We’re taking a short break!


From October 27th to October 31st, 2025, we’ll be on company holidays.

 

All orders placed by October 24th at 3:00 p.m. will be shipped the same day!


Our online shop remains open around the clock – 24/7!

 

Starting November 3rd, 2025, we’ll be back and will process all orders as quickly as possible.

 

Your Siebenrock Team

 

Jump to main content
Categories

Repair kit Brakemaster cylinder 17mm

BMW R 90S, R 80/7, R 100 models

3431927_1
Please inform me as soon as the product is available again.

€109.00

Prices incl. VAT, plus shipping costs

  • part no.: 3431927
Description Downloads 1 Evaluations 0
Description
Brake mastercCylinder kit - includes 17mm piston, all seals and Circlips. Repairing instead of... more
Close menu
Repair kit Brakemaster cylinder 17mm
Brake mastercCylinder kit - includes 17mm piston, all seals and Circlips.

Repairing instead of replacing is the motto of this clever repair solution for the master cylinder of the two-valve Boxer: The complete "inner workings" are replaced in just one step and the brake is tight, smooth-running and safe again.

TIP
You can find the specifications for your piston diameter on the underside of the master brake cylinder.

ATTENTION:
Only for repair in a specialist workshop!

Price for set.

For classic BMW two-valve Boxer models
R 90S, R 80/7, R 100/7 , R 100T, R 100S, R 100RS, R 100RT starting from 1975.

Compare 34 31 1 234 927 / 34311234927

Information on product safety
Fits for BMW R2V: R 90/6, R 90S, R 80 up to 84, R 100 up to 84
Downloads 1
more
Schließen
Downloads "Repair kit Brakemaster cylinder 17mm"
Evaluations 0
Read, write and discuss reviews... more
Close menu
Customer evaluation for "Repair kit Brakemaster cylinder 17mm"
Write an evaluation
Evaluations will be activated after verification.

The fields marked with * are required.

Customers also bought Customers also viewed
Customers also bought
Artikelbild Brake pads
Brembo
BMW /6, /7 models
Front
€39.50
Prices incl. VAT, plus shipping costs
Part no. 3411358L
NEW
3411709_1 Gasket Set
ATE brake caliper Ø 40mm
BMW /6, /7 models
€35.80
Prices incl. VAT, plus shipping costs
Part no. 3411709
Artikelbild Valve cover gasket
BMW 2-valve Boxer models
€3.95
Prices incl. VAT, plus shipping costs
Part no. 1112426
NEW
3421233_1 Brakemaster cylinder
Repair kit
BMW R 100 models
Rear
€44.95
Prices incl. VAT, plus shipping costs
Part no. 3421233
Artikelbild Brake line stainless steel
BMW /6, /7 models up to 9/80
With dual disc brake
€91.50
Prices incl. VAT, plus shipping costs
Part no. 3432699s
Artikelbild Brake line stainless steel
Rear brake disc
BMW R 100S, R 100RS, R 100RT
€39.00
Prices incl. VAT, plus shipping costs
Part no. 3432759
Artikelbild Idle switch
For 5-speed gearbox
BMW 2v Boxer models from 9/75 on

€19.95
Prices incl. VAT, plus shipping costs
Part no. 6131097
Artikelbild Airfilter
Mahle
BMW 2-valve Boxer models up to 9/80
LX194
€13.25
Prices incl. VAT, plus shipping costs
Part no. 1372382
Artikelbild Gasket Set
For Karcoma fuel tap
BMW 2-valve Boxer models

€12.95
Prices incl. VAT, plus shipping costs
Part no. 1612869
Artikelbild Bearing wheel / swingarm
BMW 2V Boxer models
40x17x14
€21.90
Prices incl. VAT, plus shipping costs
Part no. 0711005
Artikelbild Brake line stainless steel
With dual disc brake
BMW /6, /7 models up to 9/80
€88.50
Prices incl. VAT, plus shipping costs
Part no. 3432699
Artikelbild Fork tube seal
BMW 2-valve Boxer models
€6.95
Prices incl. VAT, plus shipping costs
Part no. 3142001
Artikelbild Sealing rings for inspection
BMW 2V Boxer models
€5.75
Prices incl. VAT, plus shipping costs
Part no. 0711333
Artikelbild Precision feeler gauges
BMW motorcycle
0.05 - 0.50
€5.55
Prices incl. VAT, plus shipping costs
Part no. 7170654
Artikelbild Oilfilter Set
Mahle
BMW 2v Boxer models without oilcooler
OX37D two-piece
€14.30
Prices incl. VAT, plus shipping costs
Part no. 1142145
Artikelbild Brake pipe
BMW 2v Boxer from 9/73 up to 9/80
Rigid Below Left
€27.90
Prices incl. VAT, plus shipping costs
Part no. 3432405
Artikelbild Spring
BMW /6, /7 models
For ATE brake caliper
€9.75
Prices incl. VAT, plus shipping costs
Part no. 3411513
Artikelbild Piston Ring Set
1000cc / 860cc
BMW 2V Boxer models
€37.95
Prices incl. VAT, plus shipping costs
Part no. 1125399
Artikelbild Clutch disc
MCC600 Lucas
BMW 2v Boxer models from 9/80 on

€89.50
Prices incl. VAT, plus shipping costs
Part no. 2121512L
Artikelbild Gasket kit carburetor
BING carburetor 94/40
BMW 2V Boxer Models
With diaphragm
€99.50
Prices incl. VAT, plus shipping costs
Part no. 1311902
Artikelbild Float
BING carburator 64/26, 64/28, 64/32, 94/40
BMW 2-valve Boxer models
€25.80
Prices incl. VAT, plus shipping costs
Part no. 1311766
Artikelbild Bearing shell conrod
BMW 2v Boxer models
Standard sized
€12.50
Prices incl. VAT, plus shipping costs
Part no. 1124460
Artikelbild Choke cable
Left side
BMW 2-valve Boxer models
26/32/40mm Bing carb Bottom
€17.76
Prices incl. VAT, plus shipping costs
Part no. 1323976
Artikelbild O-ring seal brake pads
For ATE brake system Front
BMW /6, /7 models
€3.95
Prices incl. VAT, plus shipping costs
Part no. 3411120
NEW
3431925_1 Repair kit Brake master cylinder 16mm
BMW R 75/6, R 90/6, R 90S

€109.00
Prices incl. VAT, plus shipping costs
Part no. 3431925
Artikelbild Gear shifter unit
Repair kit
BMW 2-valve Boxer models from 9/75 on
€27.25
Prices incl. VAT, plus shipping costs
Part no. 2331910
Artikelbild Brembo brake caliper
Repair kit
BMW 2-valve Boxer models
38mm
€69.90
Prices incl. VAT, plus shipping costs
Part no. 3411188
Artikelbild Valve Cover Retro
BMW 2v Boxer models
Black Semi-matt
€89.90
Prices incl. VAT, plus shipping costs
Part no. 1112246
Artikelbild Sticker 600cc battery cover
BMW R 60/5, R 60/6, R 60/7
€11.80
Prices incl. VAT, plus shipping costs
Part no. 4663081
Artikelbild Indicator light cover
With symbols
BMW R 65GS, R 80G/S, R 80GS, R 100GS, R 80GS Basic
€27.95
Prices incl. VAT, plus shipping costs
Part no. 6221754
Artikelbild Gear shift bellows
BMW 2-valve Boxer models
€16.80
Prices incl. VAT, plus shipping costs
Part no. 2341746
Artikelbild Oil drain plug engine
BMW 2-valve Boxer models
Magnetic M 18x1,5
€9.80
Prices incl. VAT, plus shipping costs
Part no. 0711143
Artikelbild Pushrod tube seal
18mm
BMW 2v Boxer models from 9/75 on
€3.95
Prices incl. VAT, plus shipping costs
Part no. 1132995
Artikelbild Breaker contact
With long wiring
BMW 2v Boxer models up to 9/78

€14.25
Prices incl. VAT, plus shipping costs
Part no. 1211555
Artikelbild Brake pipe
BMW 2v Boxerr from 9/73 up to 9/80
Rigid Below Right
€27.90
Prices incl. VAT, plus shipping costs
Part no. 3432406
Artikelbild Shifter shaft seal
BMW 2-valve Boxer models
€5.70
Prices incl. VAT, plus shipping costs
Part no. 2312740
Artikelbild Instrument housing Rubber ring
BMW 2v Boxer models
€12.95
Prices incl. VAT, plus shipping costs
Part no. 6211676
Artikelbild Crankshaft seal
BMW 2-valve models
Rear
€21.95
Prices incl. VAT, plus shipping costs
Part no. 1111739
Artikelbild Oil pan gasket
BMW 2-valve Boxer models
€6.95
Prices incl. VAT, plus shipping costs
Part no. 1113427
Artikelbild Brake shoes
Lucas / TRW MCS 940
BMW 2v Boxer models up to 9/1980
Rear
€64.40
Prices incl. VAT, plus shipping costs
Part no. 3421083L
Customers also viewed
NEW
3431379_1 Brake master cylinder 17mm
BMW 2-valve Boxer from 9/75 on
€459.00
Prices incl. VAT, plus shipping costs
Part no. 3431379
NEW
3421233_1 Brake master cylinder
Repair kit
BMW R 100 models
Rear
€109.00
Prices incl. VAT, plus shipping costs
Part no. 3421791
NEW
3421233_1 Brakemaster cylinder
Repair kit
BMW R 100 models
Rear
€44.95
Prices incl. VAT, plus shipping costs
Part no. 3421233
NEW
3431925_1 Repair kit Brake master cylinder 16mm
BMW R 75/6, R 90/6, R 90S

€109.00
Prices incl. VAT, plus shipping costs
Part no. 3431925
NEW
3431924_1 Brake master cylinder 14mm Repair kit
BMW R 75/6, R 90/6 bs 9/1975
€109.00
Prices incl. VAT, plus shipping costs
Part no. 3431924
3317546_1 Swingarm bearing
BMW 2v Boxer models from 9/80 on
40x17x17
€38.90
Prices incl. VAT, plus shipping costs
Part no. 3317546
Artikelbild Brake pads
Brembo
BMW /6, /7 models
Front
€39.50
Prices incl. VAT, plus shipping costs
Part no. 3411358L
2341639_1 Pivot bolt for gearshift lever
BMW 2-valve Boxer models
€22.50
Prices incl. VAT, plus shipping costs
Part no. 2341639
Artikelbild Cylinder. Right side
Siebenrock Power Kit 860cc
BMW R 45 and R 65 models up to 9/1980
€329.00
Prices incl. VAT, plus shipping costs
Part no. 1100866R
NEW
3312938_1 Final Drive Large Shaft Seal
BMW 2V Boxer models from 9/80 on
With single-sided swingarm
€31.30
Prices incl. VAT, plus shipping costs
Part no. 3312938
1311409_1 Tension spring for choke lever
BING carburetor 94/40
BMW 2V Boxer Models
€9.15
Prices incl. VAT, plus shipping costs
Part no. 1311409
1311606_1 Tension spring for throttle
BING carburetor 64/26, 64/28, 64/32
BMW 2V Boxer Models
€6.75
Prices incl. VAT, plus shipping costs
Part no. 1311606
1311908_1 Throttle return spring
BING carburetor 64/32
BMW /5, /6, /7 models
€4.75
Prices incl. VAT, plus shipping costs
Part no. 1311908
1311370_1 Tension spring for choke lever
BING carburetor
64/26, 64/28, 64/32, 94/40
BMW 2V Boxer Models
€5.95
Prices incl. VAT, plus shipping costs
Part no. 1311370
1311973_1 Atomizer
BING carburettor 64/32, 94/40
BMW 2V Boxer models
€12.90
Prices incl. VAT, plus shipping costs
Part no. 1311973
1311320_1 Clamping spring float needle
BING carburetor 64/32, 92/40
BMW 2V Boxer models
€3.50
Prices incl. VAT, plus shipping costs
Part no. 1311320
1311771_1 Clamping spring for nozzle needle
BING carburetor 64/32, 90/40
BMW R 75, R 100 models
€4.75
Prices incl. VAT, plus shipping costs
Part no. 1311771
1311522_1 Nozzle needle
BING carburetor 94/40
BMW R 100 Paralever
€11.40
Prices incl. VAT, plus shipping costs
Part no. 1311522
1311692_1 Nozzle needle
BING carburetor 64/26, 64/28, 64/32
BMW 2V Boxer models
€11.40
Prices incl. VAT, plus shipping costs
Part no. 1311692
1311321_1 Nozzle needle
BING carburetor 94/40
BMW R 80, R 100 models
€11.40
Prices incl. VAT, plus shipping costs
Part no. 1311321
1311585_1 Throttle Shaft
BING Carburetor 64/32
BMW 2V Boxer models
€24.50
Prices incl. VAT, plus shipping costs
Part no. 1311585
1311746_1 Throttle body
BING carburetor 94/40
BMW R 100, Monolever, Paralever
€15.50
Prices incl. VAT, plus shipping costs
Part no. 1311746
1311730_1 Atomizer
BING carburetor 1/26, 64/32
BMW R 50, R 60, R 75 models
€11.50
Prices incl. VAT, plus shipping costs
Part no. 1311730
1311914_1 Needle Nozzle 2.68
BING Carburetor 1/26
BMW R 50/5, R 60/5, R60/6, R 60/7
€12.95
Prices incl. VAT, plus shipping costs
Part no. 1311914
NEW
1811442_1 Manifold
40mm Chrome
BMW R 100RS, R 100RT, R 100S
Right side

€198.00
Prices incl. VAT, plus shipping costs
Part no. 1811442
NEW
1811441_1 Manifold
40mm Chrome
BMW R 100RS, R 100RT, R 100S
Left side

€198.00
Prices incl. VAT, plus shipping costs
Part no. 1811441
NEW
Artikelbild Bearing shell conrod
+0,02 Standard sized
BMW 2V Boxer models
€12.50
Prices incl. VAT, plus shipping costs
Part no. 1124461
NEW
Artikelbild Bearing shell connecting rod
+0,50 2.Oversize
BMW 2V Boxer models
€12.50
Prices incl. VAT, plus shipping costs
Part no. 1124420
NEW
Artikelbild Bearing shell connecting rod
+0,25 1.Oversize
BMW 2V Boxer models
€12.50
Prices incl. VAT, plus shipping costs
Part no. 1124419
NEW
3431960_1 Rear brake master cylinder
BMW R 100 models
Rear
€389.00
Prices incl. VAT, plus shipping costs
Part no. 3431960
NEW
3411709_1 Gasket Set
ATE brake caliper Ø 40mm
BMW /6, /7 models
€35.80
Prices incl. VAT, plus shipping costs
Part no. 3411709
NEW
3411705_1 Gasket Set
ATE brake caliper Ø 38mm
BMW R 75/6, R 90/6, R 90S
€35.80
Prices incl. VAT, plus shipping costs
Part no. 3411705
NEW
3431926_1 Repair kit Brake master cylinder 14mm
BMW /6, /7 models from 9/1975 on

€109.00
Prices incl. VAT, plus shipping costs
Part no. 3431926
NEW
1100423_1 Engine gasket Set
BMW R 45, R 65, R 65LS, R 65GS, R 65 Monolever
€139.00
Prices incl. VAT, plus shipping costs
Part no. 1100423
NEW
1372360_1 Intake rubber carburetor
D=40mm/54mm
BMW R 100RS, R 100RT Monolever

€15.50
Prices incl. VAT, plus shipping costs
Part no. 1372360
NEW
1372392_1 Intake rubber carburetor
D=50mm/60mm
BMW 2-valve Boxer models

€13.50
Prices incl. VAT, plus shipping costs
Part no. 1372392
2321516_1 Drive shaft
BMW 2v Boxer models from 9/74 up to 9/80
D=18mm 5-speed
€239.00
Prices incl. VAT, plus shipping costs
Part no. 2321516
Artikelbild Swing Arm Boot
BMW 2-valve Boxer models
€19.95
Prices incl. VAT, plus shipping costs
Part no. 3317304
Artikelbild Valve Intake
34mm
BMW R 50/5
€26.75
Prices incl. VAT, plus shipping costs
Part no. 1134118
1231107D_1 Diode board Replacement
270W
BMW 2-valve Boxer models

€98.00
Prices incl. VAT, plus shipping costs
Part no. 1231107D
Viewed