit modified.

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  5. #4
    Senior Member kdick91's Avatar
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    Quote Originally Posted by jontow View Post
    Well, its certainly a new noise as of late last season, but I can think of no qualifying event to bring it on. I know what valve rattle sounds like, the bike was neglected when I got it, and it was making a heck of a racket then; this sure doesn't sound like that.


    Any way you could capture it on video? Maybe a before and after? My guess it literally as you described it, just a loose bolt/washer somewhere. If it isn't getting really loud or anything, I probably wouldn't worry too much. As it was mentioned, these motors are buzzy and loud. Vibration is a side effect of that and maybe something non-essential vibrated itself loose.



    Kyle
    Gone - 2006 TW200
    Gone - 2014 CB1100
    2015 WR250R - Bored, stroked
    Gone - 2000 Trans Am
    Stolen - 2007 Trailblazer SS
    2014 Jeep Grand Cherokee SRT
    1977 Steyr-Puch Pinzgauer 710M

    2 Timothy 1:7

  6. #5
    Senior Member NumberThree's Avatar
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    Adjust your cam chain if you haven't already. My parents bought a '00, and it was very rattly sounding until I adjusted the cam chain...



    It's a very easy procedure, and only takes about 5 minutes...

  7. #6
    Senior Member jontow's Avatar
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    I might've found the rattle... ! I'll have to test my theory later, but if I'm right, its exactly what my ears heard: on the rear shock, the bottom pin that goes through the swing-arm has on one side a washer and a cotter pin.. the other side doesn't have a washer at all, and therefor quite a lot of space beside the cotter pin. That washer will readily move a few millimeters side to side.



    I'll update again if this fixes it.. thats the side of the bike that I think I've narrowed the noise to, as well. Hope its something that silly!
    --

    1997 TW, well loved, a bit modified.

  8. #7
    Senior Member jontow's Avatar
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    Nope! disregard. still on the hunt.
    --

    1997 TW, well loved, a bit modified.

  9. #8
    Junior Member Wheetie's Avatar
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    Quote Originally Posted by jontow View Post
    Nope! disregard. still on the hunt.


    Hey Jontow,



    I had a similar noise that drove me absolutely crazy, a loose washer bouncing around making a buzzing/jingly type sound. Having recently replaced the leaky base gasket and installed a kickstarter on my 08, I thought for sure I left something loose and my engine was going to explode. I checked tons of stuff, and was ready to pull the side cover off just to satisfy my curiosity, but accidentally found the culprit - the metal disk surrounding the keyhole on the gas cap. It didn't sound like it was coming from up there, more like down in the engine area, but I managed to see it vibrating when I looked down. As soon as I put my finger on it, the noise stopped. Slapped a piece of tape over it, and I've been jingle free for almost 24 hours! I remember finding your post while researching my noise a few weeks ago, and then just pinned it to the gas cap yesterday. Yay for easy fix! Never in a million years would I have suspected the gas cap and it's easy enough to check, so I thought I'd pass it along. Good luck!

  10. #9
    Senior Member operose's Avatar
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    Wheetie: Isn't it amazing? This is not a TW specific anecdote but still along the same lines.



    Jontow and I were on a day ride last year, 20miles back in the woods from the nearest public road, and my DRZ started making the most horrific rattling noise at any speed, we were fairly sure it would not make it home. I'm pretty sure he could hear it from his bike while we were riding.



    It turned out to be the passenger footpeg!!!!



    Stupid scary noises.
    ITCB

  11. #10
    Senior Member jontow's Avatar
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    Well I'll be damned. That's some astute observationing I think that might be it.. poked at the ring around the key hole when I got out from work, and the silly little thing is loose. I haven't heard much of the noise lately, but I'll keep an eye on it now. Did you find a way to fix it, or are you just mentally fixing (ignoring) it, now that its clearly harmless?
    --

    1997 TW, well loved, a bit modified.

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