Tiger 1050 Rear Wheel

Never heard of this before. The nut is torqued to 146Nm which is pretty hefty and usually needs a breaker bar or rattle gun to release it. As long as the belleville washer is installed the right way round then I cannot fathom why this is happening. Thread lock should not be required.

 

Is the nut actually loose and easily undone or is the movement due to a worn bearing?

 

Yes good point, like a hammering effect when in use. The slighest play could be enough.

Studlock, threadlock etc shouldn't be required on this fastener and I'd class that as a bodge or cover up of the real issue.

 

I'm assuming you've got the single sided swing arm version (earlier Tigers weren't)? If so then there should be a special wire clip that fits around the nut and in to a hole, when fitted correctly this makes it impossible for the nut to come lose, check the dealer has fitted this (some dealers add a cable tie to the clip as "belt and braces" to ensure it can't come off).
The fact you say the dealer has used thread lock where it shouldn't be needed worries me as to their competence.
The Belleville washer should be fitted with high side at bore towards the nut (there should also be a hard shim washer between the aluminium cone and Belleville)
Wire retaining clip

 

I just find it hard to understand how that large nut could come loose when torqued correctly to 146Nm with the belleville washer the right way round and the retaining clip in place. I suspect the slight movement detected could be due to worn wheel bearings or a missing bearing spacer within the cush drive if this is possible (has it been apart?).

 

@Wessa you don't actually say whether you felt any play in the wheel? (which would raise the possibility of bearing issues). You only mention the nut coming lose, I assume on the wheel side (there's also similar nut "staked" on the chain side, also at high torque setting). As @TRIPLE X has said I fail to see how that nut can come undone fitted correctly at high torque AND with the retaining clip fitted. If the dealer has failed to fit that wire clip and have bodged it with thread lock I would be reporting them to Triumph HQ and make sure I went elsewhere in future.

 

Wessa, what mileage is on the clock?

 

So it's had the big 12000 mile service which includes greasing the rear wheel needle bearing. This entails removing the axle so it is possible that the bearing spacer inside the cush drive got lost but probably not as I assume it was dealer serviced? Is there currently any movement at the back wheel? With the wheel off the ground can you hold the tyre each side and rock the wheel. Spin the wheel and try various positions - is there any movement? Also try pulling the wheel towards you then back in line with the axle - is there any movement? One of my past Speed Triples once got an advisory at it's MOT as there was some slight movement in the bearing. It was just coming up to it's 12000 mile service so I was just about to grease the bearing. The tester suggested that all it needed was repacking with grease and that proved to be the case.

 

This is all very curious, and I am far from an expert, but to just try and nail down the specifics of the situation...

You said that the dealer spoke to you at length about the configuration of the components including the retaining clip.

So, when this nut is now loose, is the retaining clip still in place?

Let's assume that it is...

Therefore everything has been doing it's job and the nut has obviously not unwound - it physically can't because of the clip.

Could the issue therefore be that the wheel is put on the axle, but isn't fully seated some how... everything gets torqued up, but after some milage the wheel works it's way "further on" to the axle?

Does that make sense? So the wheel works loose "the other way"...not coming off the axle, but going more "on" it?

I'd also tipex a few marks on some of these components ..help "see" any movement. (Actually, I use pink nail varnish...don't judge me...)