85 R80 RT. Threshing sound.

[franko]

While riding to the next town south, I started hearing a threshing sound between my legs at about 60 mph in 5th gear. If i disengaged the clutch and backed off of the throttle, the sound went away.. As I was riding back home, the sound would also start while in fourth gear, whereas it hadn't happened before. I took the smaller back roads, so I could keep the speed demands down. The noise in 5th to noise in 5th and 4th was in less that 20 miles. Nothing yet in 1rst to 3rd.
Any ideas? I'm loaded in stuff that I need to get done, so it will be a bit before I get a full inspection/tare down. going.

 

[stevenrankin]

How many miles on the bike, when was the clutch inspected? When was the gear oil changed last? was there any metal on the magnet? When was the transmission input shaft last lubricated? Does the clutch work the way it should?

More information is good information, St.

 

[20774]

The '85-94ish bikes had a circlip eliminated on the output shaft of the transmission. Some have found that that front bearing begins to walk and it increases pressure on that part of the transmission. Something to consider after doing what ST suggests.

 

[PGlaves]

What is a "threshing sound"?

 

[Lendog]

While riding to the next town south, I started hearing a threshing sound between my legs at about 60 mph in 5th gear. If i disengaged the clutch and backed off of the throttle, the sound went away.. As I was riding back home, the sound would also start while in fourth gear, whereas it hadn't happened before. I took the smaller back roads, so I could keep the speed demands down. The noise in 5th to noise in 5th and 4th was in less that 20 miles. Nothing yet in 1rst to 3rd.
Any ideas? I'm loaded in stuff that I need to get done, so it will be a bit before I get a full inspection/tare down. going.

If the clutch cable is tight it causes strain on throw out bearing,
years ago I bought a high mileage r90/6, at 130,000+ miles the crankshaft end play was excessive causing clutch issues

 

[stevenrankin]

An improperly adjusted cable can cause excessive wear on the throw out bearing. Add checking your adjustment to you list of things to check. St.

 

[kinterridge]

What is a "threshing sound"?

Paul, go to https://www.pond5.com/search?kw=threshing&media=sfx You'll get the threshing machine sounds.

 

[AntonLargiader]

I would start by draining the transmission oil and seeing what is on the magnetic plug.

 

[PGlaves]

Paul, go to https://www.pond5.com/search?kw=threshing&media=sfx You'll get the threshing machine sounds.

Nope. Not since they think I will pay $8 or $5 to hear the sound.

 

[kinterridge]

Nope. Not since they think I will pay $8 or $5 to hear the sound.

Sorry about that, I listened for free, didn't see a charge. I wouldn't have paid either.

 

[pauls1150]

I also listened to the examples for free... didn't see anything asking for $$$ ... maybe because you're somewhat "off the grid" and it's a connection fee?

 

[cseltz]

I’m not off the grid. It was going to cost me $8.00. Anyway, back to the regularly scheduled problem!

 

[olironrider]

… about the “threshing” sound: I can best describe that as the sounds of a farm tractor/baler, compressing the wheat stalks into straw bales, following harvesting of the grain. A basic constant hum of the baler’s engine or PTO (power take off), over-laid with a deeper sound at 2-3 second intervals, where the baler’s ram is forming the bales.

Same sounds are heard when cutting pastures for hay; once heard, never forgotten. I spent many hours of my youth on the bale wagon, which is the third component in the convoy, catching bales to stack them on the wagon. Timing, quick on your feet, enduring strength were required as the baler kicked the bales, whether you were ready or not …



Will always have a love of FARMALL tractors and BMW Airheads: Simple, Reliable, Durable machines you can still get parts for !

 

[franko]

I'm sorry about the delay in replying. I am hesitant to start working on her, as I've other projects that I need to get done first.
First will be to drain both oils and look for dross.
Thank you for the replies.