What is this thing inside the front sprocket cover?

[rhinoeli]

What is this metal sheet thingy inside the front sprocket cover? Couldn't loosen 2 of the 4 screws, no impact driver at hand.
Picture attached.

[ChristoT]

It's to do with the clutch

[rhinoeli]

It's to do with the clutch

I don't think so. I am talking about that large metal thingy fitted by 4 Phillips screws. Does it cover something or is it just to make the cover more rigid?

[fazersharp]

Its sound proofing and only the early bikes have it and there i no one on earth who can remove those screws see here http://foc-u.co.uk/index.php/topic,10124...#msg105271 bottom two posts

[Fazerider]

It does have one useful feature: it prevents the old 9mm self-loosening sprocket nut from falling off the end of the drive shaft. :lol

[rhinoeli]

It does have one useful feature: it prevents the old 9mm self-loosening sprocket nut from falling off the end of the drive shaft. :lol

That really is a good feature. I hope I won't need it.

[wraith600]

got mine off was a pain though

[darrsi]

Its sound proofing and only the early bikes have it and there i no one on earth who can remove those screws see here http://foc-u.co.uk/index.php/topic,10124...#msg105271 bottom two posts

I still really like that particular post, i might lube the bearings up again at the weekend if it's not snowing or a monsoon, it makes a huge difference and it's not something you would ever think of doing normally.


I would advise everyone to give it a go  :thumbup

[Paulfzs]

[quote author=fazersharp link=topic=16328.msg187881#msg187881 date=1426875594]
Its sound proofing and only the early bikes have it and there i no one on earth who can remove those screws see here http://foc-u.co.uk/index.php/topic,10124...#msg105271 bottom two posts

I still really like that particular post, i might lube the bearings up again at the weekend if it's not snowing or a monsoon, it makes a huge difference and it's not something you would ever think of doing normally.


I would advise everyone to give it a go  :thumbup
[/quote]


as do i, i might try it myself.

[fazersharp]

So what year did they stop fitting that plate and what is behind it - any felt or somthing or just air

[unfazed]

It is a damper according to Yamaha and they stopped using them in the Foxeye models

I usually put them back into any Foxeyes I've worked on as they stop the sprocket nut falling off completely which stops the sprocket falling onto the threads and losing drive.

[Deefer666]

They were to stop the Front sprockets coming off if the nut failed, it baffles me as to why you would take it off as they are not designed to be removable

[fazersharp]

To properly clean all around,

[rhinoeli]

They were to stop the Front sprockets coming off if the nut failed, it baffles me as to why you would take it off as they are not designed to be removable

If they were aware of the sprocket nut problem back in 1998, why did Yamaha not solve it by using a nut like the new 12 mm one?
Also, why did they discontinue to install these plates in foxeye models?

[unfazed]

They were never designed to stop sprocket nuts falling off, but dampers to reduce sprocket noise.
I only noticed its that it may stop the sprocket nut falling off after it happened to my foxeye.
The damper was in the cover of my sons 400 but not in the cover foxeye. The bolt holes are there, but not threaded.
On further inspection I noticed that it was very close to the shaft and would have prevented the problem of the nut falling away completely and allow, as in my own situation where the nut came off completely, the sprocket fell on to the threads and I lost all drive when overtaking.