Here is the product installation guide in English:

Installation Guide for Motorcycle Exhaust Pipe Header Gasket

Required Tools:

1. Socket wrench or ratchet and socket set
2. Torx screwdriver (depending on the specific bike model)
3. Pliers or a wrench for gripping the exhaust pipe
4. Gasket sealant (optional)
   5.Clean rag or cloth

Precautions:

1. Ensure the bike is in a well-ventilated area and on a level surface.
2. Wear protective gloves and safety glasses when working with sharp edges or hot surfaces.
3. Avoid touching the exhaust pipe and gasket with bare hands, as the oils from your skin can damage the materials.

Step-by-Step Installation:

1. Remove the old gasket: Use a socket wrench or ratchet and socket to loosen the retaining nuts or bolts that hold the exhaust pipe in place. Gently pull the exhaust pipe away from the engine and remove the old gasket.
2. Inspect and clean the area: Use a clean rag or cloth to wipe away any debris, dirt, or old gasket residue from the area where the new gasket will be installed.
3. Install the new gasket: Take the new gasket and align it with the exhaust pipe and engine mount. Ensure it is properly seated and centered.
4. Replace the exhaust pipe: Slide the exhaust pipe back into place, making sure it is securely attached to the engine mount with the retaining nuts or bolts.
5. Tighten the retaining nuts or bolts: Use a socket wrench or ratchet and socket to tighten the retaining nuts or bolts in a star pattern to avoid over-tightening.
6. Apply gasket sealant (optional): If desired, apply a small amount of gasket sealant to the new gasket to ensure a tight seal.

Tips:

• Always refer to your bike's owner's manual for specific instructions and recommendations for your particular model.
• If you're unsure about any part of the installation process, consider consulting a professional mechanic.
• Regularly check and maintain your exhaust system to ensure optimal performance and safety.

I hope this helps! Let me know if you have any further questions or if there's anything else I can assist you with.