W
waehrik
Guest
Hello all,
(skip this paragraph if you don't want to read my intro )
I'm new here as I just got an R1100RS over the winter and I've put about 3k on it so far (I live in NH so not much opportunity to ride until spring hits). I got it in trade from a dealership and thought I lucked out because the bike I was trading in (00 CBR1100XX) had a much higher book value but I didn't like the bike and wanted something more comfortable and suitable for touring. Hence the R1100RS with luggage and a back rack. The dealership jumped at an even trade and I rode home with the BMW. It didn't run very well on the hour ride home, but it was also 20 degrees out so I figured that made sense, plus I had no idea how long the bike was at the dealership for. I parked it and started it up again a couple months later and found it still ran very poorly. I had paperwork from the dealership showing a Level II service being done just 2k ago, but I tore into it just to make sure everything was done right. I found the TBs were out of synch, valves were out of adjustment, and the TPS was way off. It ran much better afterwards. I had a Holeshot slip on from my old Bandit 600 and after I realized the BMW had a standard 2" exhaust I had a friend at a muffler shop make me up a midpipe and the Holeshot pipe went on easily. I pulled the CCP since the o2 sensor was removed. It was running a little lean with a high idle (1500rpm) regardless of the BBS position so I moved the throttle plate stop screws to stabilize the idle and reset the TPS to 0.400v at that point. With the silencer in the pipe to give some back pressure (it is essentially a wide open smooth pipe otherwise and LOUD) the mixture is almost right on. I have very slight surging around 3500rpm but can live with that. The bike runs very well.
Except for this extremely annoying rattling noise. It sounds like a bag of marbles or someone jingling their keys quickly and only occurs when I'm briskly accelerating or engine braking. I don't have any noise at idle (since I replaced the left side cam chain tensioner with the updated version) and the rattling will fall off if I pull the clutch in. If I park the bike on the center stand in neutral and rev the engine it'll make the noise as it spins back down to idle, so I didn't think it was anything to do with the transmission. I'm extremely confused by the noise and it's very annoying. I've tried searching around and the CCT seems to be the source of the noise for many people but I've already fixed that. And the throttle butterfly shafts are not vibrating, I've held onto the pulley on both sides and the noise did not diminish. With 28k on the bike I wouldn't think anything would be worn out. Does anyone have any thoughts what it might be or what I could check next?
(skip this paragraph if you don't want to read my intro )
I'm new here as I just got an R1100RS over the winter and I've put about 3k on it so far (I live in NH so not much opportunity to ride until spring hits). I got it in trade from a dealership and thought I lucked out because the bike I was trading in (00 CBR1100XX) had a much higher book value but I didn't like the bike and wanted something more comfortable and suitable for touring. Hence the R1100RS with luggage and a back rack. The dealership jumped at an even trade and I rode home with the BMW. It didn't run very well on the hour ride home, but it was also 20 degrees out so I figured that made sense, plus I had no idea how long the bike was at the dealership for. I parked it and started it up again a couple months later and found it still ran very poorly. I had paperwork from the dealership showing a Level II service being done just 2k ago, but I tore into it just to make sure everything was done right. I found the TBs were out of synch, valves were out of adjustment, and the TPS was way off. It ran much better afterwards. I had a Holeshot slip on from my old Bandit 600 and after I realized the BMW had a standard 2" exhaust I had a friend at a muffler shop make me up a midpipe and the Holeshot pipe went on easily. I pulled the CCP since the o2 sensor was removed. It was running a little lean with a high idle (1500rpm) regardless of the BBS position so I moved the throttle plate stop screws to stabilize the idle and reset the TPS to 0.400v at that point. With the silencer in the pipe to give some back pressure (it is essentially a wide open smooth pipe otherwise and LOUD) the mixture is almost right on. I have very slight surging around 3500rpm but can live with that. The bike runs very well.
Except for this extremely annoying rattling noise. It sounds like a bag of marbles or someone jingling their keys quickly and only occurs when I'm briskly accelerating or engine braking. I don't have any noise at idle (since I replaced the left side cam chain tensioner with the updated version) and the rattling will fall off if I pull the clutch in. If I park the bike on the center stand in neutral and rev the engine it'll make the noise as it spins back down to idle, so I didn't think it was anything to do with the transmission. I'm extremely confused by the noise and it's very annoying. I've tried searching around and the CCT seems to be the source of the noise for many people but I've already fixed that. And the throttle butterfly shafts are not vibrating, I've held onto the pulley on both sides and the noise did not diminish. With 28k on the bike I wouldn't think anything would be worn out. Does anyone have any thoughts what it might be or what I could check next?