BMW F800 Forum banner
Cancel
Create thread New Forums

Metallic Knocking Noise at Idle on BMW F800ST

Tags
clutch engine
Jump to Latest
396 views 10 replies 5 participants last post by  Smihkara  
S
#1 ·
Hello,



I own a BMW F800ST and recently noticed a metallic knocking / clunking noise when the bike is idling in neutral.

Here are the details:



  • The noise is most noticeable at idle, especially when the engine is warm.
  • It is a periodic “tok/tok” sound, not a constant scraping noise.
  • When I pull the clutch lever in, the noise changes (sometimes reduces or disappears).
  • The sound seems to be coming from the right side of the engine (clutch / transmission area), not from the cylinder head.
  • Performance and gear shifting feel normal, but I’m concerned about potential wear or damage.





Possible causes I’ve considered:



  • Clutch basket wear (play in the basket fingers)
  • Worn or failing clutch release bearing (throw-out bearing)
  • Primary drive gear play or transmission bearing wear
  • Less likely: camshaft or valve train noise (as the sound is lower-pitched)





I’d like to confirm the source of the noise before it causes further damage. What would be the recommended diagnostic steps for this model?



Thank you in advance.
 
#2 ·
I have noticed this with every motorcycle I have owned. Idle (in neutral) is significantly quieter with the clutch pulled.
I wouldn't be especially concerned unless the difference is excessive or has changed dramatically over a short period of time.

Have you compared yours to a similar F800 Twin?
 
S
#3 ·
I dont have any similar f800st around and aound has changed dramatically last 5-7 days. Last 500 km actually. Some says every f800st has this engine problem it needs to be changed almost all engine parts. I m writing feom turkey. So i am not really aure what to do 😓
 
W
#6 ·
My very low milage 2007 ST has a clutch "chatter" noise when in neutral with the clutch out. That is normal. BUT if the sound has gotten louder (changed significantly) in the past few days, it is highly advisable to pull it apart and have a look at the clutch. Specifically the posible causes you has mentioned. If something "lets go" it will typically do more damage than you would like. Just my thoughts.
 
S
#11 ·
monday my mechanic will open it all and check it.. so i will know whats the deal. its really frustrating. the mechanic hear says they need to open inside the all engine. but when ı make my search its %90 clutch problem.. so we will see... ı hope just a clutch.. i will updtae as soon as ı know more..
 
BMW F800 Forum
posts
946K
members
62K
Since
2005
A forum community dedicated to BMW F800 owners and enthusiasts. Come join the discussion about performance, gear, riding, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
F800S & F800ST Discussion Grown-Up Discussion Off Topic Lounge F800GS, F800GS Adventure, F650GS Twin Discussion F800GT Discussion