Why are motorcycles so loud?

Why is that motorcycle engines are permitted to be so loud? If my car made anywhere near the noise levels of most motor bikes it would fail the MoT or I would get pulled by police. I have nothing against bikes. I just wondered if they are manufactured like that or do the owners adjust the exhausts?

Asked on 1 June 2013 by PB, Newcastle upon Tyne

Answered by Honest John
If motorcycles did not make so much noise there would be a lot more dead bikers as a result of dumb car drivers not realising they were being overtaken in traffic.
Similar questions
TMC has stoped working on my Volkswagen Tiguan and it appears to be an issue with several VWG vehicles. Do you know why?
Two years ago when I bought a new Honda CR-V the built in satnav had a traffic icon which when pressed could give a map showing traffic conditions in the neighbourhood and which also calculated and informed...
I have recently bought a 2017 Kia Picanto SE automatic (Mark 2 not mark 3). I learnt to drive in a Polo and the Picanto feels very different when first starting off. The initial forward creep speed barely...
 

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 12% on GAP Insurance

Use HJ21 to save on an ALA policy

See offer