Noisy transmission

Hello there to all Swingers.Just a question.When your engine is off and you are rolling downhill even at very low speed,do you hear a "crying" sound from the back tsansmission compartment ?Please check it to your next ride and inform me.Thanx in advance

Dragging rear brake? Possibly a rear brake piston which doesn't retract enough. 

Does the sound go away if you apply slight pressure on the left brake lever?

Pull the brake pads to check for abnormal wear. Maybe that will suggest something.

Replacing the brake piston seals & dust seals is not very difficult. Lots of YouTube videos to show you the technique. Bleeding the brakes can be a bit of a PITA though.

Tim

I would second the noise is coming from the rear disk.Disk brakes can produce noise at times due to there exposure to the elements.
When you expect the rear pads if they are not worn down, they may just need some cleaning with some medium sand paper and a good blowing out with compressed air. Not knowing your experience but when reassembling ever thing you want to slightly compress the pistons to give some room for the dick pads to go over the rotor.
Hope this helps,let us know. Howard

Νο no.The noise is not related with brake.Is a noise from bearing or a shaft.Something like the sound of reverse gear of a car

With bike on center stand rotate back wheel. Can you hear noise?

Take off the drive cover & put some grease on the needle roller bearing (in the cover) that supports the outer end of the clutch shaft

I'll try that.Thanks.You mean the sealed type bearing on the metal transmission cover

Yep, while the cover's off you could also remove the drive belt, spin the clutch body & listen for any noise, there is a bearing inside the clutch shaft (behind the fixing nut) that may also benefit from a bit of grease.

The Bern wrote:

Take off the drive cover & put some grease on the needle roller bearing (in the cover) that supports the outer end of the clutch shaft

 
It's a sealed bearing in an impossible location; how can you put grease in that (drive cover) bearing?

With the engine OFF and the scoot coasting, the Final Drive input shaft (inside the Driven Pulley) would still be turning along with the wheel. The Driven Pulley would not be engaged though, so that drive cover bearing would not be in play under those circumstances. 

I agree with your advise to grease the needle and roller bearings in the Drive Pulley (aka clutch). While you're there lightly grease the O-rings at the end of the Driven Pulley --the end that mates with that drive cover bearing. 

Tim