Checked under my sprocket cover today... what is this?

[limax2]

ooh it fitting wont be a problem - but you have to be able to get a screwdriver in to bend up the tabs - original looks like its tapered at about 45degs
the new one looks much steeper

I wonder if that is why there are two gaps in the rubber on one side of the sprocket. I can’t think of any other reason for the gaps.

[Disorderlypunk]

the gaps are only there to locate the two locking bolts that is used on a different type of sprocket retention system - luck may be on your side and the gaps line up with your nut edges but luck of the draw is never incorporated into design
(except on the mrs punks scratchword scratchcard, if it gave us a S or a T at the end we would have been rolling in £300,000 that was designed bad luck)

[bandit]

[quote author=Disorderlypunk link=topic=23903.msg277318#msg277318 date=1522100355]
ooh it fitting wont be a problem - but you have to be able to get a screwdriver in to bend up the tabs - original looks like its tapered at about 45degs
the new one looks much steeper

I wonder if that is why there are two gaps in the rubber on one side of the sprocket. I can’t think of any other reason for the gaps.
[/quote]


It probably doesn't matter which way round the sprocket goes on but pics I have seen show the full circle of rubber faces you on the nut side & fitting the locking washer & bending the tabs to lock the nut is no problem as a lot of Japanese bikes use the washer design & fit shock type sprockets as std Bandits 600cc/1200cc for instance. 

[fazersharp]

Gonna resurrect this topic as I have just brought a new set and have the same front and also wondered which way around I should fit it.After looking closely at it if you see my pictures you will notice that one side has counter sunk holes and the other side does not. When the bend- tab washer sits on the nut, if your fitting for a 530 pitch 15t front sprocket ( this one ) is done via two counter sunk machine screws then you would fit the sprocket with the full dough nut ring facing you as that is the side with the counter sunk holes because as you can see the tab washer sits over them.
Then( I think ) if your bike fitting is via two bolts then you would fit with the two dough nut halves facing you as there is then enough room for a bolt head and get a socket over it. But the tab washer will not fit - or at least our tab washers for our bikes, any way why would you need one with two bolts holding it.

So for our use I think that is does not matter which way it fits.
Also as you can see the tab is half bent ready the get something under it so although it is very close to the rubber you can still get under it.
What do every one else think. 
EDIT ---You know what - I don't it is actually counter sunk after all

[unfazed]

Cut out is usually to the outside.

[fazersharp]

Cut out is usually to the outside.

Why so ?

[Fazerider]

[quote author=unfazed link=topic=23903.msg297333#msg297333 date=1556743860]
Cut out is usually to the outside.

Why so ?
[/quote]
It makes it easier to bend the tabs of the lock washer up.
Also, some bikes use a sturdy locking plate which bolts to the two threaded holes in the sprocket.

[unfazed]

:agree

[fazersharp]

It would only make one tab easier. I don't think the sprocket was first designed for the  :faz .
I will find out when I take off the old orange OEM one but did that also have the extra dampening on the other sideHere my old in place