found this on
http://https://www.bmw-motorrad-bohling.com/uk/conditions-of-use
BMW USA give 12 months
§ 4 Warranty
(1) The statutory warranty rights are applicable.
(2) If you are a businessman, the following shall apply, despite the contents of paragraph 1:
a) It is understood that the details provided by us and the product description provided by the manufacturer are the only things that represent the properties and condition of the product in question. Other advertisements, blurbs and statements issued by the manufacturer are not considered to be representative of the properties and condition of the said product.
b) You undertake to promptly examine the goods and pay necessary attention to quality and quantity variances and to notify us in writing (via E-mail, for example) of apparent defects within seven days of receipt; timely dispatch will be sufficient for observing the deadline. This also applies to hidden defects that are detected at a later stage (from the time of discovery onwards). Warranty claims cannot be raised if the obligation to inspect and the obligation to give notice of defects are not fulfilled.
c) In case of defects, we provide guarantee through repair or replacement at our own discretion. If the defect is not removed, you can demand a reduction in the price or withdraw from the contract at your discretion. The defect removal is applicable after a failed second attempt, unless the circumstances prove otherwise, in particular due to the nature of the object and/or defect or other conditions. In case of repair, we must not bear the additional costs, which arise from the transfer of the item to a place other than the place of fulfilment, as far as the transfer does not correspond to the intended use of the item.
d) The warranty period amounts to a period of one year after delivery of the product. The shortened warranty period does not apply in situations involving culpably caused damages that can be attributed to us and which are associated with loss of life, injuries or health-related damages. Furthermore, it does not apply in situations involving damages suffered as a result of gross negligence or malicious intent, or in situations involving deceit or contribution claims as per §§ 478 and 479 of the BGB (German Civil Code).