Chain & Sprockets

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    string(7418) "RK Chain & Sprocket Kit - '520 Steel Quick Acceleration'
Product Overview
The RK 520 Quick Acceleration Chain and Sprocket Kit is built for riders looking to sharpen throttle response, reduce drivetrain weight, and give the Yamaha R1 a more responsive, aggressive feel.
This is a full 520 conversion kit, replacing the stock 525 chain and sprockets with a complete 520 system. By reducing rotating mass and optimizing gearing, the bike feels more immediate under throttle and more connected through the rev range—while still maintaining the durability needed for real street riding.
Key Technology & Design
520 Conversion System (Complete Replacement)
This kit replaces the entire OEM drivetrain with a matched 520 setup.
Includes 520 front sprocket, rear sprocket, and chain
Converts from stock 525 to 520 system
Reduces rotating mass compared to OEM drivetrain
Chain & Sprocket Compatibility
Chain and sprocket sizes must always match.
520 chain must be used with 520 sprockets
525 chain must be used with 525 sprockets
Mixing sizes will cause improper fitment and premature wear
This kit avoids that issue by replacing everything as a set
Premium 520 XW-Ring Sealed Chain
RK’s XW-ring chain is designed for high-performance street and sport riding.
520 XW-ring sealed chain construction
Gold finish for premium appearance
Rivet-style master link included
Rated at 42 kN / 9,450 lb tensile strength
Steel Sprocket Construction
Built for durability while supporting performance riding.
Steel front sprocket for strength and reliability
Steel rear sprocket for long wear life
More durable than lightweight aluminum options
Ideal for aggressive street use
Gearing & Performance
Quick Acceleration Setup
This kit improves responsiveness primarily through reduced drivetrain mass, while slightly altering gearing.
Designed around a 15T front / 41T rear setup
Slightly shorter gearing than stock for improved response
Faster throttle pickup and more immediate power delivery
Helps the bike feel more reactive without drastically changing cruising behavior
Stock vs This Kit
Stock Yamaha R1 / R1M: 16T front / 41T rear — 525 chain
This kit: 15T front / 41T rear — 520 conversion
Smaller front sprocket = quicker acceleration
Maintains similar rear sprocket for balanced street usability
Less drivetrain mass = quicker revving feel
More responsive overall riding character
Real-World Feel
Noticeably quicker throttle response
Slightly stronger pull in lower gears
Why Switch to 520 Over the Stock 525?
Performance vs Durability Tradeoff
Yamaha uses a 525 chain from the factory for durability and long service intervals. A 520 conversion is a common performance-focused upgrade.
520 chain is narrower and lighter than 525
Reduces rotating mass in the drivetrain
Common upgrade for sport and track-oriented riders
What Actually Makes the Difference
You are not gaining horsepower from reducing chain size alone
The biggest performance change comes from gearing adjustments
The 520 setup improves responsiveness and feel
525 remains the better option for maximum longevity and heavy-duty use
Why These Kits Are So Common
Riders typically replace chain and sprockets together
Performance riders prefer lighter drivetrain components
Combines gearing change + chain conversion in one package
Ideal Use
Best For Riders Who Want More Response
Street riding
Aggressive sport riding
Backroad / canyon riding
Riders upgrading from stock drivetrain feel
Fitment
2015–2026 — Yamaha YZF-R1 — Front / Rear
2015–2026 — Yamaha YZF-R1M — Front / Rear
Specs
Brand: RK
Chain Type: 520 ZXW
Chain Size: 520
Seal Type: XW-Ring
Chain Length: 114 Links
Master Link Connector Type: Rivet
Tensile Strength: 42 kN / 9,450 lb
Front Sprocket Tooth Count: 15
Rear Sprocket Tooth Count: 41
Material: Steel
Color / Finish: Gold
Riding Style: Street
Units: Kit
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RK Chain & Sprocket Kit – '520 Steel Quick Acceleration' (Yamaha R1 '15-26)

Chain & Sprockets / RK-Excel

$299.64

Availability: In Stock

Quantity:

Earn $14.98 in UBD Bucks

Fitment:

IMPORTANT: Please Review Your Owner’s Manual for Exact Amounts or Sizing of This Product!

We ship nationwide!

Questions?
Speak to one of our experts today:
469-490-3577

Brand:

RK-Excel

SKU:

1230-1697

Description:

RK Chain & Sprocket Kit – ‘520 Steel Quick Acceleration’

Product Overview

The RK 520 Quick Acceleration Chain and Sprocket Kit is built for riders looking to sharpen throttle response, reduce drivetrain weight, and give the Yamaha R1 a more responsive, aggressive feel.

This is a full 520 conversion kit, replacing the stock 525 chain and sprockets with a complete 520 system. By reducing rotating mass and optimizing gearing, the bike feels more immediate under throttle and more connected through the rev range—while still maintaining the durability needed for real street riding.

Key Technology & Design

520 Conversion System (Complete Replacement)

This kit replaces the entire OEM drivetrain with a matched 520 setup.

Includes 520 front sprocket, rear sprocket, and chain
Converts from stock 525 to 520 system
Reduces rotating mass compared to OEM drivetrain

Chain & Sprocket Compatibility

Chain and sprocket sizes must always match.

520 chain must be used with 520 sprockets
525 chain must be used with 525 sprockets
Mixing sizes will cause improper fitment and premature wear
This kit avoids that issue by replacing everything as a set

Premium 520 XW-Ring Sealed Chain

RK’s XW-ring chain is designed for high-performance street and sport riding.

520 XW-ring sealed chain construction
Gold finish for premium appearance
Rivet-style master link included
Rated at 42 kN / 9,450 lb tensile strength

Steel Sprocket Construction

Built for durability while supporting performance riding.

Steel front sprocket for strength and reliability
Steel rear sprocket for long wear life
More durable than lightweight aluminum options
Ideal for aggressive street use

Gearing & Performance

Quick Acceleration Setup

This kit improves responsiveness primarily through reduced drivetrain mass, while slightly altering gearing.

Designed around a 15T front / 41T rear setup
Slightly shorter gearing than stock for improved response
Faster throttle pickup and more immediate power delivery
Helps the bike feel more reactive without drastically changing cruising behavior

Stock vs This Kit

Stock Yamaha R1 / R1M: 16T front / 41T rear — 525 chain
This kit: 15T front / 41T rear — 520 conversion
Smaller front sprocket = quicker acceleration
Maintains similar rear sprocket for balanced street usability
Less drivetrain mass = quicker revving feel
More responsive overall riding character

Real-World Feel

Noticeably quicker throttle response
Slightly stronger pull in lower gears

Why Switch to 520 Over the Stock 525?

Performance vs Durability Tradeoff

Yamaha uses a 525 chain from the factory for durability and long service intervals. A 520 conversion is a common performance-focused upgrade.

520 chain is narrower and lighter than 525
Reduces rotating mass in the drivetrain
Common upgrade for sport and track-oriented riders

What Actually Makes the Difference

You are not gaining horsepower from reducing chain size alone
The biggest performance change comes from gearing adjustments
The 520 setup improves responsiveness and feel
525 remains the better option for maximum longevity and heavy-duty use

Why These Kits Are So Common

Riders typically replace chain and sprockets together
Performance riders prefer lighter drivetrain components
Combines gearing change + chain conversion in one package

Ideal Use

Best For Riders Who Want More Response

Street riding
Aggressive sport riding
Backroad / canyon riding
Riders upgrading from stock drivetrain feel

Fitment

2015–2026 — Yamaha YZF-R1 — Front / Rear
2015–2026 — Yamaha YZF-R1M — Front / Rear

Specs

Brand: RK
Chain Type: 520 ZXW
Chain Size: 520
Seal Type: XW-Ring
Chain Length: 114 Links
Master Link Connector Type: Rivet
Tensile Strength: 42 kN / 9,450 lb
Front Sprocket Tooth Count: 15
Rear Sprocket Tooth Count: 41
Material: Steel
Color / Finish: Gold
Riding Style: Street
Units: Kit

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