We do have noise regulations for motorcycles, but hardly, if ever enforced. I imagine largely due to the difficult enforcing it. I've gone through the DB test with MP on the lake, and F&G does a good job on snowmobiles. Motorcycles not so much. Interestingly, the regs below are much more lax (i.e. higher) than boats or snowmobiles.
My pet peeve is when the radio is blasting so the rider can hear over their loud pipes
I live on 107 in Gilmanton and this year it reminds me of when we lived on Weirs Blvd. Pretty solid bike traffic from about 8 am to 1 - 2 am. Seems like there is a lot of pent up demand to get out.
motorcycles can't exceed 92 decibels when idling, 100 decibels for 3- and 4-cylinder bikes at 5,000 revolutions per minute and 96 decibels for all other bikes at 2,000 RPMs.