2017 Road King Special Rear tire chirp on Decel
Grand HDF Member
Joined: Jan 2012
Posts: 4,451
Likes: 2,839
From: Oklahoma
I suspect you are mis-diagnosing the problem and causing technicians to be looking in the wrong area for a solution. First, it is not clear to me if your throttle technique is UNCHANGED from when the bike was new and smooth to now. If you are handling the throttle the same way and it is now rough, something has changed. On the assumption you are doing the same thing now as before, I would suspect a mis-fire as you transition from drive to coast and on a new bike that should be fixed under warranty. The chirp may well be coming from any rubber cushion or flexing metal to metal joint on the bike. The rear muffler hangers are notorious for chirping after awhile, yours may be starting in early because of your jerking problem. Engine mounts, the stabilizer link, even exhaust pipe heat shields are very likely candidates. Correcting the rough transition from drive to coast may quiet the chirp NOW, but it may well return as various components loosen up with use. In short, I believe you have TWO minor problems, one is the rough transition from drive to coast, and the other is some component chirping when "disturbed". Finding a "working" component can be a long and frustrating effort.
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Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
There's absolutely no way I can roll off the throttle any slower and it still causes the chirp and slight jerk. I've tried this to the point where no one on earth could let off their throttle so slowly and still have an enjoyable ride-for testing purposed. Also, I ride my NRS Special the same exact way-as far as my throttling off and absolutely zero chirp or jerk. Same thing when I rode my buddy's Road Glide. CANNOT reproduce this phenomena on any other bikes at my disposal at the moment. So, definitely not rider error.
Now, whether it is the tire, the belt, the pulley, or exhaust hangers as some have mentioned, that should be HD's issue to find and resolve. I paid 26k plus another almost 3k for VIP Insurance. And all they say, it's normal. But other bikes don't have this from what I'm reading on forums.
I'll confirm myself when I ride another new bike hopefully this weekend.
Now, whether it is the tire, the belt, the pulley, or exhaust hangers as some have mentioned, that should be HD's issue to find and resolve. I paid 26k plus another almost 3k for VIP Insurance. And all they say, it's normal. But other bikes don't have this from what I'm reading on forums.
I'll confirm myself when I ride another new bike hopefully this weekend.
Stellar HDF Member
Joined: Jun 2017
Posts: 2,231
Likes: 653
From: Atlantic Canada, eh
Sorry for misunderstanding before. Was too late last night when I replied.
I did think of a way you might be able to determine if it is in fact the tire momentarily locking up. (chirp) Actually, 2 ways. Have someone video tape you as you roll off the throttle. The higher the frame rate the better.
Second way, go down a nice solid gravel road or driveway and have a helper (or yourself, but it;s harder to do yourself) determine if there is a little skid mark left over when the "chirp" occurs. This will be way easier to do on gravel as opposed to a solid road.
Hope these ideas help.
Good luck !
I did think of a way you might be able to determine if it is in fact the tire momentarily locking up. (chirp) Actually, 2 ways. Have someone video tape you as you roll off the throttle. The higher the frame rate the better.
Second way, go down a nice solid gravel road or driveway and have a helper (or yourself, but it;s harder to do yourself) determine if there is a little skid mark left over when the "chirp" occurs. This will be way easier to do on gravel as opposed to a solid road.
Hope these ideas help.
Good luck !
Thread Starter
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Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
Sorry for misunderstanding before. Was too late last night when I replied.
I did think of a way you might be able to determine if it is in fact the tire momentarily locking up. (chirp) Actually, 2 ways. Have someone video tape you as you roll off the throttle. The higher the frame rate the better.
Second way, go down a nice solid gravel road or driveway and have a helper (or yourself, but it;s harder to do yourself) determine if there is a little skid mark left over when the "chirp" occurs. This will be way easier to do on gravel as opposed to a solid road.
Hope these ideas help.
Good luck !
I did think of a way you might be able to determine if it is in fact the tire momentarily locking up. (chirp) Actually, 2 ways. Have someone video tape you as you roll off the throttle. The higher the frame rate the better.
Second way, go down a nice solid gravel road or driveway and have a helper (or yourself, but it;s harder to do yourself) determine if there is a little skid mark left over when the "chirp" occurs. This will be way easier to do on gravel as opposed to a solid road.
Hope these ideas help.
Good luck !
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