Dirt Bike FAQ

The muffler and expansion chamber are held on with springs. They've got lots of tension, and can be very difficult to remove without a tool made specifically to pull these springs.

Sometimes you can do it with a pair of needle nose pliers and lots of muscle.

Remove the muffler first, then the expansion chamber.

You will need new springs and some hi-temp silicone (use at both ends of the expansion chamber – into the cylinder and onto the muffler) before you re-install the system.