Sunline SL-1 Steel Front Countershaft Sprocket (13-Tooth / 520 Pitch) — Part #0326-520-13 (23803-KS6-700)
$5.00
Sale price
$5.00
Regular price
$29.99
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Sunline SL-1 Steel Front Countershaft Sprocket (13-Tooth / 520 Pitch) — Part #0326-520-13 (23803-KS6-700)
$5.00
Sale price
$5.00
Regular price
$29.99
Product Overview
The Sunline SL-1 Steel Front Countershaft Sprocket (Part #0326-520-13) is a high-strength, premium replacement engine drive gear manufactured by Sunline and distributed by Parts Unlimited. This heavy-duty 13-tooth front sprocket anchors your machine's primary drive system, efficiently transferring mechanical power directly from the transmission countershaft to the rear wheel assembly via an industry-standard 520-pitch drive chain. Engineered as an exact OEM replacement alternative, it delivers smooth power-split mechanics, reliable chain tracking, and original factory longevity under rigorous track and trail conditions.
Technical Specifications
- Brand / Manufacturer: Sunline / Parts Unlimited
- Part Number: 0326-520-13 (Catalog ID: 0326-520-13)
- Industry Cross-Reference: JTF326.13 / SF326-13
- Product Type: Drive Train / Front Countershaft Engine Sprocket
- Material: Case-hardened, high-grade SCM420 chromoly steel alloy for absolute core hardness and structural toughness.
- Finish: Natural raw treated steel finish featuring oil-immersion protective coatings.
- Size Profile: 13-Tooth (13T) configuration mapped specifically for a 520 final drive chain pitch.
- Fitment Type: Direct OEM replacement slider matching original manufacturer spline clearances.
Key Features & Benefits
- SCM420 Chromoly Matrix: Fabricated from structural steel alloy that resists structural bending, chipping, and accelerated tooth breakdown under intense track conditions.
- Advanced Hobbed Profile: Every single tooth is precision hobbed and drilled rather than cheap surface-stamped. This achieves incredibly narrow assembly tolerances and fluid chain-roller engagement.
- Induction Thermal Hardening: Fully heat-treated to optimize face surface rigidity while maintaining a shock-absorbing internal core to withstand sudden acceleration stresses.
- Drivetrain Preservation: Engineered to maximize contact area along the transmission splines, preventing countershaft rounding and eliminating micro-wobbles that cause output shaft seal leaks.
Confirmed Motorcycle Fitment
This specific spline configuration and 520 chain pitch offset is a confirmed direct fit for the following classic Japanese motocross platforms across 1987 to 2003 model years:
| Manufacturer | Model | Compatible Model Years | Gearing Context | Chain Pitch / Teeth |
|---|---|---|---|---|
| Honda | CR125R | 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 | Stock Gearing / Direct Replacement | 520 Pitch / 13-Tooth |