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Chains and Sprockets

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Chain kit Chain rear sprocket
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AFAM Moose Racing Moto Master Renthal Standard Parts
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AFAM
Rear Sprocket AFAM 51 teeth - 420 Beta RR / Caballero
Article no.: CGN495148

Rear Sprocket AFAM 51 teeth - 420 Beta RR / Caballero

23,00 €
In stock
28,00 €
-18% Discount
Sale
AFAM
Chain Kit Aprilia RX 50 1999 - 2001 Afam 12x51 - 420 (OEM ratio)
Article no.: AFAM32036

Chain Kit Aprilia RX 50 1999 - 2001 Afam 12x51 - 420 (OEM ratio)

60,00 €
In stock
AFAM
Chain Kit Aprilia MX / SM 50 2003 - 2005 Afam 11x51 - 420 (OEM ratio)
Article no.: AFAM32035

Chain Kit Aprilia MX / SM 50 2003 - 2005 Afam 11x51 - 420 (OEM ratio)

59,50 €
In stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T black KTM / Husqvarna
Article no.: MMAST-12112241

Rear Sprocket Moto Master 520 Fusion 51T black KTM / Husqvarna

51,00 €
In stock
RRP
80,00 €
-36% Discount
Sale
Moto Master
Rear Sprocket Moto Master 420 aluminium 51 teeth black KX 85
Article no.: MMAST-12112188

Rear Sprocket Moto Master 420 aluminium 51 teeth black KX 85

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 51T KX /KXF
Article no.: MMAST-12102251

Rear Sprocket Moto Master 520 steel 51T KX /KXF

31,00 €
In stock
RRP
49,00 €
-37% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 steel 51T RM / RM-Z
Article no.: MMAST-12102229

Rear Sprocket Moto Master 520 steel 51T RM / RM-Z

34,00 €
In stock
RRP
49,00 €
-31% Discount
Sale
AFAM
Chain Kit Afam 520 MR2 YZ 125 13/51 ultra-light rear sprocket
Article no.: 48011608

Chain Kit Afam 520 MR2 YZ 125 13/51 ultra-light rear sprocket

45,50 €
In stock
RRP
106,00 €
-57% Discount
AFAM
Chain Kit Afam 428 MX 85 KX 13/51 ultra-light rear sprocket
Article no.: 48011186

Chain Kit Afam 428 MX 85 KX 13/51 ultra-light rear sprocket

101,00 €
In stock
AFAM
Chain Kit Afam 520 MR2 CR 125 13/51 1990-1997
Article no.: 48010865

Chain Kit Afam 520 MR2 CR 125 13/51 1990-1997

109,00 €
In stock
AFAM
Chain Kit AFAM 11x51 Beta RR
Article no.: AFAMKS-A-114

Chain Kit AFAM 11x51 Beta RR

47,00 €
In stock soon
AFAM
Rear Sprocket steel 51T - 420 AFAM Beta RR
Article no.: AFAM38101-51

Rear Sprocket steel 51T - 420 AFAM Beta RR

21,50 €
In stock soon
Standard Parts
Rear Sprocket 51 teeth - 420 d. 100mm red Beta RR
Article no.: SP-37396/RE

Rear Sprocket 51 teeth - 420 d. 100mm red Beta RR

27,00 €
Currently not in stock
AFAM
Rear Sprocket 51 teeth - 420 Afam Generic Trigger
Article no.: AFAM35103-51

Rear Sprocket 51 teeth - 420 Afam Generic Trigger

25,00 €
Currently not in stock
AFAM
Chain Kit Aprilia RX 50 1995 - 1998 Afam 12x51 - 420 (OEM ratio)
Article no.: AFAM31762

Chain Kit Aprilia RX 50 1995 - 1998 Afam 12x51 - 420 (OEM ratio)

57,50 €
Currently not in stock
AFAM
Chain Kit Aprilia RX 2002 - 2006 Afam 11x51 - 420 OEM ratio
Article no.: AFAM31760

Chain Kit Aprilia RX 2002 - 2006 Afam 11x51 - 420 OEM ratio

56,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T blue YZ / YZF
Article no.: MMAST-12112312

Rear Sprocket Moto Master 520 alu 51T blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T blue TM Racing MX / EN
Article no.: MMAST-12112458

Rear Sprocket Moto Master 520 alu 51T blue TM Racing MX / EN

48,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 alu 51T black TC / SX 65
Article no.: MMAST-12112377

Rear Sprocket Moto Master 420 alu 51T black TC / SX 65

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T blue Sherco / Beta
Article no.: MMAST-12112362

Rear Sprocket Moto Master 520 Fusion 51T blue Sherco / Beta

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T red Sherco / Beta
Article no.: MMAST-12112357

Rear Sprocket Moto Master 520 Fusion 51T red Sherco / Beta

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T black Sherco / Beta
Article no.: MMAST-12112352

Rear Sprocket Moto Master 520 Fusion 51T black Sherco / Beta

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T blue Sherco / Beta
Article no.: MMAST-12112347

Rear Sprocket Moto Master 520 alu 51T blue Sherco / Beta

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T black Sherco / Beta
Article no.: MMAST-12112331

Rear Sprocket Moto Master 520 alu 51T black Sherco / Beta

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T blue YZ / YZF
Article no.: MMAST-12112323

Rear Sprocket Moto Master 520 Fusion 51T blue YZ / YZF

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T black YZ / YZF
Article no.: MMAST-12112318

Rear Sprocket Moto Master 520 Fusion 51T black YZ / YZF

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T black YZ / YZF
Article no.: MMAST-12112299

Rear Sprocket Moto Master 520 alu 51T black YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 alu 51T orange TC / SX 85
Article no.: MMAST-12112273

Rear Sprocket Moto Master 428 alu 51T orange TC / SX 85

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 alu 51T blue TC / SX 85
Article no.: MMAST-12112266

Rear Sprocket Moto Master 428 alu 51T blue TC / SX 85

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 alu 51T black TC / SX 85
Article no.: MMAST-12112259

Rear Sprocket Moto Master 428 alu 51T black TC / SX 85

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T orange KTM / Husqvarna
Article no.: MMAST-12112251

Rear Sprocket Moto Master 520 Fusion 51T orange KTM / Husqvarna

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T blue KTM / Husqvarna
Article no.: MMAST-12112246

Rear Sprocket Moto Master 520 Fusion 51T blue KTM / Husqvarna

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T orange KTM / Husqvarna
Article no.: MMAST-12112234

Rear Sprocket Moto Master 520 alu 51T orange KTM / Husqvarna

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T blue KTM / Husqvarna
Article no.: MMAST-12112219

Rear Sprocket Moto Master 520 alu 51T blue KTM / Husqvarna

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T black KTM / Husqvarna
Article no.: MMAST-12112204

Rear Sprocket Moto Master 520 alu 51T black KTM / Husqvarna

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T black KXF 250 / 450
Article no.: MMAST-12112183

Rear Sprocket Moto Master 520 Fusion 51T black KXF 250 / 450

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T black KXF 250 / 450
Article no.: MMAST-12112177

Rear Sprocket Moto Master 520 alu 51T black KXF 250 / 450

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 alu 51T blue RM 85 / YZ 85
Article no.: MMAST-12112152

Rear Sprocket Moto Master 428 alu 51T blue RM 85 / YZ 85

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 alu 51T black RM 85 / YZ 85
Article no.: MMAST-12112130

Rear Sprocket Moto Master 428 alu 51T black RM 85 / YZ 85

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T red CR / CRF
Article no.: MMAST-12112111

Rear Sprocket Moto Master 520 Fusion 51T red CR / CRF

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 51T black CR / CRF
Article no.: MMAST-12112106

Rear Sprocket Moto Master 520 Fusion 51T black CR / CRF

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T red CR / CRF
Article no.: MMAST-12112101

Rear Sprocket Moto Master 520 alu 51T red CR / CRF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T black CR / CRF
Article no.: MMAST-12112094

Rear Sprocket Moto Master 520 alu 51T black CR / CRF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 alu 51T black RM 125 / 250
Article no.: MMAST-12112069

Rear Sprocket Moto Master 520 alu 51T black RM 125 / 250

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 51T CR / CRF
Article no.: MMAST-12102312

Rear Sprocket Moto Master 520 steel 51T CR / CRF

40,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 51T YZ / YZF
Article no.: MMAST-12102270

Rear Sprocket Moto Master 520 steel 51T YZ / YZF

45,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 steel 51T TC /SX 85
Article no.: MMAST-12102259

Rear Sprocket Moto Master 428 steel 51T TC /SX 85

45,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 steel 51T RM / YZ 85
Article no.: MMAST-12102237

Rear Sprocket Moto Master 428 steel 51T RM / YZ 85

45,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 MR2 RM 125 13/51 ultra-light rear sprocket
Article no.: 48011442

Chain Kit Afam 520 MR2 RM 125 13/51 ultra-light rear sprocket

108,00 €
Currently not in stock
AFAM
Chain Kit Afam 420 MX2 KX 85 14/51 Rear Sprocket self-cleaning
Article no.: 48011174

Chain Kit Afam 420 MX2 KX 85 14/51 Rear Sprocket self-cleaning

92,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 MR2 CR 125 13/51 original 1998-1999
Article no.: 48010396

Chain Kit Afam 520 MR2 CR 125 13/51 original 1998-1999

129,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 MR2 CR 125 13/51 original 2002
Article no.: 48010387

Chain Kit Afam 520 MR2 CR 125 13/51 original 2002

129,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 MR2 RM 125 12 / 51
Article no.: 48010214

Chain Kit Afam 520 MR2 RM 125 12 / 51

129,00 €
Currently not in stock
AFAM
Rear Sprocket Afam steel self-cleaning 51 teeth Kawasaki KX / KXF
Article no.: 1074558004

Rear Sprocket Afam steel self-cleaning 51 teeth Kawasaki KX / KXF

51,00 €
Currently not in stock
AFAM
Rear Sprocket Afam steel self-cleaning 51 teeth Honda CR / CRF / XR
Article no.: 1074330004

Rear Sprocket Afam steel self-cleaning 51 teeth Honda CR / CRF / XR

51,00 €
Currently not in stock
AFAM
Rear Sprocket Afam steel self-cleaning 51 teeth KTM / Husqvarna
Article no.: 1074718004

Rear Sprocket Afam steel self-cleaning 51 teeth KTM / Husqvarna

51,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 51 teeth GasGas / Husqvarna
Article no.: 1074539002

Rear Sprocket Afam aluminium 51 teeth GasGas / Husqvarna

46,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 428 / 51 teeth TC / SX 85
Article no.: 1074726006

Rear Sprocket Afam aluminium 428 / 51 teeth TC / SX 85

50,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 51 teeth Honda CR / CRF / XR
Article no.: 1074389010

Rear Sprocket Afam aluminium self-cleaning 51 teeth Honda CR / CRF / XR

55,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 51 teeth Yamaha YZ / YZF
Article no.: 1074470006

Rear Sprocket Afam aluminium self-cleaning 51 teeth Yamaha YZ / YZF

55,50 €
Currently not in stock
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12

Chain kit: chain, front sprocket, rear sprocket

Chain kit - components and function

Most motorcycles and mopeds use a front sprocket, rear sprocket (also called a chainring), and chain to transfer engine power to the rear wheel. These three parts together are referred to as a chain kit, and it is usually recommended to replace all components at the same time.

On a motorcycle or motocross bike, the front sprocket sits on the gearbox output shaft. On a moped, it is connected to the rear pulley (which in turn is driven by the V-belt).
This front sprocket drives the chain, which acts as the link between the engine and the rear wheel by turning the rear sprocket.
The rear sprocket is mounted to the rear wheel hub and ultimately turns the wheel so the bike moves forward.

There are different chain types that vary in size and length as well as intended use. There are basic chains or reinforced versions. Others are equipped with sealing rings (O-ring, X-ring, or U-ring), which makes them quieter and longer-lasting. For off-road use, there are special versions with specific surface finishes to withstand the demands of riding on rough terrain.

Front sprockets and rear sprockets are available in steel or aluminum (lighter, but less durable). For off-road use, self-cleaning versions are also available, with special cutouts between the teeth that help carry dirt away.

Choosing the right gearing

Each element of the chain kit should be selected carefully. Depending on engine output and intended use, different criteria can become important (see the previous chapter on off-road use).

Chain pitch is a key criterion: the more powerful the engine and the higher the torque, the larger the pitch.

An example: A classic moped uses a chain with a 415 pitch. An 85cc motocross bike, on the other hand, uses a 428 pitch, which is better suited to its output. A 1000cc sport bike uses a 530 pitch.

Choosing the right gearing has a direct impact on top speed and how responsive the bike feels. But caution: a weak engine cannot be run with gear ratio that is too tall. Except with very extensive engine tuning, it is best not to deviate too far from the manufacturer recommendations. It is also worth keeping in mind that with a larger change, a longer or shorter chain may be required (chain adjusters have their limits).

An example: The engine has been tuned with a higher-displacement cylinder. There is now significantly more torque and the goal is a bit more top-end speed. This can be done by fitting a larger front sprocket or a smaller rear sprocket. If a more direct response when exiting corners is preferred, a larger rear sprocket or a smaller front sprocket is used.

WARNING! One tooth more or less on the front sprocket has a much bigger effect than on the rear sprocket. It is generally said that one tooth on the front sprocket is roughly equivalent to three teeth on the rear sprocket.

Maintenance tips

Chain maintenance is very easy, but it needs to be done very regularly. Brushes and special products are available to clean the chain carefully and then grease it. The more thorough the work, the longer the chain kit lasts.

It should be noted that a new chain stretches a bit more during initial use than it does afterward. Chain tension should therefore be checked after the first ride and then regularly, to avoid the chain coming off or damage to the swingarm or other components (such as the shift lever on some models).

For off-road riders (motocross, enduro), chain care should be done after every ride, using a special off-road chain grease.

It should also be noted that some parts are in direct contact with the chain and their condition also needs to be monitored: the chain guide must a) be present and b) be in good condition so the chain does not come off. The swingarm slider protects the swingarm from friction caused by the chain.

Chain, front sprocket, and rear sprocket in our shop

In our online shop, complete chain kits are available for motorcycles, motocross bikes, and mopeds with chain drive, as well as all individual parts, to offer a very large selection.

Products in OEM quality are available, as well as reinforced versions from well-known brands such as AFAM, Iris, Moto Master, Prox, MotoForce, Stage6 or Voca Racing, Doppler, etc.

We try to always stock items for the most popular models on the market at the best prices and with short delivery times. Owners of Derbi Senda, Rieju MRT, Beta RR, Sherco SM/SE, Yamaha YZ / DT, KTM EXC / SX, Honda CRF ... etc. will find what they need.

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