| Author | Message | ||
     Orangeulius |
After getting past my starting and pinging issues from last year (I think) one issue remains. I have 2500 miles on my 2006 Uly. Shortly after the 1,000 mile service, I noticed the bike/engine vibrated a lot more and wasn't as smooth. It has gotten progressively worse. The vibration is really noticeable at 2000 RPM. Whether under load or with no load the bike shudders as it decelerates down to 2000 RPM. This isn't a little shudder, it's major. I checked the drive chain and as best as I can tell it seems to be in spec. I also revved up a new 2006 a riding buddy of mine has. His is nice and smooth. Anybody have any ideas? | ||
| Wademan |
I wish I did but my bike seems the same. I just figured 2000 rpm is not a good engine speed.  One thing I have always had in the back of my head though is how smooth the Uly I demoed was. Mine has never been that smooth. | ||
| Orangeulius |
Yep, when you have several problems with your bike you almost wonder if it's all in your head or your just being too picky. We'll see what others have to say. | ||
| Az_rider |
While I think that 2000 rpms is too low an engine speed for our bike, I think you may have another issue going on. Since you mentioned the vibration is worse after the 1000 mile service, it may be possible the TPS reset was not done correctly. I reset the TPS on my Uly, and a friends Cityx, and both bikes run much smoother than when the dealer supposedly reset it. Might be worth having it done by someone else. | ||
| Orangeulius |
2000 RPM is too low, that's just where it really comes to a head when the engine is decelerating. I typically ride at 3500 to 4500 rpm's and when coming to a stop it's a massive shudder and shake as it passes by 2000. I can feel it through my teeth it's so bad. I never would have thought a TPS reset could do that. Thanks for the heads up. | ||
| Vikingdave |
My 2006 Uly does the same thing bout 2000 to 1800 rpm. Don't forget this is a 45 degree, push rod V twin with a long stroke engine, and no counter balancer. They have some character!  | ||
| Jlnance |
Does it happen at 2000 rpm in every gear? I'd check the tires and suspension setup if it doesn't. I thought I had all sorts of strange engine problems and they all turned out to be a cupped front tire. | ||
| Orangeulius |
The vibration happens in or out of gear,stationary or mobile so that pretty much narrows it down to engine related. | ||
| Jlnance |
OK, your lucky. Since it happens out of gear, get someone to sit on it and hold it at 2000 RPM while you look around to see whats loose. Check the mounts of the motor and the exhaust in particular. | ||
| Guybones |
I don't know if this directly relates, but I noticed that the around 2,000 RPM vibe has gotten significantly smoother with more miles on the bike. I have over 10,000(stop laughing, I ride my other bikes too!) on the Uly, and it seems like it started smoothing out at 7500 miles or so, unless I'm imagining it. Although to be honest, I never run it under 2,500 RPM. | ||
| Chadleys1 |
Change the plugs, do the TPS reset, and don't ride it at 2000 rpms anymore. If you are coasting down to 2000rpms in gear, smoothly downshift it before you hit 2000, a little rev to sync rpm to the lower gear won't hurt your smoothness either. I don't think I am ever below 2000rpms, but I will check and make sure, tomorrow. None of my other Buells will run well at those low rpms, either. It is a design thing. Try keeping the rpms around 3000 rpms, and you will feel like you are riding a freaking giant magic tiger that wants to lunge ahead and bite people. haha Seriously, you can ride in a very dignified manor without bogging the bike down by letting the rpms go too low. For anyone that remembers me from the S1 days, I am now the proud owner of a black 07 Uly. No I didn't sell FlyHo, the S1. | ||
| 12x_infatuation |
I too have a freaking giant magic tiger that wants to lunge ahead and bite people!! Seems to me it's the nature of the beast - have found that trying to wear earplugs will cause my brain to want to leave the building during that decel rpm range 2300 - 1800 or thereabouts... The motor seems happy enough to walk along or accel from 2000ish, just not decel through it. Oh, im sure the motor is happy enough, just those vibrations seem to find the softest thing around to absorb them - human flesh! | ||
| Naustin |
If this happend on my S3, I would pull over immeditatly and look to see which bolt in the front head to isolator bracket had sheered off - left or right. Check all your motor mounts as was suggested above. | ||
| Blake |
If you aren't positive, check the primary chain and be sure its tension is in spec. You'll need to check it at its tightest and loosest points in its travel. Free play should be in spec for each. Next would be the exhaust tract, check all mountings and connections. Then as already advised, check the engine mounting bolts and brackets and isolators. Finally, have the TPS rezeroed/verified. All that said, my experience is that 2000 rpm is not a happy place vibration-wise on any Buell. But the bucking action you describe is not normal by any means. I usually pull in the clutch and let the engine and drivetrain rest when coasting down to a stop. Compared to the engine and drivetrain, brakes are much easier to replace once worn out.  | ||
| Orangeulius |
Well after reading all the posts it must be the nature of the beast. I'm still going to have a few things checked out by the dealer because my aging brain remembers it running smoother. Of course I remember being a lot more handsome too  | ||
| Ft_bstrd |
I think it's the nature of the beast. I rode yesterday and felt what you are talking about. It's like a "magic spot" that is too slow to be smooth and too fast to be gentle. I have also noticed that outside temperature affects the vibrations. When colder, there is a vibration that is between 3,700 and 4,500 RPMs. As it heats up, the vibrations go away. I noticed yesterday that as the temperature dropped the vibrations increased again. |
