Supersprox Powerdrive Steel Front Countershaft Sprocket (15-Tooth / 525 Pitch) — Part #CST-1591-15-2
$5.00
Sale price
$5.00
Regular price
$49.99
Skip to product information
Supersprox Powerdrive Steel Front Countershaft Sprocket (15-Tooth / 525 Pitch) — Part #CST-1591-15-2
Supersprox Powerdrive Steel Front Countershaft Sprocket (15-Tooth / 525 Pitch) — Part #CST-1591-15-2
$5.00
Sale price
$5.00
Regular price
$49.99
Product Overview
The Supersprox Steel Front Countershaft Sprocket (Part #CST-1591-15-2) is a premium, competition-spec drivetrain component manufactured by Supersprox, a world leader in high-performance motorcycle gears supplying official factory racing teams. This 15-tooth front engine sprocket efficiently transfers raw mechanical power directly from the transmission countershaft to the rear wheel configuration via a heavy-duty 525-pitch drive chain. Built using advanced European engineering that outperforms standard mild C-45 steel materials, this sprocket serves as a highly precise direct OEM fitment substitute or performance gear modification to optimize acceleration and power-split efficiency on street and off-road motorcycles. [1, 2, 3, 4]
Technical Specifications
- Manufacturer: Supersprox
- Part Number: CST-1591-15-2 (Also styled as CST-1591:15.2 or cross-referenced under SKU 105717)
- Product Type: Drive Train / Front Countershaft Engine Sprocket
- Material: SCM-435 Ni-Chrome Molybdenum carbon-free steel with a gas-impregnated carburized core.
- Finish: Corrosion-resistant black oxide coating with an ultra-hard 0.5mm anti-friction layer.
- Size Profile: 15-Tooth (15T) tooth geometry mapped precisely for a 525 final drive chain pitch.
- Spline Dimensions: 13-spline configuration with a 26mm internal diameter (ID) and a 30mm outer diameter (OD).
- Total Thickness: 11mm exact plate thickness.
- Fitment Type: Direct OEM precision-fit bolt-on upgrade slider matching factory spline tolerances. [1, 2, 3, 4]
Key Features & Benefits
- SCM-435 Carbon-Free Steel: Forged from premium structural chromoly steel featuring an elastic internal core structure that dynamically absorbs high shock loads, preventing the teeth from breaking when worn. [1, 2]
-
Self-Cleaning Mud Grooves: Machined relief trenches at the base of every tooth face actively eject packed dirt, grit, and track debris during extreme riding, preventing excessive chain tension spikes and maximizing overall chain lifecycle efficiency.
[1, 2]
- Fully Lightened Radial Design: Features computer-aided design (CAD) radial recess holes that drop rotating mass to deliver ultra-crisp throttle response without sacrificing gear rigidity. [1, 2]
- Reduced Chain Drag: The specialized 0.5mm case-hardened surface layout significantly drops surface friction, maximizing engine horse-power distribution and preventing power loss caused by chain drag. [1, 2]
Confirmed Motorcycle Fitment
This specific 13-spline (26/30mm) footprint configured for a 525 chain pitch is a confirmed direct fit for the following Yamaha street and sport motorcycle platforms: [1, 2]
| Manufacturer | Model | Gearing Context | Chain Pitch / Teeth |
|---|---|---|---|
| Yamaha | MT-07 / FZ-07 (All sub-models) | Stock Replacement / Gearing Shift | 525 Pitch / 15-Tooth |
| Yamaha | YZF-R7 | High Performance Drivetrain | 525 Pitch / 15-Tooth |
| Yamaha | XSR700 | Retro Heritage Gearing Alignment | 525 Pitch / 15-Tooth |
| Yamaha | Ténéré 700 (XTZ700) | Adventure Touring Final Drive | 525 Pitch / 15-Tooth |