Popping Noise From BMW F800

Mullet · 05-17-2013, 10:59 AM

I have searched the forum and can’t seem to find an answer to my question.
My 2009 BMW F800ST is making a deep popping noise at random times while riding. I can’t really determine where it is coming from and I can’t get it to do it while parked. The bike only has about 3400 miles and is basically brand new. I’m pretty mechanically inclined and this is driving me nuts.

Here are a few things I have noted:
• It does not seem to matter if it is hot or not.
• Bouncing on the suspension or bumps while riding seems to make no difference.
• Completely random when it occurs.
• I have checked everything I could for tightness, as far as bolts, connections and hoses.
• It only happens every so often, so I don’t think I’m going to bring it in to the dealer yet.
• No warning lights on.
• Bike is running great.
• It does not appear to be coming from the exhaust.

I may be hearing it come from under the seat, but it is hard to tell when riding. It sounds like it is coming from all directions. Maybe vacuum related?
Has anyone else experienced this on any of the F 800’s ? I will take any info you have. I’m stumped.

4TooMany · 05-17-2013, 12:02 PM

Possibly a stiff link in the chain, but that seems unlikely if it's that new.

Mullet · 05-17-2013, 12:23 PM

Yeah, its a ST so it a belt drive.
But I put it on the center stand and spun the wheel to check that too. No luck.

Its a mystery.

Thinking I'm going to just run it until it gets worse.

4TooMany · 05-17-2013, 12:54 PM

Ohhhh ST. I didn't notice that part!

Baitfish · 05-17-2013, 04:23 PM

Mine used to make a pop or 2 on over run on the stock exhaust but not all the time.
I fixed that by changing the muffler. Now it pops all the time on over run.

TowPro · 05-17-2013, 08:31 PM

Quote:

Originally Posted by Baitfish

Mine used to make a pop or 2 on over run on the stock exhaust but not all the time.
I fixed that by changing the muffler. Now it pops all the time on over run.

Mine will pop in the exhaust if I don't let the throttle to full off when decelerating at times.

JRP · 05-19-2013, 05:16 AM

Possibly road debris getting caught between the belt and pulley and being crushed.
As an after thought, have you checked the belt tension?

05-17-2013, 10:59 AM	#1
Mullet ^OP Adventurer Joined: Jan 2010 Location: South Louisiana Oddometer: 63	Popping Noise From BMW F800 I have searched the forum and can’t seem to find an answer to my question. My 2009 BMW F800ST is making a deep popping noise at random times while riding. I can’t really determine where it is coming from and I can’t get it to do it while parked. The bike only has about 3400 miles and is basically brand new. I’m pretty mechanically inclined and this is driving me nuts. Here are a few things I have noted: • It does not seem to matter if it is hot or not. • Bouncing on the suspension or bumps while riding seems to make no difference. • Completely random when it occurs. • I have checked everything I could for tightness, as far as bolts, connections and hoses. • It only happens every so often, so I don’t think I’m going to bring it in to the dealer yet. • No warning lights on. • Bike is running great. • It does not appear to be coming from the exhaust. I may be hearing it come from under the seat, but it is hard to tell when riding. It sounds like it is coming from all directions. Maybe vacuum related? Has anyone else experienced this on any of the F 800’s ? I will take any info you have. I’m stumped.

05-17-2013, 12:02 PM	#2
4TooMany Gnarly Adventurer Joined: Aug 2011 Location: Ann Arbor Oddometer: 233	Possibly a stiff link in the chain, but that seems unlikely if it's that new. __________________ MSF RiderCoach 2012 BMW F800GS Trophy 2011 Suzuki DRZ-400S

05-17-2013, 12:54 PM	#4
4TooMany Gnarly Adventurer Joined: Aug 2011 Location: Ann Arbor Oddometer: 233	Ohhhh ST. I didn't notice that part! __________________ MSF RiderCoach 2012 BMW F800GS Trophy 2011 Suzuki DRZ-400S

05-17-2013, 04:23 PM	#5
Baitfish n00b Joined: Sep 2012 Location: Sunny Queensland Oddometer: 6	Good popping or bad? Mine used to make a pop or 2 on over run on the stock exhaust but not all the time. I fixed that by changing the muffler. Now it pops all the time on over run.

05-19-2013, 05:16 AM	#7
JRP Old guy Joined: Apr 2004 Location: Hampden, MA Oddometer: 1,362	Possibly road debris getting caught between the belt and pulley and being crushed. As an after thought, have you checked the belt tension? __________________ "What could possibly go wrong? " The Jerk 2012 TE 250 2010 F 650 GS 1983 R 80 G/S

05-17-2013, 12:23 PM	#3
Mullet ^OP Adventurer Joined: Jan 2010 Location: South Louisiana Oddometer: 63	Yeah, its a ST so it a belt drive. But I put it on the center stand and spun the wheel to check that too. No luck. Its a mystery. Thinking I'm going to just run it until it gets worse.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: .
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode