The lifespan of the packing in HMF exhaust can vary significantly depending on a number of factors including the vehicle, specific system, riding style, etc. More aggressive race machines are going to need to repack more often than the average trail rider.
A quick and easy way to judge the condition of an exhaust system is to knock on the shell of the silencer with your knuckles. Hollow sounds while knocking along the length of the shell indicates the packing material has burnt out and the exhaust should be repacked.
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:
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.
Step 2: On the inlet side only, tap all the rivets until the stem drops.
Step 3: On the inlet side only, drill out each rivet.
Step 4: Using a rubber mallet, tap the exhaust shell to remove the inlet.
Step 5: Using a 4mm allen key, loosen the allen screws on the end cap.
Step 6: With the exhaust shell removed, discard of the old packing and wrap the new packing around the core.
Step 7: When wrapping the packing around the core, make sure to make it as snug as possible.
Step 8: Tuck the packing underneath the inlet.
Posted Tuesday, July 01, 2014
