How to Make My Motorcycle Exhaust Quieter to Pass the Inspection

Written by don davis
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How to Make My Motorcycle Exhaust Quieter to Pass the Inspection
Many jurisdictions strictly enforce motorcycle noise laws. (Christopher Furlong/Getty Images News/Getty Images)

Motorcycle noise standards vary greatly. For example, the federal standard is 80 decibels, which is the loudness of a dial tone, but California's standard is 95 decibels, which is the sound of a subway train at a distance of 200 feet. If your motorcycle exhaust is too loud to pass inspection, a quick and easy solution is to replace the mufflers on your bike with quieter slip-on mufflers.

Skill level:
Moderately Easy

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Things you need

  • Flat head screwdriver
  • Penetrating oil
  • Torx wrenches (optional depending on foot pegs)
  • Allen wrenches (optional depending on foot pegs)
  • Open end wrenches
  • Socket wrench and sockets
  • Rubber mallet

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Instructions

  1. 1

    Remove the front and rear head pipe heat shields by loosening the worm clamps that secure the shields to the pipes with a flat head screwdriver.

  2. 2

    Loosen the muffler joint clamps where each muffler connects to the exhaust pipes. Apply penetrating oil to the slip joint notches if they are stiff.

  3. 3

    Insert a flat head screwdriver inside each slip joint notch. Pry open the slip joints on both mufflers with the screwdriver.

  4. 4

    Remove the right passenger peg with a Torx wrench, Allen wrench, or open end wrench depending on the fastener used on your motorcycle. Remove and save the bolts that attach the mufflers to the mounting bracket.

  5. 5

    Loosen, but do not remove, the exhaust manifold bolts with a socket and socket wrench. Do not remove the bolts, head pipes or exhaust gaskets.

  6. 6

    Remove both mufflers by persistently twisting, pulling and tapping them with a rubber mallet.

  7. 7

    Remove the muffler brackets from your currently installed mufflers and bolt them to the mounting bracket with a socket wrench and socket.

  8. 8

    Remount the front muffler on the slip joint. Loosely reinstall a slip joint clamp over the front muffler slip joint. Loosely attach the front muffler to the lower mounting bracket holes.

  9. 9

    Remount the rear muffler on the rear muffler slip joint. Loosely reinstall a slip joint clamp over the rear muffler slip joint. Loosely attach the rear muffler to the upper mounting bracket holes.

  10. 10

    Tighten both slip joint clamps with a socket wrench. Tighten all muffler bracket and mounting bracket bolts with a socket wrench.

  11. 11

    Tighten the exhaust manifold bolts with a socket wrench and socket. Reinstall the right passenger peg. Reinstall the front and rear head pipe heat shields by tightening the worm clamps with a screwdriver.

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