niallmul
New Member
Hi. I did a service on my FZ6 S2 in December, changed oil and filters and replaced chain and sprockets. Since then I've noticed a humming/whining noise once I reach ~50kph, which increases in frequency as speed increases until I can no longer hear it over wind and engine noise after about 100kph.
During the time since then I tightened the chain and it got louder, so immediately backed it off again and it reduced the noise but persistently still there. It remains when the clutch is in or out - no difference there.
My first thought was wheel bearings but when I took off the rear wheel they are all turning smoothly with no issues.
However this week I took off the sprocket cover, and looking at the front sprocket I noticed these grooves around the rubber part where the chain is biting into it. I can't remember for the life of me whether these grooves were in it originally, or whether this could be producing the noise. Is this normal wear on a front sprocket? Or is it normal to have the edges of the chain making contact with the sprocket like this? Maybe I'm just being too paranoid altogether and it's a normal noise!
It's a JT sprocket and D.I.D chain. Not sure whether it was OEM sprocket previously, I've since thrown it away. But it definitely wasn't a DID chain previously. Would appreciate any tips on the state of the front sprocket, just to put my mind at ease. And I can post a video of the whining noise later.
Cheers!
During the time since then I tightened the chain and it got louder, so immediately backed it off again and it reduced the noise but persistently still there. It remains when the clutch is in or out - no difference there.
My first thought was wheel bearings but when I took off the rear wheel they are all turning smoothly with no issues.
However this week I took off the sprocket cover, and looking at the front sprocket I noticed these grooves around the rubber part where the chain is biting into it. I can't remember for the life of me whether these grooves were in it originally, or whether this could be producing the noise. Is this normal wear on a front sprocket? Or is it normal to have the edges of the chain making contact with the sprocket like this? Maybe I'm just being too paranoid altogether and it's a normal noise!
It's a JT sprocket and D.I.D chain. Not sure whether it was OEM sprocket previously, I've since thrown it away. But it definitely wasn't a DID chain previously. Would appreciate any tips on the state of the front sprocket, just to put my mind at ease. And I can post a video of the whining noise later.
Cheers!