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Hi,

Today when trying to replace my chain and sprockets something strange came up. The bolts that holds the rear sprocket and the carrier touches the inner swingarm when mounted! Somehow they seem a bit too long (same as before though, so thats not the issue). The rear spcrocket though has an engraving on the other side, which I faced inwards so the smooth side is facing outwards.
Anyone know what the heck it might be? Seems like there is a gap between the sprocket and the wheel but the bolts wont go further in to the rubber cushings.
Thanks a lot!

So even if you had the wheel out and lying on the floor the sprocket wont sit flush with the wheel? Can only be something in one of the cush drive holes or the sprocket has a lip on one side? but you said it doesnt even look like its touching? You havent put a load of grease in one thats trapped or a small animal fell in there by mistake?

If its an oz wheel send it to me and i'll check it out. I'll even send you a standard wheel to use while i 'test' it

Zadix wrote:Hi,

Today when trying to replace my chain and sprockets something strange came up. The bolts that holds the rear sprocket and the carrier touches the inner swingarm when mounted! Somehow they seem a bit too long (same as before though, so thats not the issue). The rear spcrocket though has an engraving on the other side, which I faced inwards so the smooth side is facing outwards.
Anyone know what the heck it might be? Seems like there is a gap between the sprocket and the wheel but the bolts wont go further in to the rubber cushings.
Thanks a lot!

Sounds as if you have mislaid the bearing spacer there is one on each side of the wheel also check you have fully located the sprocket carrier into the wheel some Vaseline on the rubber sleeves helps if they prove to be tight

Thanks for your input! But I have actually looked in the cushings but there was nothing there, the bolts are tightened and I dont think the two spacers are missfitted (pretty selfexplaining, they are identical and only fit one way...)
I moved the rear wheel a bit furher back, and the bolts just exactly clears the swingarm (free from the weld).
So the carrier and sprocket is supposed to sit tight? There is a gap there, so must be something in the cushings...

First picture shows the sprocket to wheel fitting...If it`s supposed to be a tight fit then theres obviously something wrong with the cushings..!


Second picture shows the sprocket to swingarm fitting. Quite tight, huh?

This thread is useless without pics!!

Sounds like a spacer is in the wrong place?

Just had a quick look at mine. Bit hard to dee due to chain but 2 things are clear.....

1 - there is no space at all between the sprocket and wheel/carrier thing.

2 - there is very little bolt showing above the top of the nuts. I can't see any thread on mine but yours show 2 - 3 "twists" of thread.

Let me think about this a little more

Sorry Zadix but not had to change a rear sprocket yet so no real knowledge here.


If you are using the same bolts and nuts ?? then either the bolts are pulling through further (right up to the shoulders where they weren't b4 ??) or the sprocket is thinner (by quite a lot !!) The nuts themselves look to be the right distance from the swingarm - it's just the blots protruding too far.

As for the spacer. Looks like it's in the right place and anyway it can't be the spacer cos that wouldn't affect the bolts.

I'm stumped.

Someone has at sometime has replaced the bolts maybe ???

The sprocket is a bit thinner than OE, it has an engraving at one side. This affects how much thread is showing, thats nothing I worry about, more than aligning the front and rear.
But since the sprocket should be a close fit to the wheel then there`s the problem..it has to be! I mean, the bolts are just the same as before, and they can hardly become longer by themselves....

Must take a better look in the cushings, must be something in there..!

Zadix wrote:The sprocket is a bit thinner than OE, it has an engraving at one side. This affects how much thread is showing

Sounds like you have found the answer, ie if it were thicker = less thread protuding

Does the disc fit back into the caliper on the other side when the caliper is in place? (This is mainly to clear up one of my own thought trains - It sounds like you've found the problem, possibly)

Thats true, but the bolt is the same lenght anyhow. Doesn`t really matter how much thread is showing, becaus the distance from the wheel (where the bolt has it`s end against the sprocket) to the end of the bolt is just as long, no matter how thick the sprocket is. Or am I wrong...?!

So the things is that the bolt has got to be a bit closer to the center of the wheel, thats the problem. Must be something in the cuschings preventing the bolts to slip all the way in, right..?!

//Kwackerz: Yes, it fits perfectly!

Zadix wrote:Thats true, but the bolt is the same lenght anyhow. Doesn`t really matter how much thread is showing, becaus the distance from the wheel (where the bolt has it`s end against the sprocket) to the end of the bolt is just as long, no matter how thick the sprocket is. Or am I wrong...?!

So the things is that the bolt has got to be a bit closer to the center of the wheel, thats the problem. Must be something in the cuschings preventing the bolts to slip all the way in, right..?!

//Kwackerz: Yes, it fits perfectly!

Hmm.. Interesting!!

My question about the disc was just to clear up that a spacer from the left hadnt been put on the right, etc

Hmm.. now ive got myself going round in circles. Ive got another thought now..ffs!

I thought about the same thing Kwackerz, until a took a look at the spacers and they were identical...

Another slightly worrying thought....

The spacer presumably enters the centre of the wheel to some degree but should be limited as to how far by contact with.... what? .... the bearings ?

Just a thought that if the spacer were allowed to pull further into the wheel it would effectively become thinner ??

Surely not likely but worth a look maybe ?

BTW Zadix - is the axle done up tight in the photo showing the nuts/thread/swingarm ?