Sunstar Powerdrive Steel Front Countershaft Sprocket (16-Tooth / 428 Pitch) — Part #23516
$5.00
Sale price
$5.00
Regular price
$39.99
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Sunstar Powerdrive Steel Front Countershaft Sprocket (16-Tooth / 428 Pitch) — Part #23516
$5.00
Sale price
$5.00
Regular price
$39.99
Product Overview
The Sunstar Powerdrive Steel Front Countershaft Sprocket (Part #23516) is a premium, high-strength replacement engine gear manufactured by Sunstar, a premier global manufacturer trusted by top motorcycle builders since 1946. This 16-tooth drive sprocket transfers engine power directly from the transmission countershaft out to the final drive drivetrain via a standard 428-pitch drive chain. Selecting this upgrade is a highly popular gearing modification for dual-sport and trail riders seeking a larger 16T layout to lower engine RPMs during highway cruising, improving top-speed efficiency and smoothing out street performance. [1, 2, 3, 4, 5, 6]
Technical Specifications
- Manufacturer: Sunstar
- Part Number: 23516 (Also cataloged as 235-16)
- Product Type: Drive Train / Front Countershaft Engine Sprocket
- Material: Case-hardened, high-grade chromium-molybdenum steel for superior tooth durability.
- Finish: Premium "Parkerizing" chemical surface finish providing advanced rust and corrosion resistance.
- Color: Matte Black / Natural Dark Raw Steel.
- Size Profile: 16-Tooth (16T) profile cut explicitly for a 428 final drive chain pitch.
- Fitment Type: Direct OEM replacement upgrade slider matching original manufacturer spline dimensions. [1, 2, 3, 4]
Key Features & Benefits
- Forged Chromoly Steel: Formulated using ultra-strong forged chromoly steel matrices to withstand violent shock loads, preventing tooth rounding or edge breakdown. [1, 2]
- Anti-Corrosion Parkerized Layer: The specialized chemical coating prevents rust buildup from road salt, water, and trail dirt, keeping your sprocket looking cleaner and lasting longer. [1, 2]
- Micro-Tolerance Spline Broaching: CNC-machined to exact factory dimensional thresholds to eliminate countershaft micro-play, keeping power distribution completely linear and defending transmission output shaft seals from stress-induced leaks.
- Cruising Comfort: Increasing your front sprocket to a 16-tooth configuration reduces high-RPM engine buzzing at highway speeds, offering a quieter and more relaxed street ride. [1, 2]
Confirmed Motorcycle Fitment
This specific "235" spline footprint configured for a 428 chain pitch is a confirmed direct fit for the following lightweight Japanese dual-sport and trail motorcycles: [1, 2]
| Manufacturer | Model | Compatible Model Years | Chain Pitch / Teeth |
|---|---|---|---|
| Yamaha | XT250 | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 | 428 Pitch / 16-Tooth |
| Yamaha | XT250X | 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 | 428 Pitch / 16-Tooth |
| Yamaha | Serow 250 | 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 | 428 Pitch / 16-Tooth |
| Yamaha | Tricker (XG250 / S) | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 | 428 Pitch / 16-Tooth |