How to Replace a Dirt Bike Muffler

A muffler is a metal cylinder at the tail end of a dirt bike's exhaust system, and is in place to reduce exhaust noise. One type of muffler, most often used on dirt bikes, is filled with fiberglass sound-deadening material surrounding a metal core with holes in it. The other type of muffler is filled with a baffle. A baffle is a metal cylinder that looks like a honeycomb with holes in it. The exhaust is pushed through the baffle channels, which breaks up the exhaust pulse reducing the noise.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Replacement muffler
• Replacement headpipe to muffler seal
• Metric socket set

Remove the Muffler

1. Take off the dirt-bike seat using the appropriate sized socket to remove the two bolts that hold it in place.

2. For ease of access to the muffler, take off the right-side number plate using the appropriate sized socket. There are two bolts to remove.

3. Loosen the bolt that attaches the muffler pipe to the dirt-bike frame.

4. Tug firmly on the muffler to pull off the pipe. It connects to the exhaust pipe simply by slipping on.

Replace the Muffler

5. It is sometimes necessary to replace the headpipe-to-muffler seal that fits between the muffler pipe and exhaust system pipe. Fit the replacement muffler and seal firmly into place.

6. Tighten the bolt that attaches the muffler pipe to the frame. This is the muffler clamp, and it also holds the seal in place.

7. For ease of access to the muffler, take off the right-side number plate. There are two bolts to remove.

8. Reattach the right-side number plate with its two bolts.

9. Reattach the seat by with its two bolts.

Who Can Help Sponsored