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Tech Exhausts

How do I repack my exhaust?

Typically, the average rider will need to repack their exhaust after about 40-50 hours of riding. This can vary, however, depending on the type of riding you do. More aggressive race machines are going to need to repack more often than the average trail rider. 

Why are there no repack kits online?

Due to the construction of our mufflers, we don’t recommend trying to repack an HMF muffler on your own.  There are specialized tools and parts required to repack our mufflers correctly, like a pneumatic rivet gun.  HMF highly recommends sending in your exhaust for repacking service unless you have prior experience repacking exhausts.  

Repack/Repair Services

HMF has repack and repair services available at very reasonable pricing.  When you send in your muffler, we will clean, repack, and repair it to be just like new.  To have us repack your muffler:

  • Fill out our Repair/Repack Form
  • Print out the Repair/Repack Form.
  • Send us your muffler with the Repair/Repack Form.
  • HMF will contact you about the repairs
  • Turn around time is usually 2-3 business days.

How do I repack my exhaust myself?

If you have the tools and experience to repack the exhaust yourself, you'll need to contact us directly for the proper materials.  Please note that our exhausts require an air rivet gun or an automotive-style riveter. A small hand riveter will not work for this.

Click here to download these instructions in PDF format. (1MB) 

Step 1: Using a marker, draw a line representing the clock position of the inlet and exhaust.

How do I repack my exhaust?

Step 2: On the inlet side only, tap all the rivets until the stem drops. 

How do I repack my exhaust?

Step 3: On the inlet side only, drill out each rivet. 

How do I repack my exhaust?

Step 4: Using a rubber mallet, tap the exhaust shell to remove the inlet. 

How do I repack my exhaust?

Step 5: Using a 4mm allen key, loosen the allen screws on the end cap. 

How do I repack my exhaust?

Step 6: With the exhaust shell removed, discard of the old packing and wrap the new packing around the core. 

How do I repack my exhaust?

Step 7: When wrapping the packing around the core, make sure to make it as snug as possible. 

How do I repack my exhaust?

Step 8: Tuck the packing underneath the inlet. 

How do I repack my exhaust?

Posted Tuesday, July 01, 2014

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