I agree with all of you that nothing will happen about the motorcycle noise unless people in the neighborhood report and complain to the pols and the police and no offense to the spirit of activism in these posts but you are not the first Astorians to complain about this issue.
The neighborhood has a long history of 'loudmouths', many in my own family (and I say this with pride, not derision) who take this seriously and DO know how to work the system but nothing ever gets done.
In my opinion it's simply no use to say to the authorities "do something." You need to tell them what to do and in my 40+ years of Astoria living the only action taken that has had any affect to abate (not eliminate) the noise is the setting up of roadblocks/check points by the police, along Ditmars and other major streets AND closing off Shore Boulevard on weekend evenings/nights.
But these kind of checkpoints requires a huge effort in terms of staffing and expense and I don't think the city wants to spend the money. It also means inconvenience to every driver held up in traffic, car honking, and people who resent the police presence -- all which generate more complaints, so there is a trade-off here.
I had asked this in another posting on this subject: What other actions do you think would help alleviate this problem? In my experience it's always helpful to have a solution to every complaint.