Closed Throttle Noise-Help

[Gdserlin]

I have a strange noise in my 89 Venture. I suspect it has always been present but has recently become much louder. The noise occurs under the following conditions: Transmission engaged. The noise NEVER occurs in neutral, or when clutch is enaged-meaning nuetral. Enaging clutch will stop noise. Noise always occurs at closed throttle (high vacuum?), never at partial or open throttle or full open throttle. Noise is most obvious in 2^nd -5^th gears. The noise may be present in 1st gear but is hard to hear. Noise is obvious on downshifting or closing throttle. As along as throttle is closed and bike is turning some RPMS and wheels are moving, the noise is present. Depress clutch and or open throttle and noise disappears.

 

 

 

Thanks to all on this forum.

Edited July 10, 2013 by Gdserlin

[Peder_y2k]

Not knowing, I hesitate to answer, but I suspect the clutch.

-Pete, in Tacoma WA USA

[MiCarl]

So the noise happens coasting in gear? Improper gear lash in the drive line can cause that. In my case it was a broken pinion shaft on the final drive.

 

The pinion shaft at the middle gear set has also been known to break. It can also be a bad bearing.

 

Put it on the center stand and turn the rear wheel (motorcycle off and in neutral). Listen for any grinding, growling or clicking sounds. The brake will likely drag a bit making discerning noises difficult.

[Chaharly]

I have a strange noise in my 89 Venture. I suspect it has always been present but has recently become much louder. The noise occurs under the following conditions: Transmission engaged. The noise NEVER occurs in neutral, or when clutch is enaged-meaning nuetral. Enaging clutch will stop noise. Noise always occurs at closed throttle (high vacuum?), never at partial or open throttle or full open throttle. Noise is most obvious in 2^nd -5^th gears. The noise may be present in 1st gear but is hard to hear. Noise is obvious on downshifting or closing throttle. As along as throttle is closed and bike is turning some RPMS and wheels are moving, the noise is present. Depress clutch and or open throttle and noise disappears.

 

 

 

Thanks to all on this forum.

 

 

to bring up an old post but have you figured out what caused this? My 88 does that, and I think its just gear lash but I'm not sure

[Chaharly]

I have a strange noise in my 89 Venture. I suspect it has always been present but has recently become much louder. The noise occurs under the following conditions: Transmission engaged. The noise NEVER occurs in neutral, or when clutch is enaged-meaning nuetral. Enaging clutch will stop noise. Noise always occurs at closed throttle (high vacuum?), never at partial or open throttle or full open throttle. Noise is most obvious in 2^nd -5^th gears. The noise may be present in 1st gear but is hard to hear. Noise is obvious on downshifting or closing throttle. As along as throttle is closed and bike is turning some RPMS and wheels are moving, the noise is present. Depress clutch and or open throttle and noise disappears.

 

 

 

Thanks to all on this forum.

 

Did you ever get the noise figured out