Sunline Countershaft Front Sprocket (13-Tooth / 520 Pitch) — Part #0430-520-13 (13144-0064) (27511-49H00)
$5.00
Sale price
$5.00
Regular price
$34.99
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Sunline Countershaft Front Sprocket (13-Tooth / 520 Pitch) — Part #0430-520-13 (13144-0064) (27511-49H00)
$5.00
Sale price
$5.00
Regular price
$34.99
Product Overview
The Sunline Front Countershaft Sprocket (Part #0430-520-13) is a premium, high-strength replacement drive gear built for off-road motocross and race environments. Manufactured by Sunline, this 13-tooth front sprocket serves the crucial purpose of transferring power from the engine's countershaft directly to the rear wheel drivetrain via a standard 520-pitch chain. Engineered as an exact OEM fitment swap, it allows track and trail riders to alter or restore their machine's final gear ratio for optimized acceleration and low-end torque configurations.
Technical Specifications
- Manufacturer: Sunline
- Part Number: 0430-520-13
- Product Type: Drive Train / Front Countershaft Sprocket
- Material: Case-hardened, high-nickel chromoly steel matrix for exceptional core toughness.
- Finish: Natural raw treated steel finish featuring oil-resistant surface coatings.
- Size Profile: 13-Tooth (13T) configuration mapped specifically for 520-pitch final drive chains.
- Fitment Type: Direct OEM replacement upgrade slider matching original countershaft splines.
Key Features & Benefits
- Case-Hardened Core: Crafted using advanced thermal treatments to minimize tooth wear and prevent rounding under high-torque racing stresses.
- Self-Cleaning Mud Grooves: CNC-machined relief trenches between every tooth face systematically eject heavy mud, grit, and track debris, preserving chain life and avoiding binding.
- Precision Spline Tolerances: Broached to exact dimensional limits to eliminate countershaft play, ensuring smooth power delivery and protecting the engine output shaft seal.
- Lightweight Structural Strength: Machined face pockets drop rotating mass without sacrificing gear rigidity.
Confirmed Motorcycle Fitment
This Sunline 520-13T spline profile is a confirmed, direct fit for the following Japanese motocross platforms across 2004 to 2017 model years:
| Manufacturer | Model | Compatible Model Years | Chain Pitch / Teeth |
|---|---|---|---|
| Suzuki | RM-Z 250 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 | 520 Pitch / 13-Tooth |
| Kawasaki | KX250F | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 | 520 Pitch / 13-Tooth |