Apico Rear Sprocket - 47T
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Product Information
Full details
The Apico Rear Carbon Steel Sprocket 47T is an ideal performance upgrade for motocross, enduro, and trials riders using 65cc motorcycles, offering superior durability and precise fitment compared to standard components. Engineered from high-strength C45 medium carbon steel, it provides exceptional resilience under intense riding conditions, though users should note that as a steel component, it is heavier than aluminum alternatives while offering significantly longer service life.
All features
| Model Part Number | BN56S 47T BK |
|---|---|
| Brand | Apico |
Extended Product Information
FAQs
Is this sprocket compatible with a 520 chain?
This sprocket is specifically designed for 65cc machines; always verify your chain pitch matches the sprocket specification before installation.
Does the coating affect performance?
The Cataphoresis coating is purely for anti-corrosion and aesthetics; it does not interfere with the chain engagement or material strength.
Do I need new bolts when replacing the sprocket?
While you can reuse existing bolts if they are in good condition, it is professional practice to inspect them for stretch or thread damage and replace them if necessary.
How long will this steel sprocket last?
Because it is manufactured from C45 carbon steel, it will generally outlast standard aluminum sprockets by a significant margin, depending on riding conditions and maintenance.
Why does this have 47 teeth?
47 teeth is the standard gear ratio for these specific 65cc models to provide a balance between acceleration and top speed.
Troubleshooting
Difficulty installing the sprocket on the hub.
Ensure the hub surface is free of dirt or old thread-locker residue and verify the bolt pattern alignment.
Excessive chain noise or slapping.
Check chain tension; even a new sprocket requires the chain to be set to the specific slack recommended by your motorcycle manual.
Pros and Cons
Pros
- Significantly higher durability than aluminum sprockets
- Effective mud-clearing design for consistent performance in wet conditions
- Anti-corrosive coating prevents rust and maintains aesthetic
- High-precision machining ensures optimal chain engagement
Cons
- Heavier than lightweight aluminum or bi-metal sprockets
- Requires regular drivetrain cleaning despite mud-clearing grooves
- Limited to 65cc specific models
Setup, Compatibility & Care
This sprocket is designed as a direct replacement for the following models:
- GAS GAS MC65 (2021-2024)
- KTM SX65 (1998-2024)
- Husqvarna TC65 (2017-2024)
Installation
- Secure the bike on a stand to lift the rear wheel.
- Remove the axle nut and slide the axle out to drop the rear wheel.
- Unbolt the existing sprocket from the hub.
- Clean the hub mounting surface thoroughly before installing the Apico sprocket.
- Torque the sprocket bolts to the manufacturer's specified setting in a star pattern.
- Check and adjust chain tension once the wheel is back on the bike.
Care
Keep the drivetrain lubricated with appropriate chain wax or oil. Regularly inspect the sprocket teeth for signs of irregular wear. If you notice a 'shark fin' shape developing on the teeth, the sprocket and chain should be replaced as a set.