MASSACHUSETTS: Info taken from the MASS DOT.... FYI:

Info taken from the MASS DOT.... FYI:

What do they inspect on my motorcycle?
VIN Number/
Registration/
License Plates
Tire and Wheels/
Wheel Bearings Axle Clamps/
Cotter Pins Brake Operation/
Condition Steering Head Bearings/
Stops Handlebars/Fork Tubes/Cables Frame/Body/Fenders Controls/
Mirrors/Horn Headlights/
Headlight Aim Turn Signals/4-Way Flashers Tail Lamps/Brake Lights/ other Lighting Devices Seating/Footrests Fuel System/Engine/
Battery/
Exhaust/Excessive Noise
Swingarm/
Shocks Chain/Sprockets/
Guard Windshield/
Cowling (if applicable)
Safety Bars/Luggage Racks
Sidecar (if applicable)

Generally speaking, you must have a baffle in the exhaust system of a motorcycle. Straight pipes are illegal, and your motorcycle must meet certain noise requirements. For motorcycles manufactured before 1986, 102 decibels is the legal limit, 99 decibels for motorcycles manufactured after 1986.