1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your KTM Akrapovic Slip-On Line Muffler, part number 79405979100. This high-quality exhaust component is designed to enhance the performance and sound of compatible KTM 350, 450, and 500 SX-F, XC-F, and EXC-F motorcycle models. Please read this manual thoroughly before proceeding with installation or use.
2. Safety Information
Always prioritize safety when working with motorcycle components. Failure to follow safety instructions can result in injury or damage to the product or motorcycle.
- Ensure the motorcycle is stable and cool before beginning any work.
- Wear appropriate personal protective equipment, including gloves and eye protection.
- Exhaust systems become extremely hot during operation. Allow sufficient time for the system to cool down before handling.
- Keep children and pets away from the work area.
- If you are unsure about any installation step, consult a qualified motorcycle mechanic.
- Dispose of old parts and packaging responsibly.
3. Package Contents
Verify that all components are present and undamaged before beginning installation. The package should typically include:
- Akrapovic Slip-On Line Muffler (Part No. 79405979100)
- Mounting hardware (e.g., springs, clamps, bolts, brackets) - may vary by specific kit
- Installation instructions (this manual or supplementary documents)
If any items are missing or damaged, contact your dealer immediately.
4. Installation
Installation of the Akrapovic Slip-On Line Muffler requires basic mechanical knowledge and tools. If you are not confident in your abilities, professional installation is recommended.
Required Tools (Typical):
- Socket set and wrenches
- Torque wrench
- Spring puller tool (recommended)
- Heat-resistant gloves
- Cleaning supplies (e.g., degreaser, microfiber cloth)
Installation Steps:
- Preparation: Park the motorcycle on a stable surface. Ensure the engine and exhaust system are completely cool.
- Remove Stock Muffler:
- Locate and loosen the clamp connecting the stock muffler to the header pipe.
- Remove any mounting bolts or springs securing the muffler to the frame.
- Carefully slide the stock muffler off the header pipe. Retain any reusable gaskets or hardware if instructed by the Akrapovic specific manual (not provided here).
- Install Akrapovic Muffler:
- Clean the connection point on the header pipe to ensure a proper seal.
- Carefully slide the Akrapovic slip-on muffler onto the header pipe. Ensure it seats fully.
- Attach any springs or clamps provided with the Akrapovic system to secure the muffler to the header pipe.
- Mount the muffler to the motorcycle frame using the provided brackets and bolts. Do not fully tighten yet.
- Adjust the muffler's position for optimal alignment and clearance.
- Once aligned, progressively tighten all clamps and mounting bolts to the manufacturer's specified torque settings. Refer to your motorcycle's service manual for frame mounting bolt torque specifications.
- Final Check:
- Double-check all connections for tightness.
- Ensure there is adequate clearance between the muffler and other motorcycle components (e.g., swingarm, bodywork).
- Start the engine and check for any exhaust leaks. Small leaks may seal themselves after a few heat cycles.
Note: This is a general guide. Always refer to the specific installation instructions provided by Akrapovic for your exact muffler model, as procedures may vary.
5. Operation and Break-in
After installation, a proper break-in period is recommended for new exhaust systems to allow all components to settle and seal correctly.
- Initial Start-up: Run the engine at idle for a few minutes to allow the exhaust to heat up gradually. Check for any unusual noises or smells.
- First Rides: For the first 50-100 miles, avoid prolonged high-RPM operation or sudden, aggressive acceleration. This allows the exhaust system to undergo several heat cycles and for any internal packing materials to settle.
- Sound Characteristics: The sound of the exhaust may change slightly after the break-in period as the internal components settle.
6. Maintenance
Regular maintenance will ensure the longevity and optimal performance of your Akrapovic muffler.
- Cleaning: Clean the muffler regularly with a mild, non-abrasive cleaner and a soft cloth. Avoid harsh chemicals or abrasive pads that can damage the finish. Ensure the exhaust is cool before cleaning.
- Inspection: Periodically inspect all mounting bolts, springs, and clamps for tightness. Re-torque if necessary. Check for any signs of cracks, dents, or corrosion.
- Heat Shields: If applicable, ensure heat shields are securely fastened and free from damage.
- Repacking (if applicable): Some performance mufflers require periodic repacking of the internal sound-damping material. Refer to Akrapovic's specific guidelines for your muffler model.
7. Troubleshooting
Below are common issues and their potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Excessive Noise / Rattling | Loose mounting hardware, internal baffle damage, exhaust leak. | Check and tighten all bolts and springs. Inspect muffler for damage. Check for leaks. |
| Exhaust Leak | Improperly seated muffler, loose clamp, damaged gasket. | Ensure muffler is fully seated. Tighten clamps. Replace damaged gaskets if necessary. |
| Discoloration | Normal heat discoloration (especially on stainless steel/titanium), improper engine tuning. | Some discoloration is normal. If severe or uneven, consult a mechanic for engine tuning check. |
If problems persist, contact your dealer or a qualified service technician.
8. Specifications
- Brand: KTM (Akrapovic)
- Model: Slip-On Line Muffler
- Part Number: 79405979100
- Compatible Models: KTM 350 SX-F, 450 SX-F, 500 SX-F, 350 XC-F, 450 XC-F, 500 XC-F, 350 EXC-F, 450 EXC-F, 500 EXC-F
- Material: Stainless Steel (as per product specifications, actual Akrapovic materials may vary by specific model, often titanium or carbon fiber for outer sleeve)
- Vehicle Service Type: Motorcycle
9. Warranty and Support
This Akrapovic product is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official Akrapovic or KTM website. Keep your proof of purchase for warranty claims.
For technical support, spare parts, or further assistance, please contact your authorized KTM dealer or Akrapovic distributor.
10. Product Images
No specific product images of the Akrapovic Slip-On Line Muffler (Part No. 79405979100) were provided in the input data. For visual reference, please consult the product listing where you made your purchase or the official KTM/Akrapovic websites.
11. Official Product Videos
No official product videos from the seller were provided in the input data for this Akrapovic Slip-On Line Muffler. For visual demonstrations or sound clips, please refer to official Akrapovic or KTM channels, or reputable motorcycle media outlets.