Yes you can, a good way is to accumulate a wanted level, then shake it at a pay and spray for a chuck of 'sale-ness', though this is quite pointless, as the P'n'S is ages away, and on such a badly handling bike, you don't have much chance of getting around too easy.
Also, the thing with drive-bys is you get wanted. Then the cops come ram you off your bike like a little bitch. This = failure, pretty much.
Yup your right...but if ya run down some people on the trail by the water just down from the shop theres lots of people. get a wanted star,and lose it or grab the bribe.but if ya can save for when ya need it,losing one star increases the sale quite a bit.Thats how I completed the harley bike type sales fairly quickly.