The bark is back!

[Pierrel]

Just came back from a 4,600 km (2,800 miles) trip on my 600 sport and the infamous seal bark is back I had the dealer perform the 10,000 km service before I left and the tensioner was replaced about a month ago. After they replaced the tensioner the bark had disappeared so I thought this was the source of the problem. Obviously not! It is going back to the shop in the coming week so will see what they have to say! By the way I posted a little report on my trip under the Touring and travelling section of the forum.

 

[Snowdog]

Bark?

Just came back from a 4,600 km (2,800 miles) trip on my 600 sport and the infamous seal bark is back I had the dealer perform the 10,000 km service before I left and the tensioner was replaced about a month ago. After they replaced the tensioner the bark had disappeared so I thought this was the source of the problem. Obviously not! It is going back to the shop in the coming week so will see what they have to say! By the way I posted a little report on my trip under the Touring and travelling section of the forum.

The "bark" is a common CVT noise. If it drives you crazy, you might as well buy something with a gear transmission. Other wise learn to live with it.

 

[Oldscoot]

I had a Kymco 500 that had a "growl" coming from the CVT. It was common to the model. As I have said before every bike has its own peculiar noises that just take time getting used to.

 

[SteveADV]

The bark is more than noise in some cases. It signals an issue with the trans/motor relationship at specific low speeds....similar to gear grinding. If you don't have it, great. If you do, do not blow it off. Get it checked out.

 

[Pierrel]

If this was "normal" sound then how come my bike only started doing it at around 6,000 km, stopped doing it after they changed the tensioner and then started doing it again around 10,000 km? It is going back to the shop for a checkup next week.

 

[wsteele]

I have the so called bark it starts right off when I start riding, as the bike heats up it will disapate I have found that at about riding 40 miles it is almost gone when I take off from a dead start but You can still hear it a bit If I start off with aggressive throttle no bark. As Snowdog mentioned this is a common cvt noise and the cure is to clean and lightly sand the clutch pads and the bell or change out the whole assembly.

 

[Snowdog]

The noise will keep coming back. Yes, you can clean the belt and pulleys and sand the clutch pads, but, it will come back eventually. You might find it varies with temperature and humidity. It's nothing like gear grinding, it's like chirping your tires when you power shift a standard transmission. Of course there are things that can go wrong in there, there are bearings and rollers , seals and the such. Yet, if you bike is "barking" on your ride, and you stop immediately and disassemble your CVT, most of us will only find some dust, not a box of broken parts for a warranty claim.

 

[SteveADV]

Uh, no, not at all like chirping tires when power shifting. At least not the grinding I got, sometimes with the bark and sometimes with a growl. Tough to diagnose the problem on a forum.

 

[Snowdog]

Uh, no, not at all like chirping tires when power shifting. At least not the grinding I got, sometimes with the bark and sometimes with a growl. Tough to diagnose the problem on a forum.

The bark is not a gear grinding noise, it is caused by slippage of FRICTION materials and is caused by small slippages similar to tire chirps.

 

[Skutorr]

....and, again, upgrading to a Dr. Pulley HIT clutch like they are all doing in Italy and Spain is the permanent CURE for all clutch issues, including the "Barking Chirp", "Chirping Bark", or the dreaded "Barfing Chick"...

 

[SteveADV]

The bark is not a gear grinding noise, it is caused by slippage of FRICTION materials and is caused by small slippages similar to tire chirps.

Are you saying I don't know what I'm talking about about when it comes to the mechanical sounds of this bike?? How dare you!

But in all honesty, I can only describe what I FELT/heard on my bike. The sound may be from a source exactly as you describe, but to me, the grinding that occurred at 10mph was too severe to be thought of in any way other than a grinding that was a bad thing.

As I mentioned on another thread, today I picked up my bike. The difference (at 10mph) is significant. At every other speed, the bike is as good as it has always been.

 

[Snowdog]

Are you saying I don't know what I'm talking about about when it comes to the mechanical sounds of this bike?? How dare you!

But in all honesty, I can only describe what I FELT/heard on my bike. The sound may be from a source exactly as you describe, but to me, the grinding that occurred at 10mph was too severe to be thought of in any way other than a grinding that was a bad thing.

As I mentioned on another thread, today I picked up my bike. The difference (at 10mph) is significant. At every other speed, the bike is as good as it has always been.

Since you can't shift the actual reduction gears , if they were grinding, they would make noise continuously. Although, if they were worn a small amount, they might make a noise at certain speeds or loads, but, would usually get worse eventually.
Maybe I am overly pedantic , but, I have been a mechanic since 1966. Yes , forums aren't the best place to discuss noises.

Quote, I thought I was wrong once, but, I was mistaken.