Hi guys/gals...
Time to play "Guess That Noise"!
My 2003 GS (7,000km) has been making a strange grinding, clattering noise from take off, like from a set of lights or stop sign. Its a metallic noise, kinda like a shudder of two metallic objects rubbing together. If I would have to pick an area it was comming from I would say just under my right leg below the tank. The sound is very breif, maybe at most a second.
It sounds as if the clutch is having a hard time, or gears are not meshing correctly, or there is an object obstructing something. It generally only happens when I take off hard... and it is only a rare thing, not like everytime I take off (although I take off hard nearly everytime to beat the cars). In fact it seems to only happen one time during a ride period. The noise is loud - I can hear it through my helmet and my ear plugs clearly.
Any suggestions what could be causing the noise?! Or anyone ever had a noise like it before.
Thanks in Advance
Stay Safe :thumb:
Idea #1: Loose exhaust clamp
(http://www.bbburma.net/MiscFotos/100_0749_LooseExhaustClamp.jpg)
Idea #2 (less likely): Loose chain adjuster at the rear end of the swingarm
(http://www.bbburma.net/MiscFotos/100_1433_ChainAdjuster_RightSide.jpg)
EDIT: Changed links from sisna.com to bbburma.net
I had a loud noise that was consistent in a certain RPM range. It was caused by a cracked crash bar flange. The crash bar would resonate at this RPM.
When does it happen exactly? When you release the clutch or before that moment (when you rev up)? If it happens just when you release the clutch, it has something to do with the clutch plates or gearbox. If it happens before you release the clutch, it`s probably some loose thing or at worst, something within the engine. Try to listen carefully when it happens. It doesn`t happen offen, so it won`t be a large problem. And you say it`s coming from the right side of the bike and that`s where the clutch plates are located. So it could be the clutch, but I wouldn`t worry too much, especially because it doesn`t happen that offen. If it gets worse, try to resolve it.
Thanks for the help so far...
It happens when I am releasing the clutch... as you do when your taking off.... not just reving
Thanks for the pics kerry... checked the bike over, dosent appear to be anything loose on the bike... seems to be an internal issue.
Stay Safe :thumb:
Have you checked your chain tension? If your chain is too slack, it can actually skip over the teeth of your sprockets, with an accompanying loud grinding noise. This would be most likely to happen on hard acceleration from a stop as you described. :dunno:
sounds like a broken clutch spring.
I have a GS with those exact symptoms you describe. Tore down the engine; nothing. My best guess is piston slap and synching the carbs may help. :dunno:
I had another of those "strange noises" a while ago... mine wasn't all metallic, but definitely a mechanic clank-clank when revving up, especially when taking off from lights.
Tore open almost the whole rear-end of my bike while hunting for it... eventually it turned out to be the rear-light assembly which, at least on my bike, gets to clank up-and-down since it's mounted "softly".
Cheers,
-Jarno
Holy ancient thread batman ...
Cool.
Srinath.