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ATE 14mm front brake master cylinder and reservoir single disc from 09/1975 | BRA34381

Fits these models:

fitsR100/7 (09/1976 - 08/1977)

fits R100/7 (09/1977 - 08/1978)

fits R100RT (09/1978 - 08/1980)

fits R100T (09/1978 - 08/1980)

fits R60/7 (09/1976 - 08/1977)

fits R60/7 (09/1977 - 08/1978)

fits R60/7 (09/1978 - 08/1979)

fits R60/7 Police (09/1978 - 08/1980)

fits R75/6 (09/1975 - 08/1976)

fits R75/7 (01/1979 - 01/1979)

fits R75/7 (09/1976 - 08/1977)

fits R75/7 (09/1977 - 08/1978)

fits R80 (09/1977 - 08/1978)

fits R80 (09/1978 - 08/1980)

fits R90/6 (09/1975 - 08/1976)

Fits R100/7 (09/1976 - 08/1977), R100/7 (09/1977 - 08/1978), R100RT... Show All...

Associated BMW part: 34311234381 (34 31 1 234 381)

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This item fits single disc versions of the bikes listed.  See BRA34926 for the respective overhaul kit.
This master cylinder works in conjunction with the the 12mm cable nipple holder CAA34855 , and so requires a post 09/1975 type brake cable to work.  
£316.01 INC VAT
£263.34 EX VAT

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ATE 16mm front brake master cylinder and reservoir twin disc pre 09/1975 | BRA33955

Fits these models:

fitsR75/6 (09/1973 - 08/1974)

fits R75/6 (09/1974 - 08/1975)

fits R90/6 (09/1973 - 08/1974)

fits R90/6 (09/1974 - 08/1975)

fits R90S (09/1973 - 08/1974)

fits R90S (09/1974 - 09/1975)

Fits R75/6 (09/1973 - 08/1974), R75/6 (09/1974 - 08/1975), R90/6 (09/1973... Show All...

Associated BMW part: 34311233955 (34 31 1 233 955)

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Originally fitted as standard to the R90S, and offered as part of the optional twin disc kit for the R75/6 and R90/6, this master cylinder was used until 09/1975.  It uses the 8mm cable nipple holder CAA30404 to attach the brake cable to the master cylinder actuation arm.  
£324.00 INC VAT
£270.00 EX VAT

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ATE 17mm front brake master cylinder and reservoir twin disc from 09/1975 | BRA34379

Fits these models:

fitsR100/7 (09/1976 - 08/1977)

fits R100/7 (09/1977 - 08/1978)

fits R100RS (09/1976 - 08/1977)

fits R100RS (09/1977 - 08/1978)

fits R100RS (09/1978 - 08/1980)

fits R100RT (09/1978 - 08/1980)

fits R100S (09/1976 - 08/1977)

fits R100S (09/1977 - 08/1978)

fits R100S (09/1978 - 08/1980)

fits R100T (09/1978 - 08/1980)

fits R60/7 (09/1976 - 08/1977)

fits R60/7 (09/1977 - 08/1978)

fits R60/7 (09/1978 - 08/1979)

fits R60/7 Police (09/1978 - 08/1980)

fits R75/6 (09/1975 - 08/1976)

fits R75/7 (01/1979 - 01/1979)

fits R75/7 (09/1976 - 08/1977)

fits R75/7 (09/1977 - 08/1978)

fits R80 (09/1977 - 08/1978)

fits R80 (09/1978 - 08/1980)

fits R80 Police (02/1979 - 12/1979) 0384

fits R80 Police (06/1978 - 07/1978)

fits R80 Police (08/1978 - 08/1978)

fits R80 Police (09/1978 - 08/1980) 0383

fits R90/6 (09/1974 - 08/1975)

fits R90/6 (09/1975 - 08/1976)

fits R90S (10/1975 - 08/1976)

Fits R100/7 (09/1976 - 08/1977), R100/7 (09/1977 - 08/1978), R100RS... Show All...

Associated BMW part: 34311234379 (34 31 1 234 379)

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Standard fitment on R100S, T, RS and RT models, and part of the optional twin disc kit on others.
This master cylinder works in conjunction with the the 12mm cable nipple holder CAA34855 , and so requires a post 09/1975 type brake cable to work.
We do sometimes have good second hand options too, or you may wish to consider a conversion to the later handlebar mounted Brembo setup.  
£310.01 INC VAT
£258.34 EX VAT

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ATE 14mm under tank master cylinder overhaul kit pre 09/1975 | BRA34924

Fits these models:

fitsR75/6 (09/1973 - 08/1974)

fits R75/6 (09/1974 - 08/1975)

fits R90/6 (09/1973 - 08/1974)

fits R90/6 (09/1974 - 08/1975)

Fits R75/6 (09/1973 - 08/1974), R75/6 (09/1974 - 08/1975), R90/6 (09/1973... Show All...

Associated BMW part: 34311234924 (34 31 1 234 924)

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This kit is for the 14mm master cylinder fitted as standard to single disc R75/6 and R90/6 until 09/1975; on this type of master cylinder, the fluid reservoir is retained by a 7mm hex bolt and a steel clip. £70.67 INC VAT
£58.89 EX VAT

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ATE 14mm under tank master cylinder overhaul kit from 09/1975 | BRA34926

Fits these models:

fitsR100/7 (09/1976 - 08/1977)

fits R100/7 (09/1977 - 08/1978)

fits R100RT (09/1978 - 08/1980)

fits R100T (09/1978 - 08/1980)

fits R60/7 (09/1976 - 08/1977)

fits R60/7 (09/1977 - 08/1978)

fits R60/7 (09/1978 - 08/1979)

fits R60/7 Police (09/1978 - 08/1980)

fits R75/6 (09/1975 - 08/1976)

fits R75/7 (01/1979 - 01/1979)

fits R75/7 (09/1976 - 08/1977)

fits R75/7 (09/1977 - 08/1978)

fits R80 (09/1977 - 08/1978)

fits R80 (09/1978 - 08/1980)

fits R90/6 (09/1975 - 08/1976)

Fits R100/7 (09/1976 - 08/1977), R100/7 (09/1977 - 08/1978), R100RT... Show All...

Associated BMW part: 34311234926 (34 31 1 234 926)

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This is for the 14mm master cylinder fitted from 09/1975; the brake fluid reservoir on this type is retained by a single large steel plug that takes a 6mm allen key.
£70.67 INC VAT
£58.89 EX VAT

ATE 16mm under tank master cylinder overhaul kit pre 09/1975 | BRA34925

Fits these models:

fitsR75/6 (09/1973 - 08/1974)

fits R75/6 (09/1974 - 08/1975)

fits R90/6 (09/1973 - 08/1974)

fits R90/6 (09/1974 - 08/1975)

fits R90S (09/1973 - 08/1974)

fits R90S (09/1974 - 09/1975)

Fits R75/6 (09/1973 - 08/1974), R75/6 (09/1974 - 08/1975), R90/6 (09/1973... Show All...

Associated BMW part: 34311234925 (34 31 1 234 925)

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This kit is for the 16mm master cylinder fitted to twins built before 09/1975, as per BRA33955; on this type of master cylinder, the fluid reservoir is retained by a 7mm hex bolt and a steel clip.
Later models use BRA34927 , which contains a 17mm piston.
£61.60 INC VAT
£51.33 EX VAT

ATE 17mm under tank master cylinder overhaul kit from 09/1975 | BRA34927

Fits these models:

fitsR100/7 (09/1976 - 08/1977)

fits R100/7 (09/1977 - 08/1978)

fits R100RS (09/1976 - 08/1977)

fits R100RS (09/1977 - 08/1978)

fits R100RS (09/1978 - 08/1980)

fits R100RT (09/1978 - 08/1980)

fits R100S (09/1976 - 08/1977)

fits R100S (09/1977 - 08/1978)

fits R100S (09/1978 - 08/1980)

fits R100T (09/1978 - 08/1980)

fits R60/7 (09/1976 - 08/1977)

fits R60/7 (09/1977 - 08/1978)

fits R60/7 (09/1978 - 08/1979)

fits R60/7 Police (09/1978 - 08/1980)

fits R75/6 (09/1975 - 08/1976)

fits R75/7 (01/1979 - 01/1979)

fits R75/7 (09/1976 - 08/1977)

fits R75/7 (09/1977 - 08/1978)

fits R80 (09/1977 - 08/1978)

fits R80 (09/1978 - 08/1980)

fits R80 Police (02/1979 - 12/1979) 0384

fits R80 Police (06/1978 - 07/1978)

fits R80 Police (08/1978 - 08/1978)

fits R80 Police (09/1978 - 08/1980) 0383

fits R90/6 (09/1974 - 08/1975)

fits R90/6 (09/1975 - 08/1976)

fits R90S (10/1975 - 08/1976)

Fits R100/7 (09/1976 - 08/1977), R100/7 (09/1977 - 08/1978), R100RS... Show All...

Associated BMW part: 34311234927 (34 31 1 234 927)

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Fits R90S with 17mm master cylinder from 09/75, and all other twin disc models produced between 09/1975 and 09/1980. The brake fluid reservoir on this type is retained by a single large steel plug that takes a 6mm allen key. £55.28 INC VAT
£46.07 EX VAT

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ATE under tank master cylinder small reservoir O ring pre 09/1975 | BRA54738

Fits these models:

fitsR75/6 (09/1973 - 08/1974)

fits R75/6 (09/1974 - 08/1975)

fits R90/6 (09/1973 - 08/1974)

fits R90/6 (09/1974 - 08/1975)

fits R90S (09/1973 - 08/1974)

fits R90S (09/1974 - 09/1975)

 BRA54738 also used as:

Close X

Fits R75/6 (09/1973 - 08/1974), R75/6 (09/1974 - 08/1975), R90/6 (09/1973... Show All...

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This is the smaller of the two O rings that seal the reservoir to the master cylinder body on ATE master cylinders produced before 09/1975.
Please see BRA34999 for the larger O ring.
£1.20 INC VAT
£1.00 EX VAT

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ATE under tank master cylinder large reservoir O ring pre 09/1975 | BRA34999

Fits these models:

fitsR75/6 (09/1973 - 08/1974)

fits R75/6 (09/1974 - 08/1975)

fits R90/6 (09/1973 - 08/1974)

fits R90/6 (09/1974 - 08/1975)

fits R90S (09/1973 - 08/1974)

fits R90S (09/1974 - 09/1975)

Fits R75/6 (09/1973 - 08/1974), R75/6 (09/1974 - 08/1975), R90/6 (09/1973... Show All...

view larger image Larger Image
This is the larger of the two O rings that seal the reservoir to the master cylinder body on ATE master cylinders produced before 09/1975.
Please see BRA54738 for the smaller O ring.
£1.44 INC VAT
£1.20 EX VAT

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ATE brake master cylinder reservoir O ring from 09/1975 | BRA34928

Fits these models:

fitsR100/7 (09/1976 - 08/1977)

fits R100/7 (09/1977 - 08/1978)

fits R100RS (09/1976 - 08/1977)

fits R100RS (09/1977 - 08/1978)

fits R100RS (09/1978 - 08/1980)

fits R100RT (09/1978 - 08/1980)

fits R100S (09/1976 - 08/1977)

fits R100S (09/1977 - 08/1978)

fits R100S (09/1978 - 08/1980)

fits R100T (09/1978 - 08/1980)

fits R60/7 (09/1976 - 08/1977)

fits R60/7 (09/1977 - 08/1978)

fits R60/7 (09/1978 - 08/1979)

fits R60/7 Police (09/1978 - 08/1980)

fits R75/6 (09/1975 - 08/1976)

fits R75/7 (01/1979 - 01/1979)

fits R75/7 (09/1976 - 08/1977)

fits R75/7 (09/1977 - 08/1978)

fits R80 (09/1977 - 08/1978)

fits R80 (09/1978 - 08/1980)

fits R80 Police (02/1979 - 12/1979) 0384

fits R80 Police (06/1978 - 07/1978)

fits R80 Police (08/1978 - 08/1978)

fits R80 Police (09/1978 - 08/1980) 0383

fits R90/6 (09/1974 - 08/1975)

fits R90/6 (09/1975 - 08/1976)

fits R90S (10/1975 - 08/1976)

Fits R100/7 (09/1976 - 08/1977), R100/7 (09/1977 - 08/1978), R100RS... Show All...

view larger image Larger Image
Not available separately from BMW, this O ring fits between the plastic fluid reservoir and the steel master cylinder body on ATE master cylinders fitted to bikes produced between 09/1975 and 09/1980. £2.04 INC VAT
£1.70 EX VAT

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