I guess Razor summed it up best "stinging is bad".

V-twins shake (most of them, although the Balance Shaft engines much less). The "potato potato" and the associated "good vibes" are probably 50% of the HD following.

But if it feels like a metal to metal, grounded out feeling, it isn't a good thing. I don't really know what to compare it to. If anyone has ever ridden in or drove a race car with a solid mount engine, you know what I mean. Everything buzzes through the engine operating range, more at certain RPMs due to torsional vibrations.

On our rubber mount Dynas if the mounts are out of alignment or the engine is not allowed to "float" there will be annoying "buzzes" at a frequency much greater than the firing pulses that induce the good shakes.

Here's an article a guy posted on shimming his DWG because of bad vibes he couldn't get rid of. http://spotks.blogspot.com/2005_07_01_archive.html Personally, I don't think you should have to get this involved if the bike is newer.

js1268, if you do a search, I am sure there have been motor mount "How to's" posted on the forums. As for your pipes going up & down...normal. Your peg buzz at certain RPMs may or may not be normal. Without feeling it, I can't tell. But like I said, some is normal, otherwise Kury wouldn't sell so many of the Iso-vibe products.

There really is no harm in checking that your mounts aren't grounded out and doing a proper alignment of front to engine to rear wheel after the break in periiod in my opinion. Mine was dog tracking pretty bad at 2000 miles. The rear wheel wasn't parallel to the engine or the front. More or less the bike was twisted like licorice. For that adjustment you have to stand the bike up and make the front disc vertically zero. Then check the rear with the same level or angle finder. If they are not in parallel you have to adjust the heim joint on top of the enigne. I would make that adjustment AFTER aligning the mounts though. I don't recall that procedure exactly and don't have an electronic version of the manual. But it isn't complicated.

 

My wifes06 Low Rider has a bad vibration. According to her it's worst than her03 Sportster. I've ridden it and it's bad even gotten worse. Went to the dealer yesterday and had them ride it. They saidit has"little" vibration but kept pointing to the Cylce Shack slip ons. I mentioned the motor mounts and surprise they have never heard of this on the dynas just the touring bikes.They also checked the front mount and it was ok.Spoke to them today after they called Harley and came back with a possible cause,"side stand pin" and also suggested checking to make sure the exhaust moves with the motor. WTF??? I really don't think that a side stand pin is causing this hand numbing, highway peg foldingvibration. The cycle shack slip-ons have been there for almost a year now and the vibration only started getting bad recently (last 500 or so miles). the slip-ons are the only mod, no stage 1 or air filter and we know that some pipes can add vibration but not this much. When we picked the bike up new it had some vibration, but having never owned a Dyna before we were'nt sure exactly how it would feel. I didn't think it would be assmooth as my Road King but its rubber mounted and it sure as hell should be better than her old solid mount Sporty and its not.
We have an appointment at the dealerfor next week for them to "look at it" and in the mean time I'll put the original mufflers on and make sure it has nothing to do with that. I'd love to try shimming the front mount (as in another reply) as that makes the most sense to me,but the bike still has 1 more year of warranty and the dealer really needs to do this and make the factory aware that there is a problem that needs to be addressed.
Dan

 

well i guess that i am not the only one with this horrible stinging vibe, just bought an 07 bob and like everyone else i to thought that maybe its supposed to be like that but i cant imagine thats true, i have ridin older dynas, road kings, sporters, softails, the kind of shake i am used to was like my road king, or my friends 01 dyna, just a nice potato potato shake that you would expect, the vibe i have now seems to be at the same or similar RPM range in each gear, and i am not sure if anyone else has felt this or not but after 55MPH the front end of the thing shakes crazy!

 

while we are kinda talking about motor mounts, the front mount on mine looks torn. i know, useless without pics but i am away from the bike right now. some one told me that they all appear torn. just wondering. mine shakes at highway speed enough to numb my hands.

 

1st year of ownership on wideglide i was getting a bad vib, even at cruising speed, took to dealer and they rolled there eyes and said tire pressure, ect, really diden`t want to check it out, but i insisted i always check pressure ect, turned out to be a broken front motor mount I loved smiling as i picked it up, sometimes we know what we are talking about

 

It's beginning to be more and more than the stealer does appears [:@]

Dan, good luck to you on trying to get the dealer to fix something. I really feel they have been able to rely on the HD badge and following for to long. But the market is getting flooded, and more knowledgeable folks will start to buy used and not have to bother with the stealers and warrantly.

That's the route I took...5 month old bike, 2000 miles when I got it. Didn't pay the $22k the owner had into it, so it doesn't hurt my feelings to fix things myself.

And with the knowledge of the fine folks on this site, 99.9% of the time, someone here has already had the problem you experience, so it's like a website of HD TSBs.

 

Have the dealer re-torque the mounts. Had the same problem on an 06 once the dealer
re-torqued everything was fine.

Frank T

 

Thanks to all for your input. The motor mount theory makes sense. I'd love to do it myself this weekend but we still have 1 more year of warranty left and the dealer (andThe Motor Co.) need to recognize that there is a problem and fix it. The bike goes in next Tues. and we're not taking back until its right. Let the games begin!
Dan

 

Couldnt find anything in manual about loosening mount bolts then running then retighting??? Where is this?

 

2002 service manual page 2-29
under vehicle alignment
weird place, took me awhile to find it too