BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


duck

duck
Life time member
Life time member
The min spec for K100RS4V/K1/K1100 front rotors is 4.50mm.  From my experience you'll hit this somewhere around 50-60K miles. As you'd expect, buying new replacement rotors from a BMW dealer is insanely expensive and as of today the price for a pair is $1,043.94.
 
Motobins sells Brembo complete replacement rotors for £125 each.(without VAT) The Motobins site says they're Grimeca rotors but they come in Brembo boxes and they can be found online under the Brembo part number B408.46. Although they are "complete" rotors with both carrier and rotor you'll need to re-use the ABS ring from your old BMW rotors.
 
Here's what they look like installed:
K1 K100RS4V K1100 - Replacement front brake rotors BJN5TkT
 
 
James Sherlock also sells replacement rotors. These are just the rotors though (no carriers) and are Hekkane part 011904.  Sherlock lists them on ebay but you can get a better price if you order them from the James Sherlock website where the price is £44 each. (without VAT)
 
Since these are just the rotors you'll need to re-use your factory carriers and probably want to use new bobbins as well.  Both Motobins and Sherlock sell bobbins that are stainless steel and probably hold up much better than the aluminum alloy OEM bobbins. And of course they cost a lot less than BMW bobbins.
 
My personal preference is the rotors from Sherlock since they have angled ventilation holes like the OEM rotors but I don't think you could go wrong using the Brembo rotors from Motobins which will be easier to install since they're complete with the rotors already mounted on carriers.
 
Note that the Sherlock site specifically states that they don't ship to the US but I decided to try anyhow and after purchasing the rotors they sent me a PayPal invoice for £27.60 to cover the shipping cost. After I paid the shipping (via DHL) it only took five days for them to get to me in the US.  Motobins usually takes about seven days via Royal Mail so delivery time is roughly the same.
 
I have not installed the Hekkane rotors from Sherlock yet but here's what they look like naked:
K1 K100RS4V K1100 - Replacement front brake rotors CZYmhKK


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

Stumpy

Stumpy
Silver member
Silver member
The ventilation holes might be different, but I think I would go with the Brembo rotors. Less faffing around and they are Brembo.

    

92KK 84WW Olaf

avatar
Life time member
Life time member
The brakes are Brembo and its a fair bet Brembo actually make the 'BMW' rotors anyway.

Just like buying a 'BMW' clutch plate...made by Sachs....


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

brickrider2

brickrider2
Life time member
Life time member
Those are stunning price differences!  Am I the only person who finds those margins offensive?


__________________________________________________
1996 K1100LT
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Finding the margins on OEM parts offensive is the first part...

...Finding alternatives is the second.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

MartinW

MartinW
Life time member
Life time member
When cheap parts crop up it can be a smart move to buy them. Especially the hard to get parts like lenses, lights, switches and even body panels.

Regards Martin.


__________________________________________________
K75s Hybrid
    

Dai

Dai
Life time member
Life time member
@MartinW wrote:When cheap parts crop up it can be a smart move to buy them.
Is why I have two sets of cast-iron rotors in the cupboard... too cheap to resist... Twisted Evil And that full set of Alaska Blue bodywork I just bought... and... and... Dammit, the garage roof is almost full Sad


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum