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BMW Motorcycle Alternators

If it weren’t for your alternator, your motorcycle would be an oversized paperweight. After all, that's what produces the great part of the electricity your ride uses -- including the juice that starts it in the first place. However, motorcycle alternators are not like the ones found in cars and SUVs.

Put simply, an alternator produces power by generating alternate current (AC). This power is what charges and powers the electrical components while your motorcycle is running. A motorcycle alternator is often called a stator, which is a simpler type of alternator. It's accompanied by a regulator, or rectifier, and is usually considered part of the engine.

The stator is made of three parts: the rotor, stator, and field coil. The AC is generated when the rotor rotates around the stator as your bike runs. The stator has spokes around it, with copper coils encircling each spoke. When magnets on the rotor rotate around magnets on the stator, a current is produced. The regulator converts that AC power into direct current (DC) power that the battery can store, while also ensuring the correct amount of voltage is delivered.

How to Spot a Failing Alternator

Since the battery can't power the motorcycle on its own, you run the risk of getting stranded by the side of the road if your alternator fails. Signs include a misfiring engine, difficulty starting your motorcycle, dimming lights, and a poorly performing engine. If you experience any of these symptoms, you'll need to check your charging system to determine the source of the problem.

We're Your Best Source When Shopping for Genuine OEM Alternators Online

Your manufacturer makes the best alternators for your motorcycle, since they designed them specifically for your model. Our online parts store has everything you need for the project in stock and ready to ship, so buy now to get back on the road and riding safely!

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Suppression Capacitor Alternator
$28.12
Part Number: 12311356564
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Description: For vehicles with official vehicles.
Fits:
  • BMW-Motorrad:
    • K 100,
    • K 100 LT,
    • K 100 RS,
    • K 100 RT,
    • K 1100 LT,
    • K 75,
    • K 75 C,
    • K 75 RT,
    • K 75 S
Alternator
$1,260.30
Part Number: 12317704220
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • HP2 Sport
Alternator
$1,400.31
Part Number: 12318406639
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 1250 GS,
    • R 1250 GS Adventure,
    • R 1250 R,
    • R 1250 RS,
    • R 1250 RT
Alternator
$1,442.31
Part Number: 12318396695
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Description: Attention: rotor and stator absolutely must be replaced together!.
Fits:
  • BMW-Motorrad:
    • M 1000 R,
    • M 1000 RR,
    • S 1000 R,
    • S 1000 RR
Alternator
$1,190.27
Part Number: 12317722639
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • F 750 GS,
    • F 800 GS,
    • F 850 GS,
    • F 850 GS Adventure,
    • F 900 GS,
    • F 900 GS Adventure,
    • F 900 R,
    • F 900 XR
Alternator
Part Number: 12311244637
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12311243288
Fits:
  • BMW-Motorrad:
    • R 100 /T,
    • R 100 CS,
    • R 100 GS,
    • R 100 GS Paris-Dakar,
    • R 100 R,
    • R 100 RS,
    • R 100 RT,
    • R 65,
    • R 80,
    • R 80 G/S,
    • R 80 RT,
    • R 80 ST,
    • R65,
    • R65LS
Not For Sale
Set Alternator With Freewheel
$637.17
Part Number: 12311540516
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12318409384
Description: Important: comply with repair instructions!.
Fits:
  • BMW-Motorrad:
    • G 310 GS,
    • G 310 R
Alternator
Part Number: 12312305316
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12311459005, 12311459651
Fits:
  • BMW-Motorrad:
    • K 1,
    • K 100,
    • K 100 LT,
    • K 100 RS,
    • K 100 RT,
    • K 1100 LT,
    • K 75,
    • K 75 C,
    • K 75 RT,
    • K 75 S
Not For Sale
Alternator
$1,514.46
Part Number: 12318414440
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 18,
    • R 18 Classic,
    • R 18 Roctane
Set Alternator With Freewheel
$637.17
Part Number: 12311541463
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • G 310 GS,
    • G 310 R
Alternator
$1,260.30
Part Number: 12317676907
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 1200 GS Adventure,
    • R 1200 RT,
    • R 900 RT 05 SF
Alternator
Part Number: 12311357497
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12311358132
Not For Sale
Alternator
$1,190.27
Part Number: 12312305888
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • K 1200 GT,
    • K 1200 LT,
    • K 1200 RS
Alternator
Part Number: 12318559623
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Not For Sale
Alternator
$1,400.31
Part Number: 12318556028
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12318541003
Fits:
  • BMW-Motorrad:
    • R 1200 RT
Alternator
$1,260.30
Part Number: 12317712825
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 1200 GS,
    • R 1200 GS Adventure,
    • R nineT,
    • R nineT Pure,
    • R nineT Racer,
    • R nineT Scrambler,
    • R nineT Urban G/S
Rp Alternator
$1,392.60
Part Number: 12318524422
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12317690427
Fits:
  • BMW-Motorrad:
    • F 650 GS,
    • F 700 GS,
    • F 800 GS,
    • F 800 GS Adventure,
    • F 800 GT,
    • F 800 R,
    • F 800 S,
    • F 800 ST
Alternator
$1,228.76
Part Number: 12317699394
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • G 650 Xchallenge,
    • G 650 Xcountry,
    • G 650 Xmoto
Alternator
$1,260.30
Part Number: 12312306280
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • HP2 Enduro,
    • HP2 Megamoto,
    • R 1200 GS,
    • R 1200 R,
    • R 1200 S
Alternator
$1,442.31
Part Number: 12318404476
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Description: Attention: rotor and stator absolutely must be replaced together!.
Fits:
  • BMW-Motorrad:
    • S 1000 XR
Alternator With Pulley
$1,260.30
Part Number: 12317715081
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 1200 R,
    • R 1200 RT,
    • R 900 RT 10 SF
Alternator
$1,249.80
Part Number: 12312305000
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • K 1200 R,
    • K 1200 R Sport,
    • K 1200 S
Alternator - 165W
Part Number: 12317722463
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12317707150
Description: Part is no longer available. No alternative component available.
Fits:
  • BMW-Motorrad:
    • G 450 X
Not For Sale
Alternator
$1,120.29
Part Number: 12312306955
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 1150 RT,
    • R 1200 C,
    • R 1200 C Independent,
    • R 1200 C Montauk,
    • R 1200 CL
Alternator
$1,514.46
Part Number: 12318414445
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 18 B,
    • R 18 Transcontinental
Alternator
$1,315.26
Part Number: 12117687776
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12117652964
Fits:
  • BMW-Motorrad:
    • F 650 CS,
    • F 650 GS,
    • F 650 GS Dakar
Alternator
$1,400.31
Part Number: 12318356824
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Replaces: 12317724032, 12318526908
Fits:
  • BMW-Motorrad:
    • R 1200 GS,
    • R 1200 GS Adventure,
    • R 1200 R,
    • R 1200 RS
Alternator
$1,315.26
Part Number: 12317715476
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • G 650 GS,
    • G 650 GS Sertao
Alternator
$1,323.33
Part Number: 12317701566
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • K 1300 R,
    • K 1300 S,
    • K 1600 B,
    • K 1600 GT,
    • K 1600 GTL,
    • K 1600 GTL Exclusive
Alternator With Pulley
$1,120.29
Part Number: 12312306878
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Description: For vehicles with reinforced power supply [X509A (-)].
Fits:
  • BMW-Motorrad:
    • R 1100 S,
    • R 1150 GS
Alternator
$1,400.31
Part Number: 12318553990
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • S 1000 XR
Alternator
$1,249.80
Part Number: 12317676863
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • K 1200 GT,
    • K 1300 GT
Alternator
$1,260.30
Part Number: 12317679792
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • R 1200 ST
Alternator
$1,400.31
Part Number: 12317718420
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • HP4,
    • HP4Race,
    • S 1000 R,
    • S 1000 RR
Alternator
$1,120.29
Part Number: 12312306020
BMW-Motorrad BMW-Motorrad
Other Names: Alternator
Fits:
  • BMW-Motorrad:
    • K 1100 LT,
    • K 1100 RS,
    • K 75,
    • K 75 RT,
    • K 75 S,
    • R 1100 GS,
    • R 1100 R,
    • R 1100 RS,
    • R 1100 RT,
    • R 1100 S,
    • R 1150 GS,
    • R 1150 GS Adventure,
    • R 1150 R,
    • R 1150 R Roadster,
    • R 1150 RS,
    • R 1150 RT,
    • R 1200 C,
    • R 1200 C Independent,
    • R 850 R
Alternator Cover
$340.27
Part Number: 11148404145
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Description: Color mixture code U979 black satin-gloss 2.
Fits:
  • BMW-Motorrad:
    • S 1000 XR
Adapter Cable For Alternator
$43.84
Part Number: 61127691725
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cable
Fits:
  • BMW-Motorrad:
    • K 1300 S
Silver Alternator Support Cover
Part Number: 11111341893
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Replaces: 11111341253
Description: Check connection for engine ventilation! Seal without rotational ventilator!.
Fits:
  • BMW-Motorrad:
    • R 1100 GS,
    • R 1100 R,
    • R 1100 RS,
    • R 1100 RT,
    • R 1100 S,
    • R 1150 GS,
    • R 1150 GS Adventure,
    • R 1150 R,
    • R 1150 RS,
    • R 1200 C,
    • R 1200 C Independent,
    • R 1200 C Montauk,
    • R 1200 CL
Not For Sale
Set, Alternator Cover
$429.01
Part Number: 11149829369
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Description: Repair paint A45 matt black.
Fits:
  • BMW-Motorrad:
    • F 900 R,
    • F 900 XR
Front Cover/Alternator Support Cover
$437.58
Part Number: 11148409867
BMW-Motorrad BMW-Motorrad
Options: Front
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • R 18,
    • R 18 B,
    • R 18 Classic,
    • R 18 Roctane,
    • R 18 Transcontinental
Alternator Cover
$195.00
Part Number: 11148562760
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • G 310 GS,
    • G 310 R
Alternator Cover
$340.27
Part Number: 11149832013
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Description: Color mixture code M963 grantigrau-metallic matt.
Fits:
  • BMW-Motorrad:
    • M 1000 R,
    • M 1000 RR
Alternator Cover
$340.27
Part Number: 11148568812
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Description: Color mixture code wm3S copper metallic matte.
Fits:
  • BMW-Motorrad:
    • S 1000 R,
    • S 1000 RR
Alternator Cover
$48.92
Part Number: 11141464637
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Replaces: 11141460827
Fits:
  • BMW-Motorrad:
    • K 1,
    • K 100,
    • K 100 LT,
    • K 100 RS,
    • K 100 RT,
    • K 1100 LT,
    • K 1100 RS,
    • K 75,
    • K 75 C,
    • K 75 RT,
    • K 75 S
Alternator Rotor
$367.59
Part Number: 12311540515
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Rotor
Fits:
  • BMW-Motorrad:
    • G 310 GS,
    • G 310 R
Alternator Cover
$600.64
Part Number: 11147725738
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Description: Repair paint M957.
Fits:
  • BMW-Motorrad:
    • S 1000 XR
Black Alternator Support Cover
Part Number: 11111342293
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Replaces: 11111341891
Fits:
  • BMW-Motorrad:
    • R 1100 GS,
    • R 1100 R,
    • R 1100 RS,
    • R 1100 RT,
    • R 850 R
Not For Sale
Black Alternator Support Cover
$610.23
Part Number: 11111341895
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • R 1100 GS,
    • R 1100 R,
    • R 1100 RS,
    • R 1100 RT,
    • R 1100 S,
    • R 1150 GS,
    • R 1150 GS Adventure,
    • R 1150 R,
    • R 1150 R Roadster,
    • R 1150 RS,
    • R 1150 RT,
    • R 1200 C
Set, Alternator Cover
$429.01
Part Number: 11148406702
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Description: Repair paint M960 aluminiumsilber-metallic.
Fits:
  • BMW-Motorrad:
    • F 750 GS,
    • F 850 GS,
    • F 850 GS Adventure
Pulley Alternator
Part Number: 12311342075
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Pulley
Replaces: 12311340934
Fits:
  • BMW-Motorrad:
    • R 1100 GS,
    • R 1100 R,
    • R 1100 RS,
    • R 1100 RT,
    • R 1100 S,
    • R 1150 GS,
    • R 1150 GS Adventure,
    • R 1150 R,
    • R 1150 R Roadster,
    • R 1150 RS,
    • R 1150 RT,
    • R 1200 C,
    • R 1200 C Independent,
    • R 1200 C Montauk,
    • R 1200 CL,
    • R 850 R
Not For Sale
Cover, Alternator
$466.08
Part Number: 11147726966
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Replaces: 11147713742
Description: Repair paint M957.
Fits:
  • BMW-Motorrad:
    • HP4,
    • HP4Race,
    • S 1000 R,
    • S 1000 RR
Alternator Cover
$348.45
Part Number: 11145A010F9
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • C 400 GT,
    • C 400 X
Alternator Cover
$348.45
Part Number: 11148552207
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • C 400 GT,
    • C 400 X
Silver Alternator Support Cover
Part Number: 11111342292
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Replaces: 11111341890, 11111341917
Fits:
  • BMW-Motorrad:
    • R 1100 GS,
    • R 1100 R,
    • R 1100 RS,
    • R 850 R
Not For Sale
Fan Wheel
Part Number: 12311459036
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Fan
Fits:
  • BMW-Motorrad:
    • K 1,
    • K 100,
    • K 100 LT,
    • K 100 RS,
    • K 100 RT,
    • K 1100 LT,
    • K 75,
    • K 75 C,
    • K 75 RT,
    • K 75 S
Not For Sale
Alternator Cover
$195.00
Part Number: 11149457853
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • G 310 GS,
    • G 310 R
Stator Assembly
Part Number: 12311459288
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Stator
Fits:
  • BMW-Motorrad:
    • K 1,
    • K 100,
    • K 100 LT,
    • K 100 RS,
    • K 100 RT,
    • K 1100 LT,
    • K 75,
    • K 75 C,
    • K 75 RT,
    • K 75 S
Not For Sale
Alternator Rotor
$367.59
Part Number: 12311541462
BMW-Motorrad BMW-Motorrad
Other Names: Alternator Cover
Fits:
  • BMW-Motorrad:
    • G 310 GS,
    • G 310 R
Alternator
$1,442.31
Part Number: 12311603399
BMW-Motorrad BMW-Motorrad
Fits:
  • BMW-Motorrad:
    • R 1300 GS
Gasket Set For Alternator Cover
$38.58
Part Number: 11117715425
BMW-Motorrad BMW-Motorrad
Other Names: Gasket Set For Alternator
Fits:
  • BMW-Motorrad:
    • G 450 X
Alternator Stator
$308.07
Part Number: 12318552337
BMW-Motorrad BMW-Motorrad
Fits:
  • BMW-Motorrad:
    • C 400 GT,
    • C 400 X
Alternator Cover
$174.80
Part Number: 11147706932
BMW-Motorrad BMW-Motorrad
Fits:
  • BMW-Motorrad:
    • G 450 X
Alternator Rotor
$577.66
Part Number: 11268552321
BMW-Motorrad BMW-Motorrad
Fits:
  • BMW-Motorrad:
    • C 400 GT,
    • C 400 X
Set Alternator
Part Number: 12318558421
BMW-Motorrad BMW-Motorrad
Replaces: 12317729666, 12318534666
Fits:
  • BMW-Motorrad:
    • C 600 Sport,
    • C 650 GT,
    • C 650 Sport
Not For Sale
Alternator Cover - Black
$340.27
Part Number: 11147108058
BMW-Motorrad BMW-Motorrad
Description: Color mixture code U979 black.
Fits:
  • BMW-Motorrad:
    • S 1000 RR
Set Alternator With Freew
$511.87
Part Number: 12319898041
BMW-Motorrad BMW-Motorrad
Repair Kit For Alternator
$49.01
Part Number: 12417723442
BMW-Motorrad BMW-Motorrad
Set, Alternator Cover - Avus Black
$487.53
Part Number: 11145B3AB07
BMW-Motorrad BMW-Motorrad
Fits:
  • BMW-Motorrad:
    • F 800 GS,
    • F 900 GS,
    • F 900 GS Adventure,
    • F 900 R,
    • F 900 XR

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