I think Maria will ground him for 30 days, besides, it's just the one with the sidecar, I'm sure he has several others. I've always wondered how many motorcycle riders don't have the proper endorsement. I'd guess it's fairly high.
How many tickets have you given for it?
ETA, from the DMV handbook for Motorcycles
A 2 wheeled motorcycle with a sidecar weighting less than 1500 lbs. is till considered a motorcycle.