Apico Rear Sprocket - 43T
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Product Information
Full details
The Apico Rear Carbon Steel Sprocket (43T) is designed for motocross, enduro, and trials riders who demand factory-level durability and performance from their drivetrain components. Crafted from aerospace-grade C45 medium carbon steel, this sprocket offers a significant strength upgrade over standard parts while maintaining an exact OEM fit, though riders should note that the metallic finish requires occasional cleaning to maintain its anti-corrosive properties.
All features
| Model Part Number | BN58S43TBK |
|---|---|
| Brand | Apico |
Extended Product Information
FAQs
Is this sprocket compatible with my bike?
This sprocket fits Gas Gas MC50/MC-E5 (2021-24), KTM SX50/SX-E 5 (2014-24), and Husqvarna TC50/EE-5 (2017-24).
Do I need special tools for installation?
You will need standard metric wrenches and a torque wrench to safely secure the mounting bolts.
Does the sprocket come with new mounting bolts?
No, the kit includes the sprocket only; you should reuse your existing high-quality OEM bolts if they are in good condition.
How often should I clean the mud-clearing grooves?
Clean them after every ride, especially if you have ridden in muddy or sandy conditions, to maintain optimal performance.
Can I use this with an O-ring chain?
Yes, this sprocket is compatible with standard, X-ring, and O-ring motorcycle chains.
Why use carbon steel instead of aluminum?
Carbon steel offers significantly higher impact resistance and longevity, making it ideal for harsh terrain where rocks and debris are present.
Troubleshooting
Chain feels loose shortly after installation
New drive components often 'seat' during the first ride; check your chain tension after the first 30 minutes and adjust as necessary.
Excessive noise during operation
Ensure the rear wheel alignment is perfectly straight. Misalignment causes uneven wear and significant chain noise.
Pros and Cons
Pros
- Superior strength compared to stock aluminum options
- Excellent mud-clearing capabilities for wet conditions
- Precise OEM fitment for quick installation
- High resistance to corrosion due to electro-coating
- Professional factory team aesthetic
Cons
- Heavier than aluminum alternatives
- Requires regular drivetrain lubrication
- Finish may scratch over time with heavy debris impact
Setup, Compatibility & Care
Installation of the Apico sprocket is straightforward as it matches OEM specifications for Gas Gas MC50/MC-E5 (2021-2024), KTM SX50/SX-E 5 (2014-2024), and Husqvarna TC50/EE-5 (2017-2024). When installing, ensure all mounting bolts are torqued to the manufacturer's specification using a high-quality thread-locking compound. Care for this sprocket involves routine inspection of tooth wear. Always replace your chain and front sprocket simultaneously to prevent accelerated wear on the new steel rear sprocket. Keep the drivetrain clean and lubricated to preserve the Cataphoresis finish.