Cookies allow us to measure our audience, ensure that our advertising services work properly, maintain our relationship with you and provide you the best possible experience. Click on "Learn more" for more information.

Learn more List of our partners

Our winter offer I BUY

Live the Enduropale to the full with Motoblouz

To return your product -> Click here

Item 1 of 3

30 days returns

Help and contacts

Motorbike

Basket

Motorbike helmets
Full-face helmets
Modular helmets
Jet helmets
Motorcross helmets
Kids helmets
Men's Motorcycle Gear
Motorbike Jackets Leather Motorbike Jackets Textile Motorbike Jackets Summer jackets Airbags Back protectors and other protective gear
Motorbike gloves Summer Motorbike Gloves Mid-season motorbike gloves Winter Motorbike Gloves Heated Motorbike Gloves Gore-Tex gloves
Motorbike pants Jeans Textile pants Leather Pants Waterproof pants Protectors/Sliders/Knee pads
Men's Motorcycle Boots and Shoes Motorbike Boots and Anckle Boots Motorcycle Sneakers and Shoes Waterproof boots, sneakers and shoes
Cold and Rain All heated products Neckwarmers/Balaclavas/Masks Technical and thermal underwear Inner-gloves/Over-gloves/Over-boots Rain Suit Rain jackets/pants
Race suits
Men's Equipment Packs
Women's motorbike gear
Women's Motorbike Jackets Leather jackets and vests Textile jackets and vests Waterproof jackets and vests Back protector and other protective gear Airbags
Women's Motorbike Gloves Summer Motorbike Gloves Mid-season Motorbike Gloves Winter Motorbike Gloves Heated Motorcbike Gloves Waterproof Motorbike Gloves
Women's Motorbike pants Women's Motorbike Jeans Textile pants Leather Pants Waterproof pants Protectors/Sliders/Knee pads
Women's Motorbike Boots and Shoes Sneakers and Shoes Boots and ankle-boots Waterproof boots and sneakers
Cold and rain Rain jackets and pants Neck warmers/balaclavas Inner gloves/Over gloves/Over boots Rain Suits Technical and thermal underwear
Race suits
Mx, Enduro and Trials
Motocross Motocross Helmets Motocross outfits Motocross Jerseys Motocross pants Motocross gloves Motocross boots Spare parts Boots Spare Parts Helmets
Enduro Enduro helmets Enduro jackets Enduro jerseys Enduro pants Enduro gloves Enduro boots Spare Parts Boots Enduro luggage
Kids Kids motocross helmets Masks Screens and Accessories Kids motocross outfits Jerseys Pants Gloves Boots Protections Chest protectors and vests Knee and elbow pads
Mx/Enduro Masks Masks Screens and Accessories
Mx/Enduro Protectors Chest protector/Protection vest Neck Protection Orthotics/ Knee pads/Elbow pads Technical Protection
Technical accessories Technical underwear Rainwear Hydration systems/camel backs Socks and leg warmers
Trial Trial Helmets Trial Jerseys Trial Pants Trial Boots
Mx/Enduro Prov equipment
Motorbike Tech
Intercoms and hands-free kits Communication Systems Intercom Accessories and Spare Parts
Smartphone accessories Phone cases Phone holders Adapters and Chargers
GPS and GPS trackers GPS and Tracker GPS holders
Motorbike Airbags
Airbags
Airbag Accessories and Refills
Motorbike luggages
Top cases and motorbike suitcases
Saddlebagsand pillion bags
Tank Bags
Mounting brackets & installation kits
Tank pads for luggage
Back rests & sissy bars
Backpacks and leg bags
Transport bags
Luggage Packs
Motorbike parts and tools
Oil & maintenance spray Engine oils Liquids & lubricants Maintenance sprays & liquids
Motorbike filters Oil filters Air filters Air horns Filter accessories
Motorbike exhausts Motorbike mufflers & silencers Motorbike manifolds Complete exhaust systems Motorbike exhaust accessories
Motorbike braking Motorbike brake pads Motorcycle discs Lever, master cylinders & pedals Brake hoses Repair kits
Batteries & electrical parts Motorbike batteries and chargers Turn signal relays Starters Stator Neiman - Ignition switches Other electrical parts
Transmissions Motorbike chain kits Motorbike chains Motorcycle sprockets Motorbike sprockets Scooter transmissions
Engine parts & cables Motorbike spark plug Clutch Carburation and injection Seal Cable Reed valve Upper engine Lower engine Cooling system
Wheels & inner tubes Inner tubes, foam & accessories Wheels & rims Wheel bearings
Shock absorber & suspension Shock absorber Fork oil seals Bearings Friction ring Lowering kit Reconditioning kit Starter hook
Tools and maintenance Motorbike maintenance products Battery chargers Workshop stands Motorbike covers Tools
Motorcycle Maintenance Packs
Motorbike accessories
Locks & alarms
Motorbike customization Commodo & horns Speedometers & Indicators Handlebars & accessories Fork tees & handlebar clamps Handles & heated handles Gas cylinders Levers, clutch covers, master cylinders Footrests, selectors & pedals Rearview mirrors Motorbike kickstands Stickers & rim nets License plate holders Decoration kits Tanks & caps Insurance holders
Motorbike clothing & protective gear Winshields, windscreens & windjumps Plastic kits Radiator scoops and protectors Seat covers Bodywork & Fairings Mudguards Wheel arches Tank protectors Protectors & covers Motorbike shoes Crash bars & sliders Aprons & handle bar muffs
Lighting and signage Bulbs Turn signals and lights Indicator centrals/relay & resistors
Motorbike seats Comfort seat (or stock type)Universal seats Saddle covers
Tech GPS GPS accessories
Sportswear
Caps/beanies/neck warmers
T-shirts/Shirts/Polo shirts/Sweatshirts
Jackets and down jackets
Transport bags and backpacks
Gift ideas
MotoGp Replicas
Motocross Sportswear
Deals and Promotions
Helmets and Accessories
Men's Motorbike Equipment
Women's motorbike equipment
Motorcross/Enduro/Trials
Motorcycle parts and accessories
Gift cards
Brands
Contact us

Our winter offer I BUY

Live the Enduropale to the full with Motoblouz

To return your product -> Click here

Item 1 of 3

Homepage

Motorbike parts and tools

Transmissions

Chain kit EK CHAIN PBR 520MRD7 12/50 - Standard Rear Sprocket

WINTER OFFER

EK CHAIN PBR 520MRD7 12/50 - Standard Rear Sprocket Chain kit

Non-contractual photo

WINTER OFFER

EK CHAIN PBR 520MRD7 12/50 - Standard Rear Sprocket Chain kitGAS-GAS 125 EC 125 RACING - 2013 - 2015Ref : EKC04298A / 3069407

Name: PBR 520MRD7 12/50 - Standard Rear Sprocket
Brand: EK CHAIN
Price: 107.37 EUR
Availability: InStock

Recommended retail price:140,38 €?

107,37 ^€

Earn 108 points with My Motoblouz

Check compatibility

Add to basket 107,37 €

Payment in instalments available!

Try first, pay in 15 days

30 days returns

Description
Compatible motorbikes
Questions and answers

DescriptionEK CHAIN PBR 520MRD7 12/50 - Standard Rear Sprocket Chain kit

Product details :

Features

EK/PBR 520MRD7 12/50 Chain Kit - Standard Sprocket
Specifically designed for off-road practices, this EK CHAIN kit includes a 520 chain and a sprocket/crown pair in a standard 12/50 configuration. Designed for motocross bikes, it offers a complete solution to restore the transmission after a season on hard or muddy terrain.

Model Reference: 520MRD7
Configuration: 12-tooth sprocket / 50-tooth crown (standard)
Number of Links: 114
Pitch: 520
Color: gold / gold
Crown Material: steel
Weight: 1.47 kg for 100 links
Relative Lifespan: 450 (for 100 links, manufacturer data)

This kit is aimed at motocross riders looking for a transmission ready to withstand terrain stresses while facilitating maintenance and adjustments. The steel crown provides strength and wear resistance, and the 520MRD7 chain offers compatibility suitable for cross models, particularly on GAS GAS EC 125 RACING (2013–2015). Installation, tension adjustment, and regular lubrication remain essential to get the best performance from this kit.

Technical information :

Reference

EKC04298A / 3069407

Complete chain weight

1,67 kg

Quality

Racing

Weight (kg/100 links)

1,47 kg

Relative wear life (per 100 links)

450

Tensile Strength (lbs)

8900

Tensile Strength (kN)

39.7

Chain pitch

520

Chain color

Gold/Gold

Rear Sprocket Material

Steel

Front sprocket version

Standard

EK Chain Type

MRD7

Ring type

No seal

Length (links)

114

Use

All-terrain

Compatible motorbikes

GAS-GAS1 compatible model

EC 125 RACING - 2013/2015

Questions and answers

Homepage

Motorbike parts and tools

Transmissions

Chain kit EK CHAIN PBR 520MRD7 12/50 - Standard Rear Sprocket

30 days returns

Payment 100% secure

Our frequently asked questions

Our experts are at your service

Monday to Friday from 9.00 am to 6.30 pm and Saturday from 9.00 am to 12.30 pm and from 1.30 pm to 5.00 pm

Our telephone service will be exceptionally closed on Friday, February 6, 2026 from 2customer-service.yellow-banner.top.hour00 PM to 2customer-service.yellow-banner.top.hour30 PM.

They're talking about us

Trustpilot

See all reviews