40 Years of Siebenrock – A Heartfelt Thank You!

 

Since 1985, the name Siebenrock has stood for quality, technical expertise, and genuine passion for classic BMW motorcycles.
Our success is built on continuous development, solid engineering knowledge,

and the ambition to create products that impress with functionality and durability.

  

A major milestone – and one we’d love to celebrate with you!

 

From July 4 to 16, 2025, enjoy a special anniversary discount on selected Siebenrock items in our online shop – it’s worth a look!

 

Or come see us in person at the BMW Motorrad Days in Garmisch-PartenkirchenJuly 4–6, 2025.

Visit our stand and receive an exclusive anniversary gift – a little surprise from us to you!

 

 Your Siebenrock Team

 

While supplies last.

 

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Alternator rotor
New part

BMW 2-valve Boxer models

Artikelbild
€114.65

Prices incl. VAT, plus shipping costs

Ready to ship today, Delivery time appr. 2-4 workdays within Germany

  • 1231641
Inexpensive alternative It's not really a matter of if, but rather a question of when the... more
Alternator rotor
New part
Inexpensive alternative

It's not really a matter of if, but rather a question of when the alternator Rotor on your boxer will fail. Once you have determined that you have a problem with your charging system, it's rather easy to determine if the rotor is the problem or a part of it, as long as you have access to an Ohm meter. Remove or insulate the brushes and test for continuity between the slip rings. If you instead have an open circuit then the rotor needs to be replaced or repaired.

There are several options available. BMW sells this part. There are expensive electronic conversions that claim to put an end to the problem once and for all. You can also purchase rebuilt rotors or have yours rewound.

The option that we offer is simple: This is a brand new, not re-built, European made rotor that will fit all model year 12 Volt boxers from /5 an onward. This is a high quality reproduction part that will offer many years of reliable services.

Price per piece.

For all classic BMW airhead models
R 50/5, R 60/5, R 75/5, R 60/6, R 75/6, R 90/6, R )0S, R 60/7, R 60T, R 75/7, R 75T, R 80/7, R 80/7N, R 80/7S, R 80, R 80N, R 80TN, R 80TS, R 100/7, R 100, R 100T, R 100S, R 100CS, R 100RS, R 100RT
R 45, R 45N, R 45S, R 45T, R 45NT, R 65, R 65T, R 65LS
Monolever models R 65, R 80, R 80RT, R 100RS, R 100RT
R 80G/S, R 65GS, R 80G/S PD, R 80ST
Paralever models
R 80GS, R 80 GS PD, R 100GS, R 100GS PD, R80R, R 80R Mystic, R 100R, R 100R Mystic.

Comparison 12311244642

Information on product safety
Fits for BMW R2V: R 50/5, R 60/5, R 75/5, R 60/6, R 75/6, R 90/6, R 90S, R 60/7, R 75/7, R 80 up to 84, R 100 up to 84, R 45 up to 84, R 65 up to 84, R 65 Mono from 85 on, R 80 Mono from 85 on, R 100 RS/RT Mono from 87 on, R 65GS 87-92, R 80 G/S,ST 80-87, R 80GS 87-96, R 100GS 87-96, R 80R 91-95, R 100R 91-95
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Artikelbild Diode board
BMW 2v Boxer models
€79.90
Prices incl. VAT, plus shipping costs
Part no. 1231062
Artikelbild Removing tool
Alternator
BMW 2-valve Boxer models
€6.90
Prices incl. VAT, plus shipping costs
Part no. 1231699
Artikelbild Brush Set
With connector
BMW 2-valve Boxer models
€9.50
Prices incl. VAT, plus shipping costs
Part no. 1231480S
Artikelbild Ring winding / strator
20A For Bosch alternator
BMW 2v Boxer models
€149.00
Prices incl. VAT, plus shipping costs
Part no. 1231041
Artikelbild Rubber mounts
Diode plate
BMW 2-valve Boxer models

€3.95
Prices incl. VAT, plus shipping costs
Part no. 1231131
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 Valve cover gasket
BMW 2-valve Boxer models
€3.95
Prices incl. VAT, plus shipping costs
Part no. 1112426
Artikelbild Valve cover Classic
BMW 2-valve Boxer models
€44.00 €49.75
Prices incl. VAT, plus shipping costs
Part no. 1112240
Artikelbild Hall sensor
BMW 2v Boxer models from 9/80 on
€129.90
Prices incl. VAT, plus shipping costs
Part no. 1200088
Artikelbild Airfilter
Mahle
BMW 2-valve Boxer models from 9/80 on
LX56
€25.25
Prices incl. VAT, plus shipping costs
Part no. 1372080
Artikelbild Grip rubber
Right side Square-cut Black
BMW 2-valve Boxer models
€9.99 €11.90
Prices incl. VAT, plus shipping costs
Part no. 3272812
Artikelbild Brush holder plate
For alternator
BMW 2v Boxer models

€74.25
Prices incl. VAT, plus shipping costs
Part no. 1231003
Artikelbild Valve guide
BMW 2V Boxer models
Not for R 45 and R 65
€14.30
Prices incl. VAT, plus shipping costs
Part no. 1112708
Artikelbild Strainer Fuel tap
Karcoma
BMW 2-valve Boxer models
€9.50
Prices incl. VAT, plus shipping costs
Part no. 1612112
Artikelbild Oilfilter Set
Mahle
BMW 2v Boxer models without oilcooler
OX37D two-piece
€14.25
Prices incl. VAT, plus shipping costs
Part no. 1142145
Artikelbild Exhaust star nut
BMW /7, Monoelver, Paralever models
With short fins
€37.20
Prices incl. VAT, plus shipping costs
Part no. 1821721
Artikelbild Oil pan gasket
BMW 2-valve Boxer models
€6.95
Prices incl. VAT, plus shipping costs
Part no. 1113427
Artikelbild Grip rubber
Left side Square-cut Black
BMW 2-valve Boxer models
€9.99 €11.90
Prices incl. VAT, plus shipping costs
Part no. 3272811
Artikelbild Float
BING carburator 64/26, 64/28, 64/32, 94/40
BMW 2-valve Boxer models
€21.15
Prices incl. VAT, plus shipping costs
Part no. 1311766
Artikelbild Breaker contact
With long wiring
BMW 2v Boxer models up to 9/78

€13.95
Prices incl. VAT, plus shipping costs
Part no. 1211555
Artikelbild Float chamber gasket
BING carburator
64/26, 64/28, 64/32, 94/40
BMW 2-valve Boxer models
€6.50
Prices incl. VAT, plus shipping costs
Part no. 1311764
Artikelbild Aternator housing
107mm
BW 2v Boxer models from 9/77 on

€129.00
Prices incl. VAT, plus shipping costs
Part no. 1231002
Artikelbild Voltage regulator
Standard
BMW 2-valve Boxer models

€42.90
Prices incl. VAT, plus shipping costs
Part no. 1232409S
Artikelbild Oilfilter Set
Mahle
BMW 2v Boxer models with oilcooler
OX36D two-piece
€14.90
Prices incl. VAT, plus shipping costs
Part no. 1142146
Artikelbild Transmission bearing Set
BMW 2-vakve Boxer models
5-speed gearbox
€78.00
Prices incl. VAT, plus shipping costs
Part no. 2312999
Artikelbild Cylinder gasket Set
From 9/1980 on
For Power Kit 1000cc, Replacement Kit
1000cc, BMW R 100 models from 9/80 on
€47.50
Prices incl. VAT, plus shipping costs
Part no. 1100101
Artikelbild Crankshaft seal
BMW 2v Boxer models
Front
€6.50
Prices incl. VAT, plus shipping costs
Part no. 1114011
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 Swing Arm Boot
BMW 2-valve Boxer models
€19.95
Prices incl. VAT, plus shipping costs
Part no. 3317304
Artikelbild Ground cable
Diode plate
BMW 2-valve Boxer models
€3.75
Prices incl. VAT, plus shipping costs
Part no. 1231130
Artikelbild Clutch switch / Stoplight switch
BMW 2v Boxer models
€29.95
Prices incl. VAT, plus shipping costs
Part no. 6131569
Artikelbild Stop light switch
BMW 2v Boxer models up to 9/84
€29.50
Prices incl. VAT, plus shipping costs
Part no. 6131684
Artikelbild Repair kit brake master cylinder 13mm
BMW 2-valve Boxer models
€63.90
Prices incl. VAT, plus shipping costs
Part no. 3272784R
Artikelbild Spark plug Bosch
WR7DC
BMW 2v Boxer models

€5.70
Prices incl. VAT, plus shipping costs
Part no. 1212485
Artikelbild Brush Set
Alternator
BMW 2-vave Boxer models

€5.70
Prices incl. VAT, plus shipping costs
Part no. 1231480
Artikelbild Shifter shaft seal
BMW 2-valve Boxer models
€4.90
Prices incl. VAT, plus shipping costs
Part no. 2312740
Artikelbild Clutch boot
Clutch pressure bearing
For BMW 2V, 4V, K models
€19.50
Prices incl. VAT, plus shipping costs
Part no. 2313731
Artikelbild Ignition control unit
BMW 2v Boxer models from 9/80 on
€89.00
Prices incl. VAT, plus shipping costs
Part no. 1214284
Artikelbild Clutch centering tool
BMW 2-valve Boxer models from 9/80 on
€15.80
Prices incl. VAT, plus shipping costs
Part no. 2123512Z
Artikelbild Fuel tap
Left side
BMW 2-valve Boxer models

€49.50
Prices incl. VAT, plus shipping costs
Part no. 1612113
Artikelbild Alternator rotor
Overhauled In exchange
BMW 2-valve Boxer models

€129.00
Prices incl. VAT, plus shipping costs
Part no. 1231642
Artikelbild Removing tool
Alternator
BMW 2-valve Boxer models
€6.90
Prices incl. VAT, plus shipping costs
Part no. 1231699
Artikelbild Voltage regulator
Electronic Metal housing
BMW 2-valve Boxer models
€42.90
Prices incl. VAT, plus shipping costs
Part no. 1232457
Artikelbild Ring winding / strator
20A For Bosch alternator
BMW 2v Boxer models
€149.00
Prices incl. VAT, plus shipping costs
Part no. 1231041
Artikelbild Diode board
BMW 2v Boxer models
€79.90
Prices incl. VAT, plus shipping costs
Part no. 1231062
Artikelbild Brush Set
With connector
BMW 2-valve Boxer models
€9.50
Prices incl. VAT, plus shipping costs
Part no. 1231480S
Artikelbild Voltage regulator
Adjustable
BMW 2-valve Boxer models

€54.00
Prices incl. VAT, plus shipping costs
Part no. 1232409E
NEW
1231107L_1 Alternator
BMW /6, /7 models
350W Lithium style battery compatible
€795.00
Prices incl. VAT, plus shipping costs
Part no. 1231107L
Artikelbild Hall sensor
BMW 2v Boxer models from 9/80 on
€129.90
Prices incl. VAT, plus shipping costs
Part no. 1200088
1231107D_1 Diode board Replacement
270W
BMW 2-valve Boxer models

€89.90
Prices incl. VAT, plus shipping costs
Part no. 1231107D
Artikelbild Fuel filler cap 101 style
BMW 2v Boxer models
€169.00
Prices incl. VAT, plus shipping costs
Part no. 5125119S
1231105_1 Alternator
BMW R 50/5, R 60/5, R 75/5
350W
€459.00
Prices incl. VAT, plus shipping costs
Part no. 1231105
Artikelbild Brake disc 2-2 perforation
Deep shape Siebenrock product
BMW R 45, R 65, R 65GS, R 80G/S, R 80G/S PD, R 80ST

€169.00 €219.00
Prices incl. VAT, plus shipping costs
Part no. 3411005
Artikelbild Brush Set
Alternator
BMW 2-vave Boxer models

€5.70
Prices incl. VAT, plus shipping costs
Part no. 1231480
3353110Y_1 Shock Set
BMW /5, /6 and /7 models
YSS Black edition
€389.00
Prices incl. VAT, plus shipping costs
Part no. 3353110Y
1241670A_1 Starter HD
BMW 2-valve Boxer models from 9/74 on
New part
€169.00
Prices incl. VAT, plus shipping costs
Part no. 1241670A
Artikelbild Oilfilter Set
Mahle
BMW 2v Boxer models without oilcooler
OX37D two-piece
€14.25
Prices incl. VAT, plus shipping costs
Part no. 1142145
Artikelbild Oilfilter Set
Mahle
BMW 2v Boxer models with oilcooler
OX36D two-piece
€14.90
Prices incl. VAT, plus shipping costs
Part no. 1142146
Artikelbild Camshaft gasket Set
BMW 2v Boxer models from 9/78 on
€18.60
Prices incl. VAT, plus shipping costs
Part no. 1114444
Artikelbild Double ignition
Silent Hektik
BMW 2v Boxer models from 9/78 on

€599.00
Prices incl. VAT, plus shipping costs
Part no. 1200100
Artikelbild Power Kit Extra 1000cc 97mm
Plug & Play
BMW R 75/5, R 75/6, R 90/6 , R 90S up to 9/7
€999.00 €1,159.00
Prices incl. VAT, plus shipping costs
Part no. 1100072
Artikelbild Valve intake
42mm
BMW 2v Boxer models from R 75/5 on
Not for R 45 and R 65
€25.90
Prices incl. VAT, plus shipping costs
Part no. 1134234
Artikelbild Seat /5
Short swing arm
BMW R 50/5, R 60/5, R 75/5
€598.00
Prices incl. VAT, plus shipping costs
Part no. 5255530
Artikelbild Valve Exhaust
40mm
BMW R 80, R 90, R 100 models
45°
€58.00
Prices incl. VAT, plus shipping costs
Part no. 1134837
Artikelbild Bearing shell conrod
BMW 2v Boxer models
Standard sized
€9.99 €12.50
Prices incl. VAT, plus shipping costs
Part no. 1124460
BMW R 80ST BMW R 80ST
€4,900.00
NEW
1101200_1 Big Bore Kit 1070cc "S"
BMW R 100 models from 9/80 on
Conrods 151,0 mm
€2,590.00
Prices incl. VAT, plus shipping costs
Part no. 1101200
NEW
3411612_1 Brake disc Mono Riveted
Right and left side
BMW Monolever with double disc
€169.00 €209.00
Prices incl. VAT, plus shipping costs
Part no. 3411612
NEW
3411197_1 Brake disc Paralever Left side
Floating
BMW R 80R and R 100R models
€169.00 €219.00
Prices incl. VAT, plus shipping costs
Part no. 3411197
NEW
3411068_1 Brake disc Mono Right side
Floating
BMW Monolever with double disc
€169.00 €219.00
Prices incl. VAT, plus shipping costs
Part no. 3411068
NEW
Artikelbild Starter Valeo 8 teeth
Overhauled In exchange
BMW R 50/5, R 60/5, R 75/5, R 60/6, R 75/6, R 90/6, R 90S

€239.00
Prices incl. VAT, plus shipping costs
Part no. 1241673
NEW
Artikelbild Bearing shell connecting rod
+0,50 2.Oversize
BMW 2V Boxer models
€9.99 €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
€9.99 €12.50
Prices incl. VAT, plus shipping costs
Part no. 1124419
SHZ2335_1 Alternator Three-phase
410W with PowerBlock
BMW 2-valve Boxer models
Digital single ignition 107mm centering
€1,049.00
Prices incl. VAT, plus shipping costs
Part no. SHZ2335
Artikelbild Wind deflector. Windshield
Painted black
BMW R 65GS, R 80G/S, R 80G/S PD, R 80GS, R 100GS, R 80GS Basic

€219.00
Prices incl. VAT, plus shipping costs
Part no. 4663902S
NEW
3421233_1 Brakemaster cylinder
Repair kit
BMW R 100 models
Rear
€44.95
Prices incl. VAT, plus shipping costs
Part no. 3421233
6211663_1 Instrument housing
White Rings
BMW R 60/6, R 75/6, R 90/6, R 90S
R 60/7, R 75/7, R 100 models
€111.00 €179.00
Prices incl. VAT, plus shipping costs
Part no. 6211663
1231107_1 Alternator
BMW 2v Boxer models from /7 on
350W
€459.00
Prices incl. VAT, plus shipping costs
Part no. 1231107
1231106_1 Alternator
BMWR 60/6, R 75/6, R 90/6, R 90S
350W
€459.00
Prices incl. VAT, plus shipping costs
Part no. 1231106
Artikelbild Brake line stainless steel
BMW R 65, R 80 Monolever
With low handlebar
€54.00
Prices incl. VAT, plus shipping costs
Part no. 3432181
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