2017 Road King Special Rear tire chirp on Decel
HDF Community Team
Joined: Nov 2012
Posts: 6,186
Likes: 2,412
From: USA
I will vote for belt chirp. Not belt squeal, but belt chirp. Different phenomena, different sound. Frequently caused be pulley misalignment. The belt rides against one side of the pulley when under load one direction, and then rides against the other pulley flange when unloaded. This can be accompanied by a chirp when the belt goes across. And yes, I know it's a Gilmer belt, and no I can't really explain the chirp. But it's not very uncommon.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
We're not dealing here with monster torque, so neither clutch should cause traction problems! A little skill on behalf of the rider will solve tyre chirp, if that is indeed the problem. 1k miles is still early days both for bike and rider. I'm interested to know more about the belt chirp.
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,467
Likes: 2,996
From: Charleston, SC
Simply letting off the throttle at either low or high RPM will not, should not, result in rear tire chirp. Has nothing to do with rider skill or the method in which a person lets off the throttle.
Probably an engine mount, exhaust joint, belt, bearing, something else...
Probably an engine mount, exhaust joint, belt, bearing, something else...
Thread Starter
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Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
Not happening when I downshift. It happens as I'm in gear. Roll off the throttle or just release it, doesn't matter, tire chirps.
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Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
Yes, I understand. My 2014 Night Rod Special also has a slipper and belt driven. Smooth as butter when I release or roll off the throttle. Service Adviser said, you can't compare the 2 they are different engines and bikes." No **** genius.
Thread Starter
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Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
Not gearing down when it happens. Jusr roll off the throttle or even releasing throttle causes it. And It can happen at 2000 RPM, 3,000 RPM. Not RPM related. I feel a jerk and hear a chirp when I get off the throttle. Dealer says it's normal. I say Bullshit.
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Thread Starter
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Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
I don't see (hear) how that's tire chirp. You can't generate enough force to exceed the tire traction just rolling off the throttle. If you could, you wouldn't be able to pull away from a stop either.
I will vote for belt chirp. Not belt squeal, but belt chirp. Different phenomena, different sound. Frequently caused be pulley misalignment. The belt rides against one side of the pulley when under load one direction, and then rides against the other pulley flange when unloaded. This can be accompanied by a chirp when the belt goes across. And yes, I know it's a Gilmer belt, and no I can't really explain the chirp. But it's not very uncommon.
I will vote for belt chirp. Not belt squeal, but belt chirp. Different phenomena, different sound. Frequently caused be pulley misalignment. The belt rides against one side of the pulley when under load one direction, and then rides against the other pulley flange when unloaded. This can be accompanied by a chirp when the belt goes across. And yes, I know it's a Gilmer belt, and no I can't really explain the chirp. But it's not very uncommon.
Thread Starter
|
Cruiser
Joined: Sep 2016
Posts: 116
Likes: 14
From: Orlando, FL
We're not dealing here with monster torque, so neither clutch should cause traction problems! A little skill on behalf of the rider will solve tyre chirp, if that is indeed the problem. 1k miles is still early days both for bike and rider. I'm interested to know more about the belt chirp.
Belt chirp as described above could be the issue. I hear a chirp and assumed it was the tire. But now that I think of it, I don't see marks on the ground after it happens. Would think there would be a tire mark maybe, but it isn't so violent, so who knows. BUT there is a chirp and a slight jerk at the same moment it happens.