Pointy swing arm side play.

Originally Posted by Mannerheim

Fastdruid: I believe still that SV construction is very good. For example Bandit type is not so good:

!!sv and bandit use same roller bearings and pivot spacer,the tophat bit,but have a normal bolt set up for the pivot shaft,and will check both my 600 and the 1200k3 i just sold,but as far as i am aware neither have side play

[yorkie_chris]

Originally Posted by wideguy

After reading through a lot of this, then looking at the installation diagram in the MM, then looking at my SV, lifting the rear and checking for side play, I have to say, I must be missing something.
This is a very similar system to the front axle.
If you installed the parts in proper order (1 pivot bolt, 2 hex nut, 3 castle nut) and torque them properly (15NM, 100Nm and 90Nm), there can't be any side play at the pivot.
Just like the front axle, it's made to apply sufficient pressure to the spacers so the inner races of the bearings won't spin. 15Nm on the pivot bolt will push the arms apart, slightly, as it compresses the spacers and inner bearing races.
There will be a gap on the castle nut side between the dust cover and the swingarm, but it's of no importance. The dust cover, and thus the spacers and inner bearing races, are secured by the shoulder on the castle nut end of the pivot bolt.
Surely you must be talking about side play at the rear end of the swingarm? A mm there would likely be normal. Mines less than that, maybe .5mm. I'm happy.

Yes you are missing something

It's not very similar to front axle, axle bearings provide some side to side support.

On swingarm, only axial support is given by inner spacer being right length. They are not compressible.

"It's made to apply sufficient pressure". Yes it should be, but no it isn't, they fooked up.

1mm is too much play, they handle better if you can make that like a couple of thou. This problem is play at front end, not wheel end. Wheel end play is a bit more due to angular movement.,

[DavieSV]

Ta-Da...



Sorry people, I forgot all about these.
Any one want some, please drop me a PM.

Originally Posted by yorkie_chris

Yes you are missing something

It's not very similar to front axle, axle bearings provide some side to side support.

On swingarm, only axial support is given by inner spacer being right length. They are not compressible.

"It's made to apply sufficient pressure". Yes it should be, but no it isn't, they fooked up.

1mm is too much play, they handle better if you can make that like a couple of thou. This problem is play at front end, not wheel end. Wheel end play is a bit more due to angular movement.,

Wheel spacers, the internal ones between the bearings, also need to be the correct length.
If the spacer in the swingarm is too short, how does adding shims outside help? Where exactly are these shims being installed? From the apparent size, it looks like between the dust cover and the frame?

[DavieSV]

Originally Posted by wideguy

Wheel spacers, the internal ones between the bearings, also need to be the correct length.
If the spacer in the swingarm is too short, how does adding shims outside help? Where exactly are these shims being installed? From the apparent size, it looks like between the dust cover and the frame?

If the spacer in the swing arm is too short, the swing arm will bind up and not swing.
The problem is the tube is too long.

Looking at the assembly again, if the inner spacers are too short, the shoulder on the pivot bolt (which is locked in the frame) will press against the dust cover and washer, then be hard against the outer race of the bearings, and against the swingarm. The result won't be side play, but lack of freedom of movement for the swingarm in the way it's designed to move- up and down.

Originally Posted by DavieSV

If the spacer in the swing arm is too short, the swing arm will bind up and not swing.
The problem is the tube is too long.

Thanks Davie. I was writing while you were posting.
The obvious solution to a too long part is to shorten it.

[DavieSV]

But to remove bearings is a pita & the price for new ones when you destroy them is ridiculous.
If you make it 0.002" too short, you will have to do it all over again & make a new spacer.
Putting a shim on the top hat is relatively simple & inexpensive.

You don't have to remove the bearings, just slide out the inner races and the spacer.
I've shortened several inner bearing spacers for wheels with careful use of hand tools, and you're right, you don't want to shorten them too much, but it's very simple and cost me nothing. And you could probably find a thin washer the same O.D. and I.D. as the spacer if you remove too much from the spacer.
Maybe all the swingarm spacers are the same length, but some of the swingarms are too narrow?
Mine seems to be correct for both, thankfully.

[yorkie_chris]

does spacer slide out from between bearings?
can you file square... and I mean really square...?


pretty sure all this is in previous posts in thread....