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post #1 of 15 (permalink) Old 12-22-2017, 07:07 AM Thread Starter
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Chirping sound when decelerating

I get a weird chirping sound when I decelerate especially when the engine is cold. It only happens when the bike is under load in gear and especially when I first start riding. I am trying to figure out if its coming from the engine or from the drive train. If I rev the engine in neutral and let off I don't hear the chirping sound. When I am accelerating and let up to press the clutch and shift I hear the chirping sound as load comes off the engine and drive train. Eventually as the bike get hot the sound is a lot less. Anyone experience this weird sound. Chirping is the best way I can describe it.
I have a 2015 RGS SE intake Rush power duals and Rinehart 4" slipons.
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post #2 of 15 (permalink) Old 12-22-2017, 07:17 AM
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Check for loose exhaust flanges. A head gasket can also cause a chirping sound.
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post #3 of 15 (permalink) Old 12-22-2017, 07:23 AM Thread Starter
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I will def check those again. Wouldn't I get the sound regardless if I was under load or not. If I am in neutral and rev the engine I don't get the sound. It is most pronounced when I let go of the accelerator when I am in gear.
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post #4 of 15 (permalink) Old 12-22-2017, 08:09 AM
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Quote:
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I get a weird chirping sound when I decelerate especially when the engine is cold. It only happens when the bike is under load in gear and especially when I first start riding. I am trying to figure out if its coming from the engine or from the drive train. If I rev the engine in neutral and let off I don't hear the chirping sound. When I am accelerating and let up to press the clutch and shift I hear the chirping sound as load comes off the engine and drive train. Eventually as the bike get hot the sound is a lot less. Anyone experience this weird sound. Chirping is the best way I can describe it.
I have a 2015 RGS SE intake Rush power duals and Rinehart 4" slipons.
I had a similar chirping sound. They ended up replacing the rocker arms and shafts because the shaft was rubbing against the head. 100 miles without the chirp so far.

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post #5 of 15 (permalink) Old 12-22-2017, 08:19 AM
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First thing to check is the belt. The chirp on decel is a classic symptom of it being too loose, then the noise goes away as the belt gets warm and tighter. Do this before you tear into the motor.

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post #6 of 15 (permalink) Old 12-22-2017, 09:02 AM Thread Starter
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Thanks for the advice. I will def check the quick and easy first.
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post #7 of 15 (permalink) Old 12-22-2017, 10:05 AM
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Quote:
Originally Posted by bless0 View Post
I get a weird chirping sound when I decelerate especially when the engine is cold. It only happens when the bike is under load in gear and especially when I first start riding. I am trying to figure out if its coming from the engine or from the drive train. If I rev the engine in neutral and let off I don't hear the chirping sound. When I am accelerating and let up to press the clutch and shift I hear the chirping sound as load comes off the engine and drive train. Eventually as the bike get hot the sound is a lot less. Anyone experience this weird sound. Chirping is the best way I can describe it.
I have a 2015 RGS SE intake Rush power duals and Rinehart 4" slipons.
I am experiencing the "exact" same thing as you are describing. I was thinking that it is coming from the front exhaust port. When I installed the new header the front flange felt "off" I tested it for leaks, cant identify any even now. To solve the problem I ordered a new exhaust system and will install this spring. (I realize I don't need a new system, but it was a good excuse). 2016 RGS, fuel moto header, I always wanted the V&H super radius, on sale at JP cycles for $509-$569. Hopefully I can get these aligned properly and it solves the problem, if it is the problem.
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post #8 of 15 (permalink) Old 12-22-2017, 10:12 AM
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I checked the belt and it is set to the manual, the sound seems to be coming from the front right area of the engine, but goes away after 10 minutes or so, up to temp I guess. In my illogical mind I figure the heat expands the metal and seals the gasket, but as you said it doesn't do it in neutral. I will check more into the rockers and belt just to be sure.
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post #9 of 15 (permalink) Old 12-22-2017, 10:35 AM
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Quote:
Originally Posted by bless0 View Post
I will def check those again. Wouldn't I get the sound regardless if I was under load or not. If I am in neutral and rev the engine I don't get the sound. It is most pronounced when I let go of the accelerator when I am in gear.
Does it chirp when sitting still or only when moving? If it only does it when moving, check the belt alignment to the sprockets. Alignment, not tension. If the rear wheel is slightly cocked to the side it can chirp, especially when it's cold. The belt must run in the center of the sprocket, not rubbing the shoulder on either side.

Last edited by norm9278; 12-22-2017 at 10:40 AM.
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post #10 of 15 (permalink) Old 12-23-2017, 08:26 PM
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(I realize I don't need a new system, but it was a good excuse)

Itís guys like YOU who make so many guys like US feel normal. Thank you, Morningwood! Thank [email protected]
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