need help, harley esp
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
I have had odd vibrations on my bike in the past. I suggest you go over the bike looking for something touching where it shouldn't, that the stabilizer links are tight, the exhaust is solid. I reckon there is something not right, or broken.
Road Warrior
Joined: Nov 2008
Posts: 1,296
Likes: 3
From: Cheltenham, UK
Balancing of machinery is a complex issue as there are a number of resonant frequencies so I am not overly surprised that it is smooth at certain frequencies and not at others but...
I am intrigued that you quote a speed rather than a RPM - if this is happening at idle Rpm with the bike standing still, does it change vibration modes at different rpm's - and settle down at a particular rpm that coincides with 70 mph?
Whilst riding there is a torque being transmitted by the drive belt. This can have the effect of stiffening the motor as it is being constrained by the mounts.
I am intrigued that you quote a speed rather than a RPM - if this is happening at idle Rpm with the bike standing still, does it change vibration modes at different rpm's - and settle down at a particular rpm that coincides with 70 mph?
Whilst riding there is a torque being transmitted by the drive belt. This can have the effect of stiffening the motor as it is being constrained by the mounts.
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
should the drivetrain be judged to be on the brink on failure, get documentation- this is a liability issue.
it is well established that a vehicle suddenly loosing power in traffic is a hazard, a single track vehicle more so, in that the rear wheel may lock up.
If you have some kinda warranty, then go back before it explodes under your legs and press the point that there is a problem
1.) it is less expensive to reapir a motor before it grenades
2.) they have liability if they allow a rider on the machine in the current state, if they judge a mechanical failure is imminent
mike
it is well established that a vehicle suddenly loosing power in traffic is a hazard, a single track vehicle more so, in that the rear wheel may lock up.
If you have some kinda warranty, then go back before it explodes under your legs and press the point that there is a problem
1.) it is less expensive to reapir a motor before it grenades
2.) they have liability if they allow a rider on the machine in the current state, if they judge a mechanical failure is imminent
mike
Road Warrior
Joined: Jul 2006
Posts: 1,302
Likes: 61
From: Near YVR
Keep all paper work .
If it gets to the point of not being able to ride safely they will have to fix something.
That is what you ahve the ESP for , it is an insurance policy...
Rob
Outstanding HDF Member
Joined: Jan 2011
Posts: 2,590
Likes: 31
From: Western Illinois, land of bad roads, and corrupt politicians
What are the RPMs at idle? Maybe set to low. When cold your RPMs will be a little higher, and drop when warmed up.
Tourer
Joined: Jul 2009
Posts: 350
Likes: 0
From: TN
i have a 2006 street glide and have had it at the dealer for exsessive vibrations. it is vibarating so bad the cd player skips. it only does it at idle. the mechanics at the dealer said it was shaking so bad it was hard to keep it on the stand in the shop. i was told it could be the fly wheel or a bent rod but their is nothing esp could do until it actually broke, they told me to keep riding it. It bothers me to ride it because it is shaking the bike apart at idle and i dont want it to tear up other things. Where should i go with this?
Go the Safety route on this one (locked engine @ 70mph).. Have them put it in writing "ride it till it breaks" they already said its not right I bet the will back up a step or two on their position pressuring ESP or will find something wrong. Might just be a Engine mount.. On another note have them fix the cd player, it may be related to excesive vibration that requires engine work.
Last edited by Sath; Nov 18, 2011 at 08:04 PM.
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Cruiser
Joined: Feb 2008
Posts: 240
Likes: 3
From: Norman Oklahoma
While on the side stand bring the rpm up to 4000,with air cleaner off and give it a BIG SHOT of nitrous. Try to stand away a few feet and look out for flying parts.Then let the experts tell what happened .
