EK CHAINS 520 HEAVY DUTY 120L HIGH PERFORMANCE RACE CHAIN
The MRD7 Series is EK Chains 7th generation motocross specific racing chain. Featuring a revised pin design and CRH chromium carbide coating for maximum wear reduction and performance. A total weight reduction of 3% has been achieved through lightening holes on the inner plates. This also aids in service life as heat is dissipated more quickly and dirt builds up less.
All EK Chains motocross chains utilise our CRH pin treatment which provides an extremely hard outside coating and softer inside to increase strength and reduce chain wear. Exclusive to EK Chains, the Chromium Carbide pin surface coating also offers superior impact and shock absorption while reducing oxidation caused by natural elements.
The MRD7 chain is EK Chains motocross race chain. Highly advanced technology and proven durability make this chain a market leader in Motocross around the world. Used by many riders and factory race teams, the EK Chains MRD7 range is the only choice for Australiaās KTM Factory Racing Team.
The 520MRD7 also features lightening holes in the side plates to reduce the chain's overall weight by 3% without compromising tensile strength. These holes also extend the service life of the chain by dissipating heat and helping reduce dirt and mud build up.
CHAIN SPECIFICATIONS
Pin Length (mm): 17.50
Pin Diameter (mm): 5.24
Roller Diameter (mm): 10.16
Inner Plate Thickness (mm): 2.0
Outer Plate Thickness (mm): 2.0
Tensile LBS/FT: 8,900
Wear Life Index (Standard as 100): 400
Weight 100 Links (kg): 1.52
Seal Type: N/A
Max CC Street: 250cc
Max CC Off-Road: 500cc (4T)
Standard Connecting Link: SPJ
Optional Connecting Link: MLJ
KEY FEATURES OF EK CHAINS
1. ANALYTIC TECHNOLOGY
- State-of-the-art advanced computer technology enables EK to reduce the overall weight by 3% without compromising tensile strength, which in turn extends the life of the chain
- Industry leading machining process of all metal surfaces helps create an unmatched and optimal seal of all EK O-Ring and X-Ring chains
- Additionally mud and dirt build-up is significantly reduced via this technology
2. HEAT TREATMENT
- All EK off-road race chains utilise EKās exclusive CRH pin treatment process, which provides an extremely hard outside coating and softer inside to increase strength and reduce wear
- Superior impact and shock absorption, and reduced oxidation is also a result of EKās Chromium Carbide pin surface coating
3. MATERIAL ANALYSIS
4. SEAL-RING TECHNIQUE
O-Ring - EK O-Ring chain has excellent performance at a great price. EK Chain was at the forefront of Sealed chain development and manufacture in the early 70ās, first used as genuine chain on the Kawasaki Z1. Oāring used for SRO Series.
QX-Ring - QX-Ring is a Slim Profile chain with 40% less friction than a normal O-ring chain and 150% better endurance. Used for SRX2 series, 420SRX and 428ZVX.
NX-Ring - NX-Ring is 15% more durable than QX-Ring. The NX-Ring chain has improved tensile strength & increased weight saving. Used for ZVX3 Series.
SX-Ring - SX-Ring is EKās slimmest profile X-Ring. High tensile strength and increased durability. Used for 520 RXO/SM Series.
5. JOINING LINKS
RIVET TYPE - MLJ
- EKās most dependable connecting link
- More commonly used on street applications
- Requires special riveting tool to install
CLIP TYPE - SPJ Slip Fit
- Easy to install, can be installed with standard pliers
- Comes standard with some non-sealed chains
CLIP TYPE - SKJ Semi-Press Fit
- Easy to install, can be installed with standard pliers
- Re-designed link plate requires additional pressure to push onto the connecting pins but offers increased dependability and a tighter fit
- Comes standard with motocross, off-road and drag racing chains
SCREW TYPE - SLJĀ
- Dependable alternative and easy to install
- Patented mechanism allows easy installation with wrench and pliers
-Available only as option for selected sealed chains
Product Information
Product Information
Shipping & Returns
Shipping & Returns
EK CHAINS 520 HEAVY DUTY 120L HIGH PERFORMANCE RACE CHAIN
EK CHAINS 520 HEAVY DUTY 120L HIGH PERFORMANCE RACE CHAIN
The MRD7 Series is EK Chains 7th generation motocross specific racing chain. Featuring a revised pin design and CRH chromium carbide coating for maximum wear reduction and performance. A total weight reduction of 3% has been achieved through lightening holes on the inner plates. This also aids in service life as heat is dissipated more quickly and dirt builds up less.
All EK Chains motocross chains utilise our CRH pin treatment which provides an extremely hard outside coating and softer inside to increase strength and reduce chain wear. Exclusive to EK Chains, the Chromium Carbide pin surface coating also offers superior impact and shock absorption while reducing oxidation caused by natural elements.
The MRD7 chain is EK Chains motocross race chain. Highly advanced technology and proven durability make this chain a market leader in Motocross around the world. Used by many riders and factory race teams, the EK Chains MRD7 range is the only choice for Australiaās KTM Factory Racing Team.
The 520MRD7 also features lightening holes in the side plates to reduce the chain's overall weight by 3% without compromising tensile strength. These holes also extend the service life of the chain by dissipating heat and helping reduce dirt and mud build up.
CHAIN SPECIFICATIONS
Pin Length (mm): 17.50
Pin Diameter (mm): 5.24
Roller Diameter (mm): 10.16
Inner Plate Thickness (mm): 2.0
Outer Plate Thickness (mm): 2.0
Tensile LBS/FT: 8,900
Wear Life Index (Standard as 100): 400
Weight 100 Links (kg): 1.52
Seal Type: N/A
Max CC Street: 250cc
Max CC Off-Road: 500cc (4T)
Standard Connecting Link: SPJ
Optional Connecting Link: MLJ
KEY FEATURES OF EK CHAINS
1. ANALYTIC TECHNOLOGY
- State-of-the-art advanced computer technology enables EK to reduce the overall weight by 3% without compromising tensile strength, which in turn extends the life of the chain
- Industry leading machining process of all metal surfaces helps create an unmatched and optimal seal of all EK O-Ring and X-Ring chains
- Additionally mud and dirt build-up is significantly reduced via this technology
2. HEAT TREATMENT
- All EK off-road race chains utilise EKās exclusive CRH pin treatment process, which provides an extremely hard outside coating and softer inside to increase strength and reduce wear
- Superior impact and shock absorption, and reduced oxidation is also a result of EKās Chromium Carbide pin surface coating
3. MATERIAL ANALYSIS
4. SEAL-RING TECHNIQUE
O-Ring - EK O-Ring chain has excellent performance at a great price. EK Chain was at the forefront of Sealed chain development and manufacture in the early 70ās, first used as genuine chain on the Kawasaki Z1. Oāring used for SRO Series.
QX-Ring - QX-Ring is a Slim Profile chain with 40% less friction than a normal O-ring chain and 150% better endurance. Used for SRX2 series, 420SRX and 428ZVX.
NX-Ring - NX-Ring is 15% more durable than QX-Ring. The NX-Ring chain has improved tensile strength & increased weight saving. Used for ZVX3 Series.
SX-Ring - SX-Ring is EKās slimmest profile X-Ring. High tensile strength and increased durability. Used for 520 RXO/SM Series.
5. JOINING LINKS
RIVET TYPE - MLJ
- EKās most dependable connecting link
- More commonly used on street applications
- Requires special riveting tool to install
CLIP TYPE - SPJ Slip Fit
- Easy to install, can be installed with standard pliers
- Comes standard with some non-sealed chains
CLIP TYPE - SKJ Semi-Press Fit
- Easy to install, can be installed with standard pliers
- Re-designed link plate requires additional pressure to push onto the connecting pins but offers increased dependability and a tighter fit
- Comes standard with motocross, off-road and drag racing chains
SCREW TYPE - SLJĀ
- Dependable alternative and easy to install
- Patented mechanism allows easy installation with wrench and pliers
-Available only as option for selected sealed chains
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The MRD7 Series is EK Chains 7th generation motocross specific racing chain. Featuring a revised pin design and CRH chromium carbide coating for maximum wear reduction and performance. A total weight reduction of 3% has been achieved through lightening holes on the inner plates. This also aids in service life as heat is dissipated more quickly and dirt builds up less.
All EK Chains motocross chains utilise our CRH pin treatment which provides an extremely hard outside coating and softer inside to increase strength and reduce chain wear. Exclusive to EK Chains, the Chromium Carbide pin surface coating also offers superior impact and shock absorption while reducing oxidation caused by natural elements.
The MRD7 chain is EK Chains motocross race chain. Highly advanced technology and proven durability make this chain a market leader in Motocross around the world. Used by many riders and factory race teams, the EK Chains MRD7 range is the only choice for Australiaās KTM Factory Racing Team.
The 520MRD7 also features lightening holes in the side plates to reduce the chain's overall weight by 3% without compromising tensile strength. These holes also extend the service life of the chain by dissipating heat and helping reduce dirt and mud build up.
CHAIN SPECIFICATIONS
Pin Length (mm): 17.50
Pin Diameter (mm): 5.24
Roller Diameter (mm): 10.16
Inner Plate Thickness (mm): 2.0
Outer Plate Thickness (mm): 2.0
Tensile LBS/FT: 8,900
Wear Life Index (Standard as 100): 400
Weight 100 Links (kg): 1.52
Seal Type: N/A
Max CC Street: 250cc
Max CC Off-Road: 500cc (4T)
Standard Connecting Link: SPJ
Optional Connecting Link: MLJ
KEY FEATURES OF EK CHAINS
1. ANALYTIC TECHNOLOGY
- State-of-the-art advanced computer technology enables EK to reduce the overall weight by 3% without compromising tensile strength, which in turn extends the life of the chain
- Industry leading machining process of all metal surfaces helps create an unmatched and optimal seal of all EK O-Ring and X-Ring chains
- Additionally mud and dirt build-up is significantly reduced via this technology
2. HEAT TREATMENT
- All EK off-road race chains utilise EKās exclusive CRH pin treatment process, which provides an extremely hard outside coating and softer inside to increase strength and reduce wear
- Superior impact and shock absorption, and reduced oxidation is also a result of EKās Chromium Carbide pin surface coating
3. MATERIAL ANALYSIS
4. SEAL-RING TECHNIQUE
O-Ring - EK O-Ring chain has excellent performance at a great price. EK Chain was at the forefront of Sealed chain development and manufacture in the early 70ās, first used as genuine chain on the Kawasaki Z1. Oāring used for SRO Series.
QX-Ring - QX-Ring is a Slim Profile chain with 40% less friction than a normal O-ring chain and 150% better endurance. Used for SRX2 series, 420SRX and 428ZVX.
NX-Ring - NX-Ring is 15% more durable than QX-Ring. The NX-Ring chain has improved tensile strength & increased weight saving. Used for ZVX3 Series.
SX-Ring - SX-Ring is EKās slimmest profile X-Ring. High tensile strength and increased durability. Used for 520 RXO/SM Series.
5. JOINING LINKS
RIVET TYPE - MLJ
- EKās most dependable connecting link
- More commonly used on street applications
- Requires special riveting tool to install
CLIP TYPE - SPJ Slip Fit
- Easy to install, can be installed with standard pliers
- Comes standard with some non-sealed chains
CLIP TYPE - SKJ Semi-Press Fit
- Easy to install, can be installed with standard pliers
- Re-designed link plate requires additional pressure to push onto the connecting pins but offers increased dependability and a tighter fit
- Comes standard with motocross, off-road and drag racing chains
SCREW TYPE - SLJĀ
- Dependable alternative and easy to install
- Patented mechanism allows easy installation with wrench and pliers
-Available only as option for selected sealed chains
