Help With Bad Sounds

From the video the chain looks to be too tight, have you any adjustment left to loosen it off being as you went up in sprocket size ?

The noise sounds like an over-tight chain to me.

 

That chain does look tight!

You checked it for a stiff link? Slacken off, go round chain and check all links, then tighten as per handbook.

 

Suggest not using the term 'tightening the chain' as it will confuse everyone. 'Adjusting the chain slack' is the proper terminology. A chain with a slack not adjusted per spec is dangerous. See below from my manual. 1" with bike upright (not on the side stand or center stand) and rear wheel on the ground with no additional weight on the bike.

 

I'll take a stab at it and say that even though you thought the chain was too loose, it was actually too tight in the first place when you fitted it.

In the unloaded situation you have in the video I would expect the chain to be running on the rubbing strip at the front of the swing arm.

You have to visualise the fact that when you sit on the bike the swing arm comes closer to being parallel with the ground which makes the swing arm longer thus tightening the chain, this is the initial tension, once the bike is in motion the operation of the suspension will bring the swing arm closer to being parallel with the ground which in turn tightens the chain further.

This is the reason the chain tension may look very loose when on the stand.

The chain being too tight for long periods of time can overload the rear wheel bearings and output shaft bearing in the gearbox as well as the damage caused to the chain & sprockets, so correct chain adjustment is critical to the longevity of many components as well as affecting the handling.

 

Having looked at your video a couple of times and stopped it when the wheel is stationary, I can't help thinking that the tyre is actually rubbing on the chain. There are a couple of strange marks on the edge of the tread where it meets the sidewall which may (or may not) be a result of a chain/tyre interface. Is the tyre on straight or could the back wheel have slipped out of alignment? 'Tis a bit hard to tell but the edge of the tyre does look pretty close to the chain, although I have nothing to compare it to.

Of course, I could be talking total bollox - again!

 

The noise to me sounds like chain noise, as has already been said.

Go back to basics and readjust the chain as per your handbook for the bike.

Unless you have covered large distances already then bearing damage at this point is unlikely but possible, make the adjustments and check wheel alignment.

I usually make alignment adjustments on the brake side of the swingarm as it affects your chain adjustment much less once you have the chain adjusted correctly.

 

Steven s.
I would say your chain is the culprit. Yes way way to tight. And the chain is slapping about to much. I know they do a bit when free wheeling but also as someone said if its hitting the tyre side wall it will do that. There is also one other thing you need to check. Where yo riveted you chain make sure you didn't damage that link.
Ride Safe
Joe.

 

I would not worry about this unless you have covered large mileages since you started with this issue, any issue with the output shaft bearing will show up or not probably via an oil leak at first, but these bearings are usually quite robust and take quite a bit of abuse.

 

You could also look inside the rear wheel hub, it's not unheard of for the spacer inside the hub between the bearings to drop out of place and cause the bearings to be unloaded laterally, but this usually also means the back wheel will wobble ! But It can be running true if the axle is well and truly over tightened. This usually happens during reassembly of the back end when doing chain replacement or pulling the wheel out for tyre replacing. It happened to me and wheel didn't move or cause any problems until I took the Wife on board for a Christmas Toy run some 2,000 klms after a tyre replacement !!

 

You didn't need to take the chain off to check it, just wind the adjusters all the way in and then go around just checking each link is free to move.
If you took it off, I take it was the same link used to join in the first place, that could easily be the link that was making the noise, if you had 'over-squished' it with the chain tool.
Agree with above, check all spacers are there and also all you cush drive rubbers.

 

Just as a general observation, the top run of chain normally lashes very little while the bottom run bellies out as it thrown off the gearbox sprocket. Watch race bikes in slo mo and you can see the physics clearly.
The top run finds its natural tension under load. Yours is whipping like a bow string.........under excess tension and made worse by suspension compression. The smartest thing you did was stopping!
As Mr O says, each link can be checked at the rear sprocket. Given proper adjustment, it should barely move as you pinch and pull but you will feel any seized link. I doubt that is the issue.

Just visualise the arc of two circles. One is slightly larger than the other with its centre slightly further forward. That is the geometry of swingarm to gearbox pivot points and why a chain needs some slack.

 

Seems to me like you should take it to the shop, if only to set your chain tension correctly (and check the front sprocket) They could show you the correct method.
Its dangerous to work on bikes if you don't know what you are doing.
Of course we all have to learn how. But best to be shown than get it wrong
and your chain snap or damage the bearings or chuck you off !