GSA Front Wheel Disk Bolts

[buncobooth]

I am looking at having some new disks fitted to 2008 GSA and there seems to be some mystery about the correct bolts. Depending on which BMW Dealer I ask, I either get told they are one part, or the other part, or they don't really know. There also seems to be some added confusion as my VIN number does not show the spoked wheel option which I have so this may result in me getting the wrong bolts. There are two different ones listed on the catalogue:

For vehicles with
Cross-spoke wheels
X771A=Yes
02 Countersunk screw M8X27 10.9 MK 10 34117700989
02 Countersunk screw M8X22 10.9 MK 10 34117701390

Does anybody know which are the correct ones, without me having to try and wrestle one out of the wheel ?

Ian

 

[Bendy toy]

TBH the safest option is to get one out and slap it on the table (ooh Missus).

 

[Magwych]

I have spoked wheels, they are recorded against my VIN. The BMW online EPC says I have the 27 mm screws, that is what I am about to order ...

 

[Bendy toy]

Is it possible the 22mm are for the rear disc? Just asking, but the carrier is not especially thick.

 

[Magwych]

Now it does get confusing...
I spent a few more minutes on the EPC ...
I have 2008 MU 1200 GSA, mine from new. It comes, standard with cross spoke wheels, but when I delved into the filter conditions, X771A = with Crossed Spoke wheels and it said my bike (going by specific VIN) not have them - WTF?
So EPC seems to say I have cast wheels, not spoked. Think I will leave replacing my warped disks until it gets a bit warmer and I can take a bolt out at night to measure it.

 

[buncobooth]

Now it does get confusing...
I spent a few more minutes on the EPC ...
I have 2008 MU 1200 GSA, mine from new. It comes, standard with cross spoke wheels, but when I delved into the filter conditions, X771A = with Crossed Spoke wheels and it said my bike (going by specific VIN) not have them - WTF?
So EPC seems to say I have cast wheels, not spoked. Think I will leave replacing my warped disks until it gets a bit warmer and I can take a bolt out at night to measure it.

This is exactly the issue I am having. One of the dealers told me the shorter 22mm ones are correct as they had a bike in the workshop with the disks off so they checked. I ended up ordering both types, I will see which ones they are when they come out but I suspect the Countersunk screw M8X22 10.9 MK 10 34117701390 are the right ones. For some reason my VIN does not show the spoked wheel option even though these are the standard on the GSA.

 

[buncobooth]

Is it possible the 22mm are for the rear disc? Just asking, but the carrier is not especially thick.

No the rear ones are
Torx screw M8X15,5 ZNS3 MK 5 33177709205

 

[Magwych]

I removed and measured mine to fit new disks: 22mm in length. 27 mm would bottom out in the holes...

 

[buncobooth]

I removed and measured mine to fit new disks: 22mm in length. 27 mm would bottom out in the holes...

I thought as much, thanks for the info. By the way what does "MU" mean ?

 

[ninjarich1971]

I believe it's model update as opposed to technical update on the TU