BMW K bikes (Bricks)

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Bonzo

Bonzo
Platinum member
Platinum member
I'm replacing my worn out oe rear disc with a new EBC from Motorworks. I've managed to removed the 3 screws without any trouble, but prizing the ring off is proving a little more tricky.

So far, Ive had the disc in the oven for half an hour (along with a wonderful Marks & Spencers Chargrilled Vegetable Pasta Bake - in case you were wondering), but I'm mindful of damaging the relatively soft alloy teeth of the ABS ring. I can confirm they mark easily. Flat head screw driver seems to be the likely tool, but the thing aint budging. So, before I completely bollocks up this ring, any tips?


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1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Heat is your friend, along with a delish Marks & Sparks meal afterwards. The ring will eventually break free. Do you have a more focused point of heat like a heat gun or propane flame?


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Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei  - Beemers owned still or sold.

    

Bonzo

Bonzo
Platinum member
Platinum member
I do indeed possess a heat gun (both electric & fire stuff).

Perhaps the oven method warmed the entire assembly up, instead of focusing just on the ring. (forgot the garlic bread though).

I'll give that a bash  Tips on removing abs ring from rear rotor? 112350


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1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Bonzo

Bonzo
Platinum member
Platinum member
Its off  bounce Cheers TWB.

Phew, that's not a job I'd like to do regularly.

When it comes to putting the ring back on the new rotor, does it need anything between the surfaces or just metal to metal? 

I'll dab some thread lock on the 3 screws & the 2 counter sunk screws.

Cheers

Bonz



Last edited by Bonzo on Mon Jun 15, 2020 7:03 pm; edited 1 time in total


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
I'd just make certain the two mating surfaces are clean. You could dab a bit of anti-seize in there for ease of separation later on. I'd do that with the two countersunk screws as well. They're not going anywhere so threadlock is overkill.


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei  - Beemers owned still or sold.

    

Dai

Dai
Life time member
Life time member
- Put the disc in the freezer for 48 hours.
- Heat the ABS ring up
- Drop the ring on the disc
- Run the screws in to pull it all the way down
- Have a brew while waiting for the temperatures to stabilise.

Old trick for putting crankcase bearings in but with a suitably modified description.


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'83 K100 upgraded to K100RS spec, '87 K100RT
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California
    

Gaz

Gaz
Life time member
Life time member
That is a job to be done when, in may case anyway, the lady of the house was out as the freezer and the oven are both in the kitchen so the job was done on the kitchen floor immediately in front of the oven.

As per Dai's instructions, mind you I did put the disk in a zip lock plastic bag for domestic political purposes while in the freezer and I heated the ring at 200 deg C for an hour in the oven.

The ring drops straight on. At least it doesn't have to be done regularly as it will take a while to wear out those EBC disks.

Cheers


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Gaz
1990 K75 6427509; 1987 R80G/S PD 6292136; 2010 G650GS ZW13381; 95 K1100LT 0232224
    

RicK G

RicK G
VIP
VIP
+1 on what Gaz said ("what are those funny marks on the pot holders" she said "Fucknose" said I and went back out to the shed Tips on removing abs ring from rear rotor? 652573


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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

Bonzo

Bonzo
Platinum member
Platinum member
Thanks very much for your advice guys. Really appreciate it  cheers

I'd never have thought of putting the disc in the freezer.


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

Bonzo

Bonzo
Platinum member
Platinum member
The new (EBC) disc arrived today from Motorworks. Have to say, I'm very impressed with the quality. Will definately be investing in the fronts later later in the year  Tips on removing abs ring from rear rotor? 112350


__________________________________________________
1990 K100RS 4V (VIN# 6406682)
2017 R1200RS SE Sport
    

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