TB Rattling
Posted: Thu Feb 25, 2010 5:57 am
Hi all.
There is a rattling sound when my engine was warm. Reading threads from various forums, many seem to have this problem with the LHS cam chain tensioner. I ordered both sides to be sure and replaced the LHS with the improved version last week. Supposedly an hour job but I took longer as I used the opportunity to clean the insides as much as I could.
I read of what a miracle cure this replacement does so imagine my disappointment when there was no improvement to the rattling at all.
I then remembered this part called a Ticker Killer in the Motorworks website. Reading up more on it, there are apparently other factors that can cause this. The TK is designed to cure the rattling on the RHS (BMW sure has a sense of humour ) of the TB caused by worn bearings or shaft. So after a ride, I put the bike on the center stand, start the engine and looked for the source of the rattle. Sure enough, it came from the TB and not from the cylinders. But despite putting my ear near both sides a few times, I couldn't tell if it was coming from the left or right TB. I probably need a bike statoscope but don't have one and don't know where to find one over here.
Anyway, this is the symptom. The rattling only comes when the bike is warmed up and in neutral with the clutch released. So I hear it only at the lights or after a ride. When I pull in the clutch, the sound disappears. If I pull and release the clutch a couple of times, sometimes it goes away. Do that again, and it comes back, especially if I just throw the clutch out.
Can anyone tell me with some certainty that worn TB is the cause?
Bing Carburetor offers replacement parts for both sides for US$170-ish.
http://www.bingcarburetor.com/flier2.html
Has anyone tried replacing theirs?
Are there other alternatives?
Does anyone know of any step-by-step instructions with illustrations, like the one for cam replacement?
Bing says if this problem is not nicked, it can lead to TB bushing wear "which are not replaceable" so I am more than a little worried and wished to fix this ASAP. But at the same time, I do not wish to spend cash fixing the wrong problem again so hope to obtain some feedback. Thanks in advance.
There is a rattling sound when my engine was warm. Reading threads from various forums, many seem to have this problem with the LHS cam chain tensioner. I ordered both sides to be sure and replaced the LHS with the improved version last week. Supposedly an hour job but I took longer as I used the opportunity to clean the insides as much as I could.
I read of what a miracle cure this replacement does so imagine my disappointment when there was no improvement to the rattling at all.
I then remembered this part called a Ticker Killer in the Motorworks website. Reading up more on it, there are apparently other factors that can cause this. The TK is designed to cure the rattling on the RHS (BMW sure has a sense of humour ) of the TB caused by worn bearings or shaft. So after a ride, I put the bike on the center stand, start the engine and looked for the source of the rattle. Sure enough, it came from the TB and not from the cylinders. But despite putting my ear near both sides a few times, I couldn't tell if it was coming from the left or right TB. I probably need a bike statoscope but don't have one and don't know where to find one over here.
Anyway, this is the symptom. The rattling only comes when the bike is warmed up and in neutral with the clutch released. So I hear it only at the lights or after a ride. When I pull in the clutch, the sound disappears. If I pull and release the clutch a couple of times, sometimes it goes away. Do that again, and it comes back, especially if I just throw the clutch out.
Can anyone tell me with some certainty that worn TB is the cause?
Bing Carburetor offers replacement parts for both sides for US$170-ish.
http://www.bingcarburetor.com/flier2.html
Has anyone tried replacing theirs?
Are there other alternatives?
Does anyone know of any step-by-step instructions with illustrations, like the one for cam replacement?
Bing says if this problem is not nicked, it can lead to TB bushing wear "which are not replaceable" so I am more than a little worried and wished to fix this ASAP. But at the same time, I do not wish to spend cash fixing the wrong problem again so hope to obtain some feedback. Thanks in advance.