No, you do not necessarily need an attorney but obtaining one if your motorcycle fits the bill under the Lemon law will not cost you a dime, because the law states that the manufacturer has to pay your Lemon Law attorney if you are successful.  There are many nuances of the Lemon Law that have to be adhered to like notifying the manufacturer within 2 years of purchase to allow them to cure the defect and also there is a demand letter that should be sent.  I believe that your best bet would be to contact the Oregon Department of Justice to further inquire here.  They may be able to set you on the path to recovery. Good luck.